L29 head porting

Author: dyln

August undefined, 2024

WebApr 6, 2024 · This is often called pocket porting and the area just below the 45-degree valve seat is where you can gain the greatest airflow … WebMar 15, 2013 · The 781/049 heads are probably the right answer but in my limited experience the late L29 heads can also be made to work well in torque-motor applications. The L19 peanut-port heads, if you've never seen one, are amazing for a late engine design. They're stationary-generator heads, really. The intake ports aren't even adequate …

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WebOct 27, 2006 · This is going to be a 489 CID MkIV with L29 heads, 10/1 cr, roller rockers, gear drive, Head and Main studs turning a 2.68 ratio on an airboat prop. Hopefully I can accomplish everything I need to do at 1500-4000 RPM, Thanks, and if you do have those retainers laying around?? S slow ride Registered Joined Mar 2, 2005 58 Posts #7 · Oct 27, … WebNov 8, 2024 · Stock valve sizes with only mild porting is impressive. I will see if I can find pictures of my 360 ported PP heads and post them up. L-29 461 BBC 11.10@118mph 9-30-22 10.65@125mph 406 with home ported Dart 215 heads. 10 sec. Vortec 062's 406 w/hyd. cam and stock rocker arms 11.16@118mph 461 BBC 8:1 compression with junk peanut … bpal wolf\\u0027s heart

Peanut vs Oval port, velocity, etc. - Don Terrill’s Speed-Talk

WebOct 2, 2024 · The L29 Vortec 7400. Chevy first released the L29 Vortec in 1996 as the sixth generation of their big block V8s. The Vortec 7400 is the successor to the fifth generation L19 454 big block V8. ... The same goes for the cylinder heads, porting helps but without going larger – and shedding the cast iron – your build will always be flow limited. WebSep 30, 2024 · Weight: 72 lbs •Highest grade of material used in manufacturing •Thicker decks for greater strength •Superior port finishes for increased flow •Improved flow design to resist cracking •Redesigned water flow for greater thermal conductivity •Hardened exhaust seats Busted Knuckles Registered Joined Dec 2, 1998 3,741 Posts #3 · Sep 5, 2024 WebMar 11, 2024 · No1. Stay with the 236's pp head 461 and add the 12 to 1 pistons. No2. Go with the new Hyper piston 468 with ported 360's pp heads and a roller cam. No3. Go with the other 468 that can be 12 to 1 or 10 to 1 pistons and use either. fully ported 781's or run my 990's with the big roller cam setup. bpal witches lace

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WebSep 14, 2015 · The L29 454 was originally rated at 290 hp and 440 lb-ft of torque thanks to a combination of fuel injection, large oval-port heads (to replace the peanut ports used in the previous Gen V motors) and a slightly higher static compression ratio. The heads used on the L29 combined the large oval intake ports with small (100 cc) combustion chambers ... bpa manufacture \\u0026 trading company limitedWebJan 30, 2024 · The large oval port design flows better than any factory oval port head. If you are looking for a good head to put on your tow rig to help you haul the load, then the L29 Vortec big block head will do the trick. Sold as bare castings. For use on 1991 and later Gen V and VI engines only. Price: $629.95 Price is per head.” bpal wolf\u0027s heart

"I have some facts regarding the 98 L-29 Vortec heads. Some say they are good some say they are junk. Here are the facts that pertain to my project. Of course the flow numbers will be different from one flow bench to the other but what’s important here is what’s the before and after flow numbers. " - L29 head porting

L29 head porting

GM 7.4 Vortec Ultimate Engine Guide - Specs, Problems, …

WebCylinder Head Flow Data At 28" H2O Chevy Manufacturer /Part Number Port/Vol Intake / Exhaust Valve Size Intake / Exhaust Combust. Chamber Volume.100" Intake / Exhaust.200" Intake / Exhaust.300" Intake / Exhaust.400" Intake / Exhaust.500" Intake / Exhaust.600" Intake / Exhaust.700" Intake / Exhaust.800" Intake / Exhaust.900" Intake / Exhaust 1. ... WebSuitable for towing, the Chevrolet Performance Big Block Chevy L29 Vortec Cast Iron Cylinder Head was used on 1996-2000 GM trucks/vans/SUVs with 7.4L 454 engines. …

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WebMar 7, 2005 · these flow numbers for the L29 are worse than the worst peanut port heads. lift int ex .100 63 49 .200 121 91 .300 165 120 .400 198 133 .500 226 140 .600 242 142 the small block vortecs flow more than these piles of steaming poo. Now it appears I've built myself an expensive and slow boat anchor. WebJan 30, 2024 · 02-27-2012 06:22 PM. L29 ported Vortec heads, 279. L29 Vortec large oval port heads. Approximately 200hrs on them. Ported & flowed although I no longer have the spec sheet they flow roughly 286cfms. Don’t remember the exhaust specs but the Vortecs are known for their D ports so its already better than any other large oval production head.

WebNov 13, 2024 · “Cylinder head porting is something that you develop with repetition. You make subtle changes and you see if it makes it better or made it worse. Air has to pass … WebSep 21, 2007 · The L29 has a 9 blade declutching fan, with an additional electric pusher in front, external trans oil cooler, radiator engine oil cooler, massive radiator (this sucker is as fat as my T/A's 4 core rad, and wider). The L29's …

WebMar 10, 2024 · 9,272 Posts. #7 · Mar 5, 2024. Toss those L29 heads, they need too much work to make anything. I have a 461 7.8 compression in my Camaro I have been testing, I ported some 236 Peanut Port heads and this engine makes mounds of torque. The PP are easier to work on and will make more power everywhere in the power range. WebAug 25, 2015 · The 4-bolt main L29 also featured a boost-friendly 9.0:1 compression. Originally port fuel injected (Gen Vs featured throttle body injection), we replaced the Gen …

WebSep 29, 2010 · Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460) - Porting 429 heads - :-wink I'm rebuilding a '72 429 and was wondering about cleaning up the exhaust ports. I've …

WebMay 5, 2012 · The engine makes about 350 HP and 500 LBS of torque, and revs to 5500 RPM with the current tune, though all it does is make noise after 4500 RPM. According to my tuner, and to the desktop dyno, the heads and stock L29 intake are the bottleneck now that's stopping me from making more power. gympie flood photos 2022WebJun 16, 2024 · It's heads are true small intake port large ovals at right around 230 cc's or so! This said, the chambers are 100 cc's and a modern, "heart-shape". Get one's CR again up into the 9's and go. Now see if you want to run a carb. or an EFI? Add small tube, (1.75" dia.), headers and such too. bpam bond indexWebFig. 4.9. The Dart Iron Eagle heads with 345-cc ports work well on engines from about 556 ci and more. However, if I am using Iron Eagles, I prefer the 325-cc port head for most smaller displacement budget builds. Fig. 4.10. With a basic porting job, these 325-cc port 2.25/1.88 valve split Iron Eagles produced 370 and 282 intake/exhaust CFM at ... bpal winds of autumnhttp://enginebuilderprofessional.com/chevy_flow_data.pdf gympie flood mapWebNov 26, 2024 · (3) i can't see how a peanut port head could possibly have any advantage at all over an oval port factory head with a 250~ish cc intake port if a 290 cc edelbrock head is making more power than peanut port at only 3200 rpm. bpam all bond indexWebNov 25, 2024 · The L29 heads have a decent chamber shape and size, but the ski-jump in the intake port like the SBC swirl-port TBI heads. I guess some folks have had good results porting the OEM L29 heads; I can't say that I'm enthusiastic about that. I guess it's an option. gympie fishingWebNov 23, 2010 · (Run no more head than absolutely necessary.) There's been some pretty good combos posted by members of this board running the older peanut port heads, mid … bpam healthcare