Follow us on:

Pocket porting vortec heads

pocket porting vortec heads in 1986 and a legend was born. 60 swirl polished exhaust valves. Stock type stamped steel 1. 236 110 LS, 3/8" ported carb spacer, holley electric fuel pump, Brand new stainless 1. 495 lift . 041" compressed thickness RHS™ #1701 Cylinder head gasket, 4. 00 pm) – each student will get the opportunity to pocket port a pair of cylinders of the EQ BBC test heads. Porting appears to be a very mild bowl cleanup. 5:1 w 64cc combustion chambers and Comp xe268 cam w/ 224/230 duration . A. Joined Jul 11, 2007 · 65 Posts . Heads are assembled with new stainless 1. 5:1 CR ’89 Tuned Port Injection Stock runners Stock TB Scoggin dickey TPI Vortec intake #SD3816 24lb blue top injectors CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. Dart S/S VORTEC SBC Iron Cylinder Head Part# 10024370 Material: Superior iron alloy Comb Chambers: 67cc Intake Valve Dia: 1. 250 lift) Hardened retainers and springs 2. 480 in. 02's, but i also for the price of having those redone i can get a set of afr 195 that are ready to go but im just worried it will be too much power for the Head Gaskets: RHS™ #1700 Cylinder head gasket, 4. They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. We offer some specialized headers for these blocks. D. gm/ford/mopar performance). The Vortec heads are much like other stock small-block heads in that the intake port flows fairly well, but higher rpm power is limited by a weak exhaust port. 88 View Item Details Alum Heads Sbc Chevy 200cc 64cc 2. i'd stick with between a 268 and 280 advertised duration camshaft for good street manners. Step 5: Scrub the connection point. • Class released at 8. If any one has a better photo of the right way to port these TPI heads . Small block chevy head castings; Casting # Combustion Chamber size CCs Intake valve Exhaust valve Production Years Misc Engine; 10033867: 62cc: 2. I understand from what I found on the WEB that it has vortec heads with 100cc combustion chambers and are nice heads up to 5000 rpm. The problem with these heads is the limited lift capability in stock form. 049 seconds at 100. 230/. Conversely, hot performance engines and headwork go hand in hand. The latest Chrysler Hemi engine is the latest high-tech design. After some tuning sessions, the car's final run was 14. 050 hyd cam, rough idle, enough vacuum to run power brakes. 15 thou shim head gasket. These Vortec Ported Throttle Bodies also feature our High Flow Throttle Blade, thinned throttle shafts and button head screws! Why purchase an aftermarket $395. Part Type: Cylinder Head Application: Chevrolet Small Block, Vortec Intake Manifold Bolt Pattern Cylinder Head Material: Cast Iron Bare or Assembled: Bare Combustion Chamber Size: 64cc CNC Machined Combustion Chambers: No Intake Valve Angle: 23 Exhaust Valve Angle: 23 Intake Port Volume: 170cc CNC Machined Intake Port: No The objective of porting a cylinder head is to improve engine performance via constructive enhancements to the intake and exhaust flow paths. All flow numbers for FLO Headworks Ported heads come from their Web Site. The top kit is about 3000. I would have them pocket ported but that's all. 467 CU IN, 570 HP, 580 TQ, 9. e. The first has to do with port shape. Vortec heads with a little pocket porting. The radiator we offer do not have the steam release provision. I'm sure the new heads have better combustion chamber design to which makes a huge difference in hp. 8? It's only 293 ci The ramp on the Vortec pocket was slightly cut down and smoothed for airflow, but the swirl design was in the port job. I would think, if you intend to rev up any SBC over 350ci, especially the 383, would benefit from aftermarket heads having bigger runners to handle the Port Flow and much cheaper in The reason that CNC-ported heads—or any ported head for that matter—generally flow better than as-cast heads is because the casting process is somewhat less than completely accurate. They also feature GM logo cast into bottom of intake ports. (i. 020 - 1. 200", and repeat the test, again at 25" of water. $375. 8L, 5. How much power could I pick up from port work, what port work should I do? It is a mild set up but it is race only. 100". No machining, i. 3L vortec; or simply have a pocket port done to the 5. Be sure to subscribe and give the video a thumbs up if you like it. Open the valve to the next increment of lift, such as. Pricing is for traditional V-8 cylinder head pairs. 600" exhaust valves Specifications Intake Exhaust Port Volume: 170cc 67cc Port Dimension: 1. 19% 547 hp-----Chevy Vortec / Bow Tie Small Port Iron: 175/65: 2. 51% 483 hp: 236/163 69. produced more torque and offered excellent midrange power, peak power was actually down by 10 horsepower in the first year of EFI. 02 polished intake valves 1. 19% 551 hp 598 hp----N/A N/A 1. No aftermarket performance cylinder heads. cylinder heads, a hydraulic roller cam, and other changes. All flow numbers for Flowtech - Steven Magnotti Ported heads come from them Contact updated Feb. A balnced assembly and stock balancer beats stock assemby and upgraded balancer 90% of the time. 00 throttle body? Texas Speed & Performance is your one-stop shop for all LS and Gen 5 LT1 & LT4 performance parts and engines! We are among the largest LS and Gen 5 LT1/LT4-specific shops in the country, and we machine and assemble all of our engines, camshafts, and Precision Race Components cylinder heads in house! It also is available in a straight plug version with the plug location patterned after the GM Vortec head. They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. 550 without the need for machining the heads. 460. definately leave port smaller than the gasket in my experiance anyway with no flow bench on turbo style heads the exhuast side is where the kaw 2v heads tend to benefit most since intake is force fed anyway running a size over on exhuast valve with the d shaped port and stock From what I gather, to get swirl you need to direct flow to the cylinder wall side of the port. thoroughly cleans, inspects, and pressure tests all our cylinder heads. Features include extra-thick decks, under-sized intake and exhaust runners and increased wall thickness to allow for custom CNC porting. It's a big port. This should be filled in with epoxy to improve air flow. 00/1. Start by placing the head with the intake manifold face down on the bench and working the floor, or short side radius, of the intake pocket. Tip: If a crack is found in the cylinder head the cylinder head must be replaced. I try to make this a budget build why I will reuse the heads after some minor pocket porting. Im not sure what heads to run though i have a set of world s/r or a set of 882 both have been pocket ported and have 2. 600 8mm valves, #1256 Felpro intake port opening. Flow measured at 28" of depression. AFRs still kills them though in flow and power even with less compression. These heads, and the accompanying FAST LSXr intake, offer excellent velocity and port flow. Engine short block: 99 5. Feel free to contact us for any custom quotes. We take the Vortec big-block from this 1996 Chevy truck dually to Superior Automotive to have the heads flowed and ported and more, only on sporttruck. 3, LS1, LS6, LS2, LQ4/9) to us for porting. 660" lift capacity out of the box! The Best Value in LS Heads - RHS Pro Action LS3 Heads are simply the best bang for the buck LS heads available. We also do 1,2,3,4,6,10, and 12 cylinder engine head work. 95/1. You can pay around $1,200 for a good professional porting job. Wish List Compare. O. Whether they're the work You want to watch this: Cylinder Head Games–How Big Is Too Big - Engine Masters Ep. 0L LS engine. We built them for use in our Super Stock. Re: Pocket porting and flow numbers for 041 heads 05-03-02 05:07 PM - Post# 104413 In response to bigjimzlll i guess 041s are supposed to be better than humps since they're small chamber, flow well(no idea of runner volume) and have accessory holes. My D0xx heads are missing this bias. There are three basic differences between the LS1 and LS6 heads. Heads are identified with the Bow-Tie logo on the exterior of the head below exhaust flange and Vortec logo on top of intake port area. 02 intake and 1. 5 INCHES OF INTAKE PORT LENGTH ON AVERAGE FROM INTAKE GASKET TO THE BACK OF THE INTAKE VALVE AT THE FAR EDGE USE THE CALCULATORS to match port size to intended rpm levels but keep in mind valve lift and port flow limitations [/color] Used Vortec single RHS SBC BARE HEAD #12407 racing head service Chevy 3917291 cylinder heads camel hump SBC fuelie hardened seats pocket ported. Leave some aluminum there for anti-reversion. If not, look into what's referred to as pocket-porting to clean up the area in the bowls and the transition area between the How much does “UnderCover Porting” help? The heads required for many racing applications such as Vortec, Dart SS, Engine Quest 350I, Engine Quest Vortec, Double Hump and Open chamber heads were designed for street applications, or as street replacement heads, where the engine doesn’t see much over 4,000 rpm. I have put over 20 working hours into my sunfire's head. Surfacing allowed. 660" Lift Springs & Steel Retainers . In ported form, they rival a set of $10,000 Cup-Car heads. These blocks also require a steam rel ease port on the radiator. 035 to . 3L, 5. The result is a ten percent improvement over the unported LS9 head. I’ve read that by using the beehive springs they increase the max lift to . Mount the head on the head adapter, open the intake valve to the first increment of lift, say,. With the Cam Dynamics 278 still in the motor, and the Chevrolet high rise intake and Q-jet carb, horsepower jumped to 340 at 5000 rpm, For the record pocket porting heads is all about focusing on Rule #1 too the exclusion of almost all else. For Chevy Small Block 350 Sbc 200cc 68cc Straight Aluminum Bare Cylinder Head 165. you Porting & polishing the 305 Cylinder Heads : October 7th 2000: Project update. The Mast cylinder head catalog includes a comprehensive lineup of 11-degree cathedral-port castings ranging from 215 to 265 cc. Some diy Port flow improvements for my SBC heads & a few of my porting tips. Inside the pocket of the intake has a ridge that produces a better swirl of air flow and a 1. 600 exhaust valve with a smooth pocket to exit the gas quickly. Jump to Latest Follow 1 - 12 of 12 Posts. Stock 049 heads power plenty of 10sec cars at the track and make well over 500hp with just a 427. No aluminum heads allowed. If those are the "peanut port" GM oval port heads that are on your engine, then I would at least bowl/pocket port the heads---especially if you are going to use a cam as large as the Crane 731 (kinda big for a 454cid). But these get close when ported up. 0 68. The price listed is for you sending your cathedral port cylinder heads (4. 07% 485 hp 527 hp----235. EFI (electronic fuel injection) was finally added to the 5. ‏‪The 6. 165" bore X . 600 valve lift. Those heads are awesome. To illustrate this, we ran a test many years ago on a set of iron 1. 500 lift-Planed (Originally 76cc, now 72cc)-New valve seals and guides-Freshly painted-Will even throw in a set of old valve covers for them "Holy cylinder heads Bat Man!" At the conclusion of the cam tests, I installed a set of 74 cc Dart/World Products heads which I had done minor pocket porting on, with 2. g. 0L H. 030-over 454). Look at the vortec heads combustion chamber for inspiration, within the practical limits of the casting at hand. 5 will include aftermarket 2. of lift. Taking your heads to machine shop is costly and having to go through a set of head All other Vortec and Vortec-style heads prohibited, including but not limited to Vortec Bow Tie, Edelbrock, EQ, GM Fast Burn, etc. Tbi porting Tbi porting I'm building a pretty mild 350 i have a brand new gm goodwrench crate motor. 95 25534421 SB Chevrolet Complete Small Port Vortec Bow-Tie Cylinder Head $489. They are identified with the Bowtie Emblem on the exterior of the head, below the exhaust flange, and the Vortec logo on top of the intake port area. 7 CHEVY 350 VORTEC 906 CYLINDER HEADS 1996 - 2002 SBC TRUCKS VANS NO CORE 6 - NEW 5. Sold intake to pan, balancer to flexplate. 3 (still tunning) any ways, the 4. 508: Chevy Vortec / Bow Tie Large Port Iron: 206/77: 2. 95 12464298 Fast Burn SB Chevrolet Aluminum Cylinder Head $609. 8l5. 041" compressed thickness Head Bolts: HB350P EngineQuest or ARP #134-3701 HP head bolt set, 265-400 SBC Head Studs: ARP #234-4301 8740 head stud set, 265-400 SBC heads, maximum valve size, 194/150, valves must be stock length and diameter for make of engine being used, rhs heads 12402 or 12400, wp 4360 or 4361, pro to p line 223769416t or 223784176t, dart 10021070, dart 10024361, dart 10024360, gm double hump,no angle plug, no vortec, no angle milling, no porting, no polishing, no gasket matching, no . They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. No special components are required with the CNC ported BRODIX Track 1® head. The other photo is a stock pocket of the #193 . This mass then impedes air flow. 5 exhaust), 0. Feel free to contact us for any custom quotes. If that's true, then why a 4. Read all you can and have fun. 95 I agree I had both sets of heads in my garage and I ended up putting $500 into the vortec heads to get, new valve springs and retainers, get the spring seats cut, valve guides cut for higher lift, screw in rocker studs, and pocket ported. and the superchargers about 5500-6000. The cheapy balancers like doorman suck across the board, not just the 6. The 496 has very similar flow numbers and I think actually better IIRC. 5 ratio rockers only. 500" lift that is 4. • 1. 4cfm at . Excellent muscle car replacement. 0/5. Fine-tuning was next on our list to see if we could push this bad boy over the 400hp mark. The 5. 00. Sep 3, 2020 - Explore Mario Reyes's board "head porting" on Pinterest. The Vortec heads are a great deal but use a unique intake manifold design. Stocked With More Power Our stock replacement cylinder heads live up to EQ’s reputation for quality parts and incredible service. One of them I cleaned up and the other needs some paint taken off, and a rocker stud replaced. 94-/1. Others will tell you that the C302B head has a smaller port but flows as much with a smaller valve. The 65cc chambers are designed for flat top or dished pistons; domed pistons will require additional machining. 190cc SBC Eliminator Vortec Street Head The Small Port,High Velocity Specifications, Features, and Optional Supporting Components The AFR Vortec Emissions Legal (CARB EO #D-250-2), 190cc intake port small block Chevy cylinder heads are available in straight plug version. But the Vortec heads also benefited from pocket porting. Since good sand cast heads can maintain a plus or minus tolerance of 0. With pocket porting, the area under the valves seats is addressed to eliminate any restrictions. Save yourself hundreds of dollars by repairing your old block or head. 00. 6 ratio rockers as follows: Lift (In/Exh) Duration (In/Exh) . 940” Intake Port volume: 175cc Intake Port Dim: 1. valves Intake: Edelbrock Performer RPM Vortec Camshaft: Comp Cams Xtreme Energy 268 hydraulic, with 0. The industry standard has been taken to the next level with modernized CNC porting. AFRs, though, require deep pockets. 40 pm to conclusion of BBC session (about 8. 060-inch), this has a substantial effect The Vortec L-29 heads took the place of the "peanut port" heads and do a good job. 000/1. Plus your intake won't work with Vortec heads, different bolt configuration and much taller ports on the heads. No angle plug heads. Midwest Cylinder Head and Machine can repair and recondition your cracked or otherwise damaged aluminum and cast iron cylinder heads and cylinder blocks to like new condition. Utilizing innovative design features, modern engineering methods and precision CNC-machining, Pro Elite™ Cylinder Heads are second-to-none. The 906 and 062 Vortec heads (referred to by the last 3 digits of their casting numbers) feature raised intake ports, high-quench 64cc combustion chambers, and 1. My semi educated opinion on 8. of lift and 224/230° of duration @ 0. In some cases, we may offer 2 different CNC ported versions such as our Stage 3 ported LA or magnum Edelbrock heads, and the BigMouth heads with pushrods moved over to widen the port at the pushrod restriction and increase the port volume. I have an SRT8 and im trying to decide between using SHOPHEMI'S 2/ ported heads and cam replacement for a proported 108 hp power gain or a vortec / procharger supercharger kit with 150hp. 477/. The head comes with both center bolt and perimeter bolt valve cover patterns. The LT4 HOT cam is spec'd with 1. Pro Filer Small Block Chevy All American Heads with 185cc Intake Runner, 2. Basically, work the port floor by grinding straight in the pocket following the angle of the valveguide, out to near but not at the 90-degree throat line. 530 in. Oh yeah what do you think of those Edelbrock Etec heads? Lots of people like to use the GM Vortec head with the castings of 062 and 906. I don't understand why you can't do both. LT4 intake ports are raised, and use different cylinder heads and intake port gaskets. They also feature GM logo cast into bottom of intake Air Flow Detail #176 SBC All American Head - 185cc Runner. Im running a 355 with 10. Repower a Chevy SS 454 With Heads, Cam & EFI Part 2 Swap an LS into a 5th Gen Monte Carlo Convert Your Carb for E85 How to Pocket Port a Cylinder Head Porting can increase the flow of either head but typically costs more than just buying better heads. Porting and polishing your cylinder heads will give your engine more horsepower and make it run more smoothly while increasing fuel efficiency. 5:1 w 64cc combustion chambers and Comp xe268 cam w/ 224/230 duration . my guess is around 300horse?? not sure on tourqe thanks guys _____ Pocket porting makes a big improvement. Cast iron oval port cylinder heads Pocket ported New valves and springs Roller tip rocker arms New push rods Chevy S/B Vortec #12558062 Cylinder Heads. 81 valve combination also helps. 975”t Int Port Location: Stock Intake Gasket: Fel-Pro# 1255 (. 7l Pocket Ported heads and a new cam Part 3 (Nov 99) Testing Aluminum Corvette cylinder heads Part 4 (Dec 99) Testing Vortec heads: 384HP! Part 5 (Jan 00) Pro Torker™ Small Block Chevy Vortec Cylinder Head #12410 DESCRIPTION RHS™ Pro Torker™ Small Block Chevy Vortec cylinder head, bare casting cast iron, 170cc intake runner, 64cc combustion chamber, straight plug 2. Fine-tuning was next on our list to see if we could push this bad boy over the 400hp mark. th350 w/ holeshot 2400 and a 12 bolt with 3. I haven't done any testing with the L30 vortec heads but can tell you on most 350 engines, swapping to the 350 vortec heads gains 40-70 HP depending on what stock head was on it before . at our shop we have an idea with a spare set of heads to pocket port, and given a choice between the vortec heads , and if forced to use an iron cast head theres zero question Id select the larger 215cc port heads on a 383 and just select the dual plane air-gap design intake, compression and cam selection, and header design , rear gear ratio, converter stall or manual transmission gearing to tweak the power band up Step 4: Inspect the cylinder head for cracks. I also like TIGHT lobe separation - they tend to scavenge better, but they take away from the idle and the top end and give you a peaky torque cruve. The exhaust and intake surface are flat and have been fully machined and will except a both Vortec style and a conventional style SBC The plan here is to do the heads and put in a cam (shooting for 350-400hp) and I’ve read that the vortec heads have a lift anywhere from . The SS numbers I found off the bat showed 222 cfm with pocket ported 164cc runners. At the end of the day pocket porting may not produce the fastest looking set of heads or the most photogenic but the results can be very satisfying. 02" Intake Valve and 1. 570" and . Carefully opening that area closer to the valve seat diameter can wake-up many heads from 15- to 35-overall horsepower. im looking to get 450 hp out of it do you think thats feasible with either summit or patriot aluminum heads? i'll be running 9. 7 Vortec Heads: ‘ 99 L31 heads with valve springs redone to . btw, 170 cc is the Vortec intake volume, not flow. The "bigger is better" approach espoused by old-school mechanics actually can The pocket-ported Vortec heads still suffered in low-end torque compared to the Corvette heads but gained an additional 13 top-end horsepower. 550 inch on Get a set of Iron Heads. Aftermarket guide plates and studs. The LS6 and the later LQ9-LQ4 heads used reshaped intake ports and D-shaped -- as opposed to oval-shaped -- exhaust ports for better flow: 200 cfm intake and 70 cfm exhaust for the 241's, and 210 intake and 75 cfm for the 243's. This head features 60/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with . 25534371 SB Chevrolet Bare Large Port Vortec Bow-Tie Cylinder Head $328. On a production head of either material, there is usually a large lip from the last angle created into the bowl that is left over from machining. Stage 2. angle milling, polishing or porting etc. We spent 8 hours doing pocket work on both the intake and exhaust ports just around the valve seat area. I haven't done but one back-to-back test with quench and it did seem tomake a noticeable difference. I have read Chevy High Performance's articles on Vortec heads. These Vortec Ported Throttle Bodies also feature our High Flow Throttle Blade, thinned throttle shafts and button head screws! Why purchase an aftermarket $395. 050 Bare heads are a great choice for porting projects, while Beehive and Dual spring equipped heads offer . TREperformance sells new AFR 220cc Eliminator 220 cc aluminum cylinder heads from Air Flow Research for almost any Chevy vehicle including the Camaro and Corvette, or any other L98 FBody 350, 383, 400, or 434 SBC, part #1110. On small-block heads, there’s a large pocket right below the rocker arm stud in the roof of the port. Heads are identified with the Bow-Tie logo on the exterior of the head below the exhaust flange and Vortec logo on top of intake port area. LT1, LT4, ZZ4, LS1, and Vortec blocks all use angle port heads which are not compatible with most of our header systems. having them ported and cut the valve spring pocket for a bigger lift cam will help in that department. It'll be cheaper, too. Ward Performance The pocket-ported Vortec heads still suffered in low-end torque compared to the Corvette heads but gained an additional 13 top-end horsepower. 50 257 . Wouldnt waste money porting them. 100% CNC Ported 1966 Oval port head; notice tapped bosses for spark plug shields. These heads require a 0. 2:1 . We also offer valve spring upgrades. 130: AFR LT Remember the old oval port heads, like the 049 heads. 7L(LS1), and 6. 025" 1. They're called D-ports because of the "D" shape of the exhaust ports, which is the part of the head that connects to the exhaust manifold or header. -1. 94/1. you can do the same thing with a decent set of truck heads and a pocket port job As such I'd reconsider Vortec heads for that particular application. 55-inch valves, 66cc combustion chambers, are drilled and tapped for screw-in 3/8-inch rocker studs (no guideplates), the intake port is drilled for either the typical Vortec patter or for a tall port conventional small-block intake manifold bolt pattern. 55 exhaust vavles. This procedure was seen as something of a black art, best left in the hands of the greatest of gearhead alchemists. (more gas and air equals bigger/more powerful explosion equals more torque and horsepower) Keep in mind that this is a very large project. O. com The Best head in this class was the later 292 Castings with larger runners, advantageous Port and Chamber Wall angles and favored by Jenkins running a 331ci SBC. No porting or polishing of any kind. At the end of the day, pocket porting may not produce the fastest-looking set of heads or the most photogenic, but the results can be very satisfying. It was a basic 350 chevy with 6" rods, manley forged flat tops, pocket ported Vortec heads, . No port matching, no pocket porting or blending. 7 Chevy truck #14102193 . 77559 Ported Jones Engineering 40/60 I-45 E-45 Alum, EngineQuest 167 23 Deg Out of Box Weingartner Racing Iron, EngineQuest AC200BS 23 Deg Out of Box Shaver Alum These heads feature a 75cc or 65cc combustion chamber with a 64cc exhaust port and a 3/4” thick head deck (ideal for nitrous or blower applications). 60: over the counter 23 degree, angle plug, 196 cc intake runner, Aluminum Tbi porting Tbi porting is located on the head and is a guide for unshrouding the valves. These blocks also require a steam release port on the radiator. Edelbrock has something for them. Using highly efficient port designs and state-of-the-art combustion chamber shapes, Edelbrock cylinder heads offer improved performance throughout the rpm range for great throttle response and top-end horsepower. Dec 16, 2017 - Yeah, we know—why bother with a 4. 490/. 95. However they only have like 235 cc intake ports vs 195 to 200 cc's for the P-P heads and yes, the exhaust ports are real small but do flow a lot better then the normal exhaust ports that peanut port heads have. 030-inch (that’s a total potential swing of 0. 3 heads. b. p/n 25534445 (bare) p/n 25534446 (assembled) The specs for the large port head is the same as for the small port head except for the port volumes: 215cc intake ports, and 77cc or 84cc exhaust ports, depending on the source. Pro Action GM LS3 Rectangle 5. Used to install single springs on GM Vortec head, without hardened spring seat. Exhaust: Hedman 1 5/8 in. This allowed higher compression ratios, resulting in more power and gas mileage, and reduced emissions. He pulled them off and painted them poorly. 7L (Vortec) GenX 215 Cathedral Port Cylinder Heads for GM LS1 • GenX 225 Cathedral Port Cylinder Heads for GM LS2 • GenX 235 Cathedral Port Cylinder Heads for GM LSX Part Type: Cylinder Head Application: Chevrolet Small Block, Vortec Intake Manifold Bolt Pattern Cylinder Head Material: Cast Iron Bare or Assembled: Assembled Combustion Chamber Size: 64cc CNC Machined Combustion Chambers: No Intake Valve Angle: 23 Exhaust Valve Angle: 23 Intake Port Volume: 170cc CNC Machined Intake Port: No Thus, Vortec heads became a good upgrade for 350 small block V8s making up to 400 horsepower. Or was it? Although the EFI 5. 015 head gasket) torker 2 intake, holley 750, 10:75:1 comp, comp cams hydraulic flat tappet . There was a previous mag article by Joe Mondello showing a full step by step work up progression on a oem vortec head from stock untouched, thu pocket port and on up to a fully worked port with large valves. OEM Vortec or aftermarket Vortec coppies Pocket Ported and cleaned up runners Contoured Seat Profile Valve Job (Light years beyond the archaic 5 angle valve job for extra efficiencies in the low camshaft lift area increasing torque via increased flow below . I dont have any numbers yet i just finished the truck up last week. e. 28 And (not porting related) advance your cam for more low-end torque, not retard it. You can achieve 80% to 90% doing basic porting from a Full Up Pro. 7 compression, 232 @ . Open or Closed Combustion Chambers The port and polish basically makes it easier for air/fuel to flow into the combustion chamber and gasket matching permits a greater volume. The GM Vortec Generation III blocks are classified as a 4. 3 is a very stout engine that most of have seen, but the compression is lacking at a tiny 9. 477/. Chevrolet 340 hp Vortec heads 8 bolts hold the intake on forged flat top pistons dbl chain Speed Pro cam, Eagle forged con rods, Eagle steel crank, performance cylinder heads, hardened pushrods, etc. Quote Reply Topic: porting the SBC Posted: September-25-2013 at 3:59pm D-Port heads are the most popular Pontiac heads. Aluminum heads require a thick composite head gasket such as felpro 1003 at . 9. The gasket cylinder bore, or fire ring, will likely be larger than the cylinder diameter. '14. COMP Cams valve spring seat-cutting tools allow you to machine the cylinder head for the correct diameter valve spring. Did my heads by Port Matching the Intake and smoothing out the curve. 2 1/2 rams horn manifolds (slight porting) flat top 4 eyebrow stock pistons. HEADS · any low compression open chamber head · no vortec heads or angle plugged heads · no closed chamber heads · may run dart head #10024361 or RHS head *64 cc min chamber volume - ford may run dart head #13310080 or wph #8245303 *60 cc min chamber volume · cannot alter anything on the dart heads other than the following: Re: How much rpm and hp can a 400 small block handle? i have a z28 140 off road solid mech cam int . According to the seller they were put on the engine and it spun a bearing as soon as they fired it. Most commonly they will appear between adjacent valve seats. Large port Vortec flow chart Stock, in this case, means GM's iron Vortec small-block heads, and by experienced head porter, we mean Joe Mondello. Heads are identified with the Bow-Tie logo on the exterior of the head below the exhaust flange and Vortec logo on top of intake port area. toll-free at 1-800-572-1963 Clearwater Cylinder Head, Inc. 00 throttle body? Edelbrock Performance Cylinder Heads are made in the USA, offering the best in quality and performance. I've finally run the car at the dragstrip. The 2. : 1. Vizard shows grinding a "bias" into the cylinder wall side valve pocket to facilitate swirl. Both labor costs will be about the same. By porting I mean removing the casting that shrouds the valves in the bowl and smoothing out the castings in the bowl and runners and polishing the "ski ramps" on the intake guides. RHS It has a 454 newly rebuilt engine with less than 1000 miles since rebuild pumping 550 horsepower, its . Pro-Port Raw cylinder heads are specialty purpose-engineered castings designed for the professional cylinder head porter and engine builder. These heads are machined for 3/8 in. Once this is done, the next step would be to blend the bowl area of the cylinder head, also known as pocket porting. This assures you of the highest value and quality in cast cylinder heads and aluminum cylinder heads for Chevy, Chrysler, Ford, Isuzu, Mazda, Nissan, Mitsubishi and Toyota vehicles. 7 TPI heads ? I have a set on a 1989 5. The peanut-port heads received a light surface and performance valve job, but were not ported in any way. I currently have those on a mark 4 block. 60" exhaust valve. 7 engines. Pricing is for traditional V-8 cylinder head pairs. 50-inch Stage 3 cylinder heads consist of a fully CNC ported head. In all, these RHS Ford heads get my top marks for easy porting and great results. Stock iron Vortecs peak flow at . 12480025 LS1 Cylinder Head (New) Tech Note: Similar in appearance to RPO LS1 head, special manifold must be fabricated, can be used with Racing Block 12480030, - height, width , attatchment, exhaust flange, exhaust port, dowel location are stock - Demensions and fasteners are metric - Valve angle revised from 15>11 degrees (smaller chamber) The short-block was originally fitted with a set of LS3-style rectangle port heads, but we since have converted to a set of smaller, cathedral port Trick Flow Specialties heads with a 225cc intake port volume. A quality valve job ensures that the airflow is properly directed around the valve and into the cylinder. The L92 heads are overkill on a 5. 8cc chamber, . 94 intake and 1. Ported heads are a wildcard, because there's no telling ahead of time what you'll get, or what it'll cost. Whole machine work with the cost of the valves and new spring seats cut for comp cam springs $650. The Vortec heads are a great deal but use a unique intake manifold design. 530" lift camshafts with out modifications. Cylinder head porting isn't what it used to be. 050 in. 8/5. 7 Vortec heads have 64cc chambers, you'll lose a little compression with those. The trade off of low/mid flow to get high lift flow was very interesting. 6cfm at . 5 so avoid them. then buy a bigger roller cam. The AFR Emissions Legal (versions with heat riser only, CARB EO #D-250-2), 190cc intake port small block Chevy cylinder heads are available in your choice of straight, angle, or L98 angle plug versions. 030 over with 100 domed pistons, vortec heads with pocket porting and bigger valves, it has a comp cams solid cam, roller rockers, chromemoly pushrods, dual plane intake and a 750 quick fuel carb, it is backed by a 4 speed transmission. Features an all-steel construction, easy to setup and adjust. 041 IIRC. For the record, pocket porting heads (reworking and blending the seats into the first 2 or so inches of the port) is all about focusing on Rule Number-1, to the exclusion of almost all else. Even better yet, fit the Vortec heads with 1. 041-inch head gaskets Fel-Pro 1003 head gaskets, Comp cams XE 268 cam, Edelbrock Performer RPM Vortec intake and Holley 750 cfm carb and 1 5/8 full length headers. 7L engine My A3 Motorsport heads DO have that bottom cut as part of the port pocket with no indications of ever having had the ring. 02/1. Therefore, you should put late-model Vortec heads high on your used, factory- head priority list. The Vortec heads differed from earlier designs by using center-bolt valve covers, and a different intake manifold configuration (8-bolt manifold instead of the previous 12-bolt manifold). 480 lift, performer rpm intake, holley 3310, 1 3/4" super comps. A Ported GM Throttle Body for the '96+ Vortec Truck 5. $688. The following is an article on porting mopar small block heads it shows the areas of porting and the flow bench gains in cfm for porting each area. The GM vortec 062-906 heads are better. Any one ever port a set of 5. PRC CNC Porting/Machining Service Includes: The piston swap increased the static compression from pathetically low to a more reasonable 9. 480. 5/162. AFR's 190cc Vortec Street heads are the preferred choice over reworked factory heads. 82 MPH. For those of you who might be unfamiliar with Mondello's work with Chevrolet, he Both the small- and large-port heads feature 2. They come with 2. so the cost for 40-50 more hp is about 2500-3000 more. All Pro Heads is the Industry Leader in Small Block Chevy Aluminum Cylinder Heads, (as well as the new Generation 3 and Mopar W9RP) , catering to the hard core racer always looking for the perfect design for a specific application. 494 adv 304? . GM changed the design for the Generation II LT1 small block with aluminum heads and reverse-flow cooling, meaning the heads were cooled before the engine block. These heads feature a 65cc combustion chamber with a 64cc on the better 23 degree SMALL BLOCK AFTERMARKET HEADS THERE'S ABOUT 5. 8? It's not a 6. We resize and reshape this area to a certain percentage of the size of the valve. 550: 65----235/161 68. 510 lift. they flowed 269CFMin and 187 CFM ex with a little pocket porting, i doubt they flow 280, because the intake valve is just to small, but cut them out for big valves and 280cfm could be possible. The exhaust and intake surface are flat and have been fully machined and will except a both Vortec style and a conventional style SBC A Ported GM Throttle Body for the '96+ Vortec 4. 14 1. After the port work was done, the heads flow 271 cfm at 0. 00 pm so students can get dinner at a place of their choice. Instead of spending hundreds on upgrading the stock Vortec head to run higher lifts(new springs, retainers, spring pockets), larger valves and and flow 11. UnderCover cast iron cylinder head modification, acid porting vortec cylinder heads & manifolds. Newsflash: Not everybody wants or needs a 6. Pocket porting refers to cleaning up the port runner area approximately one-inch before the intake or exhaust valve seat. you can do the same thing with a decent set of truck heads and a pocket port job That combo had 11:1 compression, 64cc heads, iron GM just pocket porting, used LT-1 steel crank, pink rods, TRW pistons, Victor Jr intake, Barry Grant 750 double pumper, General Kinetics solid lifter cam (special), but about . 530" lift camshafts with out modifications. 7 CHEVY 350 VORTEC 906 CYLINDER HEADS 1996 - 2002 SBC TRUCKS VANS NO CORE One pair of assembled 906 Vortec heads, lightly pocket ported. 50 heads-Competition 3-angle valve job-Mild pocket porting and gasket matching-"Z28" style valve springs good for around . 0 Vortecs have 58cc chambers but don't flow anything like the 5. That’s where a little bit of pocket porting work and radius work can have a measurable effect on power – if performed correctly. Effective on purchase made on or after January 1, 2010, AFR warranties AFR aluminum cylinder head castings for the lifetime of the product with proof of purchase to the original purchaser. No performance enhancing of head Many people choose machine cost and do a stock balancer over the cost of something like fluidampr, ati, etc. 50 in. Exhaust ports accommodate a standard Chevy pattern only. 120” thick) or OEM type Exh Valve Dia. Heads are assembled with new stainless 2. Recommended for street, towing, or street/strip engines from 350-383 cubic inches, operating up to 6000 RPM. Trey "The early bird may get the worm, but the Cylinder Head Porting. 0L. 060" bore X . To represent an aftermarket head situation I ported a set of a well known brand of heads that ended up at about 185 cc port volume and 280 cfm at 0. The top head is the 'lower horsepower' version (300hp and under) used on 67-68 327 applications with 1. The only thing about aluminum heads is you must zero deck the block to get proper quench at . 6. CBN milled to ensure straightness and correct RA surface finish. Additionally, valves, guides, valve seats, valve springs, retainers, locks, studs, guide plates, and valve seals Subaru Cylinder Head Upgrades admin 2020-11-23T22:30:37-05:00 High Performance Porting, Valve Guide Upgrades, Spring Upgrades, Valve Jobs & More For Subaru OHC, EJ20-25 DOHC Cylinder Heads WHETHER YOU’RE RUNNING A ROAD RACE, DRAG RACE, OR STREET RACE HEADGAMES CAN PUT A RELIABLE HEAD AND CAM PACKAGE TOGETHER FOR YOU! Pocket Ported under valve seats. They are gen v rectangle port. Part Type: Cylinder Head Application: Chevrolet Small Block, Vortec Intake Manifold Bolt Pattern Cylinder Head Material: Cast Iron Bare or Assembled: Bare Combustion Chamber Size: 64cc CNC Machined Combustion Chambers: No Intake Valve Angle: 23 Exhaust Valve Angle: 23 Intake Port Volume: 170cc CNC Machined Intake Port: No With just bigger valves and a simple pocket porting job, those with relatively little porting experience achieved favorable results (shown later). 478/0. In the "Part IV" story (Dec. im looking to get 450 hp out of it do you think thats feasible with either summit or patriot aluminum heads? i'll be running 9. The RHS® Pro Elite™ series of CNC-ported cylinder heads is designed for racers who want the absolute maximum engine performance. 349/2. Use a Scotch-Brite pad or 80 grit sandpaper to scrub the area where the cylinder head mates with the intake gasket down Pro Action GM LS3 Rectangle Port Aluminum Cylinder Head - Assembled w/ . 02 swirl polished intake valves. I have a 355 SBC, speedpro flat tops, pocket ported and shaved double hump heads (62. Coming from the small block world I'm extremly unsure on the specs on this. Leave some aluminum there for anti-reversion. 0L H. All machine work performed on the latest state of the art The iron Vortec heads are certainly less expensive at only $400 for the pair versus the Summitt heads at $800 per pair. 73 and Don't fall into that old trap of matching the exhaust port to the gasket. there are nice set of heads! that 427 was MEAN! Nearly all cylinder heads will respond well to a “pocket porting” and quality valve job. 020" intake/1. RHS The head has screw in rocker studs P/N 12552126, large valve spring pocket machining, and will accept up to. Basic Package Components . Cylinder Head Bolt Kits GenX 255 Square Port Cylinder Heads for GM LS3 Valve Cover Spacers GenX 205 Cathedral Port Cylinder Heads for GM LS 4. Much like GM’s rectangle-port heads, these unique castings incorporate offset intake rocker arms for improved port architecture and a reduced pushrod pinch area, with peak flow numbers ranging between 320 to 370 cfm. headers and Borla XR-1 mufflers Distributor: HEI Comp. Not just anything would do here. Recommended for street, towing, or street/strip engines from 350-383 cubic inches, operating up to 6000 RPM. th350 w/ holeshot 2400 and a 12 bolt with 3. I agree I had both sets of heads in my garage and I ended up putting $500 into the vortec heads to get, new valve springs and retainers, get the spring seats cut, valve guides cut for higher lift, screw in rocker studs, and pocket ported. 045". youtube. It features raised runners that closely match the port shape and location of these heads and is the best choice for racing classes that prohibit modification to The knowledgeable staff at CCH is happy to help you find the Vortec cylinder head that is right for your engine. The best advice here is to clean up and equalize the ports so they have the same height and width. 301/2. Open Motor: Unaltered OEM production cast iron block and heads only. You won't get your money back out of iron heads if you put a ton of money into machine work You cant compare ported and unported heads against each other. 450 to . CNC Ported Heads. These heads require a 0. Recommended for street, towing, or street/strip engines from 350-383 cubic inches, operating up to 6000 RPM. Chamber work: The 081 (centerbolt valve cover) and the 601 head are the ones that need the most chamber deshrouding. I had a set of 820's before that went on a 427, and i flowed them out with stock size valves and three angle. 94 AFR's 227cc "Race Ready" and "Competition" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. 090”w x 1. The RPM's you'll be turning will not complement the Vortec's capabilities IMHO. They'll make as much power as the E-Tec. In stock form the heads flow as well as many good aftermarket heads for the small-blocks from GM and Ford. 1 intake mods New member here, but I have over 40 years of building up everything from Go-Karts, Mini Bikes, Street/strip cars, drag cars, drag, lake, and circle boats, and airplanes (yeah the ones that are flying above your head, mebbie even now). $250. 050 offset intake rockers for drag race only Cylinder Head Porting. Utilizing innovative design features, modern engineering methods and precision CNC-machining, Pro Elite™ Cylinder Heads are second-to-none. 50-inch valve small block Chevy heads. However grinding too far creates a hole. The Mast cylinder head catalog includes a comprehensive lineup of 11-degree cathedral-port castings ranging from 215 to 265 cc. Box: 217 , New Carlisle , OH 45344 Phone: 937-846-1333 Email: info@profilerperformance. 3L V6 engines. 3:1. 02" and 1. 8L/5. 3L/5. Each students work will be flow tested. All American Manufacturer of Racing Cylinder Heads and Intake Manifolds Pro-Filer Performance Products P. Exceptions allowed: Unaltered Vortec heads. The 92-93 intake manifolds do not have the fuel rail crossover in the front like the 94-97 intakes, however the 94-97 intakes can use the 92-93 fuel rails. 73 and Inside the pocket of the intake has a ridge that produces a better swirl of air flow and a 1. Edelbrock has something for them. 0L. No aftermarket heads allowed. We tested the World 305 heads on our dyno mule along with the standard Victor 305 heads on a 350 You will find lots of hate on this one. See more ideas about automotive mechanic, ls engine, cylinder head. Turn on the motor, and set the control valve at a test pressure such as 25", and record the amount of flow. Just an opinion. They are the pre-Vortec 76cc swirl port heads . Our stage 1 porting service will include the re-use of the stock vales. If you CC that port it will be right around 238cc. 7's. If you decide to go crazy like I did, grinding to intake pushrod lump gives you something. 50 . On a new set of BRODIX cylinder heads there should be a red tag tied to one of the valve springs on each head. Contact Joe Mondello and buy a porting Kit. The cam and lifters your looking at is only $90. Pocket porting is porting the area under the valve seat. We also do 1,2,3,4,6,10, and 12 cylinder engine head work. 100% CNC Ported Combustion Chambers . Hot Rodding a 5. All this big intake flow comes with the complementary amount of exhaust flow. 1 piece rear seal, valve cover screws thru center, specify mechanical fuel pump, 4 bolt mains Can replace a 350 5. Not compatible with self Stage 3 cylinder heads consist of a fully CNC ported head. 3l5. Updated June '07 — and were converted from 10" to 28". Cleaned up the Valve Pocket and Polished. 6-9. 02 1. "On late-model Chevy Vortec heads, you don’t want to change the shape of the port much. The head is machined for screw in rocker studs, large valve spring pocket machining, and will accept up to . 520”lift provided heads are good. 02: 1. 530" lift hyd roller cam yadda yadda. Much like GM’s rectangle-port heads, these unique castings incorporate offset intake rocker arms for improved port architecture and a reduced pushrod pinch area, with peak flow numbers ranging between 320 to 370 cfm. 50 exhaust while the bottom head is the performance version (325hp and higher) used on 67-68 327 applications with 2. Chevy Vortec Ported McCoy: N/A-N/A----266/200 75. If you want to keep the chamber wall from exceeding the cylinder wall, creating a ledge on the deck of the block, then stay within the scribe line by the appropriate amount. Combustion chamber modifications include - Unshrouding of intake and exhaust valves, blending the chamber surface into the entry angle of the valve seat and combustion chamber reshaping as necessary to promote more efficient combustion & flame travel. 020", pocket port job. Flow data based on Cylinder #1 intake and exhaust port. 200" X 2. The oval port head has 110-cc chambers, and the rectangular port head comes with 118-cc chambers. Regards, Lone Check 'em out. screw-in rocker studs, feature large valve spring pocket machining, and will accept up to. They definitely wouldn't pass an engine teardown, but very few competitors wanted to pony up the money for that kind of protest. edelbrock rpm intake manifold (vortec specific) carb base adapter for 4 barrel quadrajet stock 3896929 cam. Even ported and sporting no more than a 170-cc port, these heads crack the 300-cfm mark at less than 0. 2HP for the effort and the guides are beehived not wing shaped. 60" valves. then later if money butns hole in yer pocket, upgrade. 94-inch intake and 1. The stock lift is in the area of 0. They were put in over 95 percent of Pontiac V-8s from 1959-1979, with the most popular of these manufactured for model years 1967-1976. Plus BONUS INFO! David Vizard's Vortec video https://www. New Listing Yeah vortecs are quite the heads. The Vortec Intake isnt a must but is highly reccomended to see the total gain I know guys running vortec heads with regular sbc intakes port spacing is all the same design is a little bit different water ports are the same only structural difference is the vortec intake no longer has the 2 center bolts as the vortec heads no longer have the Up for sale are early 70s 72cc heads. The information on the tag will inform you of the seat pressure, open pressure, maximum valve lift recommended, type of cam to which the springs are matched (e. ok so im a big nut on small block chevy stuff i have an s10 with a 500hp SBC running 11. I'm building a pretty mild 350 i have a brand new gm goodwrench crate motor. A pocket porting job was part of building the cheater heads I used to produce. 490 . Additional power would be possible with porting, as the stock head flow was certainly limiting power of our 461 (. i just had my heads redone by a local shop, they are '99 vortec heads, now have 202/160 valves, milled . Chevy 3917291 Cylinder Heads Camel Hump Sbc Fuelie Hardened Seats Pocket Ported Trickflow Genx 205cc Gm Ls Vortec Fully Cnc Ported Cylinder Head 4. 6395. 3. 305 ho heads. Combustion chamber modifications include - Unshrouding of intake and exhaust valves, blending the chamber surface into the entry angle of the valve seat and combustion chamber reshaping as necessary to promote more efficient combustion & flame travel. If you already have the heads thats free. I would bowl/pocket port the heads regardless of what oval port design they are. 60 polished Large port Vortec head. a. Please contact Clearwater Cylinder Head Inc. 500” Exh Port volume: 65cc When these blocks are used in a conversion, the torque converter or clutch components will need to be adjusted. Heads also list combustion chamber volume that helps estimate compression ratio. 100" longer than Stock Valve. 3. 500" lift with 239 cfm using a 170cc runner For my money, the absolute best head in your situation is a set of Vortecs. This head is available in four intake port volumes. 000/1. In column 5 blend guide boss web was worth 7. Some enthusiasts feared CNC porting ensures maximum consistency between each intake and exhaust port. Discussion Starter • #1 If your budget permits it, you could have your heads fully ported. 5 comp, Comp 282 solid 110 ls 106 cl 236@. Before you get to this point however, it's important to determine the rpm range of the desired power band and how you want to shape and position the torque curve to best suit your final application. This process is done at many machine shops and can cost a good deal of money. Ratio: 9. Cylinder head porting is more about how well air flows through the port rather than port size. This is the most rigid fixture you will find for doing cylinder head work on your vertical mill or surfacing machine! After 5+ years of sales around the world and many different styles of heads mounted, the CPM HF-2400 has proven to be the preferred setup for many shops! Vortec blocks all use angle port heads which are not compatible with our header systems. 600 exhaust valve with a smooth pocket to exit the gas quickly. This will allow you to install larger springs and hardened spring seats. 79% 1. Factory Chevy Heads Vortec Heads Vortec Bow-Tie Heads Bow-Tie Heads Double Hump Heads Open Chamber Heads 602 Crate Motor Heads 603 Crate Motor Heads 604 Crate Motor Heads Chevy 305 Cylinder Heads AFR's 190cc Vortec "Street" heads are the preferred choice over reworked factory heads. If I were going to the trouble of building a 377 I'd look for aftermarket aluminum heads with more flow in the 4 - 7k RPM's that you'll be using. Chevy 3917291 Cylinder Heads Camel Hump Sbc Fuelie Hardened Seats Pocket Ported. 94 intake/1. I know its cliche' but they provide more flow with less or the same port volume. The head is machined for 3/8" screw in rocker studs, large valve spring pocket machining, and will accept up to . 510 lift. 74 exhaust. All flow numbers for For Hemis Only Ported heads come from their Web Site updated March '13. 400" lift and 8. 4:1 MAX HP: 409 @ 6000 They ran through many combinations, but with pocket ported Vortec heads (otherwise stock 1. AFR's 190cc Vortec Street heads are the preferred choice over reworked factory heads. 100" longer than Stock Valve. I must have either mis-read or mis-remembered something. 022 lash, RPM intake, 650 dp and stock S/R torquer 2. I gasket matched the intake ports and blended them to the existing runner radius at the ports. 350 item 5 Chevy 3917291 cylinder heads camel hump SBC fuelie hardened seats pocket ported 5 - Chevy 3917291 cylinder heads camel hump SBC fuelie hardened seats pocket ported $375. com/watch?v=d Vortec head pocket porting. definately leave port smaller than the gasket in my experiance anyway with no flow bench on turbo style heads the exhuast side is where the kaw 2v heads tend to benefit most since intake is force fed anyway running a size over on exhuast valve with the d shaped port and stock Aluminum Cylinder Head & Manifold Warranty. com, the official website of Sport Truck You can get a set of 088 gm heads. The Vortec heads, the ported heads and the PolyQuaded Arao four valve heads were all run on the same short block. 480 lift, performer rpm intake, holley 3310, 1 3/4" super comps. 60 Set Up For Hydraulic The RHS® Pro Elite™ series of CNC-ported cylinder heads is designed for racers who want the absolute maximum engine performance. Sometimes a full race port wont work well on teh street as most race engines dont have to operate at part throttle very often. Heads: GM L31 Vortecs, pocket-ported, with 1. 530" lift camshafts without modifications. 95 25534431 SB Chevrolet Complete Large Port Vortec Bow-Tie Cylinder Head $499. 00 See full list on crankshaftcoalition. You sure will learn a lot. O. One of the other major changes was the distributor. Heads are machined with new thick wall valve guides. Ported the exhaust and Highly Polished it. These cylinder heads were first used on 1996 trucks with fuel injection, RPO L31. That combo had 11:1 compression, 64cc heads, iron GM just pocket porting, used LT-1 steel crank, pink rods, TRW pistons, Victor Jr intake, Barry Grant 750 double pumper, General Kinetics solid lifter cam (special), but about . If I were you, I would skip on the E-Tecs and buy a set of Vortecs, and have them pocket ported. 4:1 intake: performer rpm vortec carb: holley 750cfm cam: comp cams xe 268h duration: 268/280-224/230@. '99), we tested the Vortec heads before and after porting and saw a 13hp gain with no substantial increase in torque. The GMPP head (PN 12363400) with 300-cc rectangular intake ports (left) performs very similarly to the oval port head (PN 12363392) with 290-cc intake ports (right), if both have the same compression ratios. This is the most crucial area of any cylinder head. Cam: compcams XR264HR #8-501-08 GMPP Roller lifters #12499225 Melling double roller timing chain Est 9. These heads are fully CNC ported and have our priority racing valve job. Just got done porting my vortec 062 heads. AFR 190cc SBC Street Cylinder Head The Small Port, High Velocity Torque Monster. com Vortec heads are really a good design from the factory but they don't flow as much air as they could for decent power. 02 heads. 57 stainless steel valves. lift camshafts without modifications. A thin shim gasket will fret the heads due to cast iron and aluminum having different expansion rates. david ahluwalia · Registered. My D3xx 4V heads have this bias cast in. In fact, if you’re ready to replace a worn out or cracked cylinder head, you won Paired with a decent cooling system, the Vortec heads will be as dependable as any cast iron head that came before it and will increase the over-all performance of your engine. Fig. 525 218 / 228 heads: gm l31 vortec w/pocket port compression ratio: 9. 550: 65-----268/164 61. If you are looking for a performance upgrade for your engine, porting and polishing your cylinder The CNC-ported LS9 heads blend the engineered strength of the LS9 cylinder head design, which is constructed with A356T6 aluminum alloy, with the airflow enhancements provided by GM's extensive testing. When we began to remove metal from the bowls it became obvious why it s a good idea to first practice In this video I show how to port Small Block Chevy cylinder heads from a 98-99 Vortec motor. . Two myths arose from this era of ignorance regarding port flow. Used Vortec Single Rhs Sbc Bare Head 12407 Racing Head Service. Edelbrock part #2814 Super Victor Vortec Bowtie intake manifold is designed specifically for use with GM cast-iron Vortec Bowtie cylinder heads #25534351 (185cc) and #25534371 (215cc). I could only find this photos of a #193 that was pocket ported . 6 or 1. The problem area is the valve stem seals and the extended guide. 00 item 6 NEW 5. hydraulic roller, solid, street roller, roller, hydraulic), and the installed height of the head. Don't fall into that old trap of matching the exhaust port to the gasket. 525 / . 600 lift with the flow curve flattening out from there on up. pocket porting vortec heads