L29 454 heads

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August undefined, 2024

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 … WebJan 2, 2024 · If your 454 has the dished or the flat top pistons that is going to be the cork in getting to where you want to be at with any of these heads. The 049/781 large chamber heads in particular want the small dome 454 pistons to get the cr up in the ball park. Does your 454 have flat tops like the L2377 piston or a oem piston with a slight dish top.

CHEVROLET 7.4L/454 Cylinder Heads - Summit Racing Equipment

WebIn this video we get to hear the budget Gen VI L29 454 that James put together come to life. The factory zz502 hydraulic roller camshaft sounds great! Thanks... WebJul 1, 2015 · The 454 responded very well to the cam upgrade, as the peak numbers jumped from 376 hp and 482 lb-ft with the stock cam to 428 hp and 507 lb-ft of torque. hoffman\u0027s knife

Chevrolet big-block engine - Wikipedia

WebDec 6, 2008 · 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 … WebL-78: produced 1965–9, had a Holley 800 cu ft/min (23 m 3 /min) carburetor, compression ratio 11:1, forged pop-top pistons, aluminium high-rise intake manifold, steel crankshaft, … h\u0026r block pearland texas

Boneyard Boost: Vortech 454 - Street Muscle

WebAug 25, 2015 · As good as the $500 454 is, the stock L29 truck motor (circa 1999) was originally rated at 290 hp and 410 lb-ft of torque. In addition to the displacement, the 454 offered a number of desirable features that made it ideal for future forced induction. WebOct 2, 2005 · In the exhaust runner, a large bulge that shrouds the exhaust valve stem consumes about one third of the exhaust runner, making the port restrictive. We also … h \u0026 r block pentictonWebSep 26, 2016 · These engines were rated about 275-290 HP and about 390-410lb/ft. of torque. The 8.1L L18 engine was used from 2000 thru 2008 GM in the HD trucks. These were 496 cu. inch engines and were developed for better torque. This L18 engine in the truck was rated at 280HP but about 450lb/ft. of torque. h\\u0026r block people center

"WebJun 16, 2024 · Now, the L-29 engine. 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. " - L29 454 heads

L29 454 heads

WebAug 25, 2015 · As good as the $500 454 is, the stock L29 truck motor (circa 1999) was originally rated at 290 hp and 410 lb-ft of torque. In addition to the displacement, the 454 … WebAug 30, 2010 · 454 L29 Power Upgrade Jump to Latest Follow 1 - 3 of 3 Posts 4 454headache Registered Joined Apr 30, 2009 260 Posts Discussion Starter · #1 · Aug 30, …

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These L-29 big block heads have the BIG oval ports, a modern heart-shaped 100 cc or so combustion chamber that would work great with flattops. Drawback is the special (but readily available) rocker studs to convert to adjustable rocker arms. WebChevrolet Performance service replacement cylinder heads are direct replacements on most 1990-and-later GM Big-Block 454-cubic-inch and 502-cubic-inch engines. These cylinder heads meet GM’s stringent quality standards and provide excellent service and durability not found in used cylinder heads. The cylinder heads have rectangular intake ports.

WebJan 22, 2024 · 454ci/L29: Rated at 290 hp, The Vortec 7400 is the last-generation 454, with the same 4.5x4-inch bore and stroke as before. Like the Gen V, all engines feature four … 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.

WebDec 14, 2024 · The L29 heads are likely to be very durable--they've got hardened seat inserts on intake and exhaust. The casting is quite nice, minimal flash, etc., and the exhaust port is "said" to be good; although I haven't confirmed that. The exhaust valve guide boss looks pretty damn blunt to me. 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. …

WebThe 454 cubic-inch 7400 Vortec V-8 GM motor, which produced 290 horsepower at 4,000 rpm and had 410 pound-feet of torque at 3,200 rpm, was a smooth four cylinder without much difference between the top and bottom. It has an ohv configuration with two valves per cylinder and a bore and stroke of 4.24 inches x 3 on the intake side.

WebJul 1, 2015 · The 454 responded very well to the cam upgrade, as the peak numbers jumped from 376 hp and 482 lb-ft with the stock cam to 428 hp and 507 lb-ft of torque. An increase of 52 hp is always welcome,... h \u0026 r block penrithWebApr 11, 2008 · Columbia, MO, USA. They have about 230 cc smallish, real large oval ports, 100 cc fastburn, heart shaped chambers vs about 200 cc intake port peanut port heads w/ … h\u0026r block people centerWebMay 15, 2009 · Vortec L29 Heads 99cc chamber volume (small ovals) Further Head specs- Intake Port Flows CFM @ Lift 63 .100 121 .200 165 .300 198 .400 226 .500 242 .600 Valve Size: 2.065"/1.725" Chamber Volume CC: 99cc Spark Plug Position: Angled Spark Plug Size: 14mm Spark Plug Reach: 0.708" Spark Plug Number: RS12YC *L-29 exhaust port = 81.2cc. hoffman\u0027s lake worth flWebOct 2, 2024 · Head gasket replacements are pretty standard repairs, and upgrading to a slightly thicker gasket is the best way to solve the problem on the 7400 Vortecs. The biggest expense is going to be labor, as the actual repair itself isn’t too difficult, just tedious. 454 Vortec Reliability and Ownership Guide. 7.4 Vortec Reliability and Longevity h\u0026r block people center numberWebThese Chevrolet Performance 454ci/7.4L Engines are designed as a stock replacement, providing the big torque you need for pulling a trailer or other heavy loads, for 1980-2000 … hoffman\u0027s lathamWebIn this video James takes us through the motor build from short block all the way to long block. There is a lot of good info in this one, and if you guys hav... hoffman\\u0027s lake worthWebNew BRODIX ALUMINUM HEADS $499.49 BB CHEV 360cc ALUMINUM 'R $4,450 RFD 24-B (Non-MC) $2,595 NEW PRO FILER 12 Degree $2,750 Borowski CNC Ported RHS L $3,795 BRODIX BB/CHEV HEAD HUNT $1,695 BB/C 12 PRO-FILER ALUM RA Custom CYLINDER HEAD&INTA $3,995 BRODIX HEAD HUNTER 383 CN $10,000 M&M SB2.2 DRAG RACE … h\u0026r block peachtree city georgia