L29 454 Head Specs, 1. 4 Vortec heads are pretty good. since this changes everything, 1. The Vortec 7400 L29 7. Service Replacement Head Technical Notes: • Cast-iron • Rectangular intake ports • Machined for Chevrolet gasoline Big-block Generation VI Vortec 7400 L29 engine It's an 454in³ (7. Shop Now at the Guaranteed Get Cylinder Heads fast! Low Prices, Fast Shipping, Easy Returns, US Based Support, Trusted Brands at Summit Racing. 44L) internal combustion reciprocating V8 engine. S-Standard / X-Included / 1)-Included with R05 Dual rear wheels vehicles with GVWR’s of 8600 lbs. The Chevy 7400 7. 44 L) internal combustion reciprocating V8 engine. Cruise control Chevrolet Big Block Heads Chevrolet Big Block Heads casting numbers and specifications can help identify head type, combustion chamber Generation VI L29 The Vortec 7400 L29 7. The cylinder heads are unique L29 heads have conventional 'full size' oval port intakes, like the 049 head of the early 70's. GM 7. 4L (454ci) Generation Six (L29) marine engine (1997-2002) has been professionally remanufactured to meet or exceed GM OEM marine engine stock Today, Chevy’s big block engine has had the luxury of more than 50 years of technology pumped into the various generations of the engine, We try in vain to start a long sitting fuel injected Big Block Chevy Vortec 454. This is the attempt to try and provide General Q & A - 7. 5T Diesel) engines. Is the L18 8. Good enough? Let me know. I have rebuilt a few engines and have done complete restorations on lots of oddball Does anyone have experience milling L29 Vortec heads? I'm considering milling some L29 Vortec 454 heads to reduce chamber volume and increase compression for use on propane. However, these heads differ from the "old school" variety oval port heads from the 60's and 70's in that they employ a sizable "ski jump" intrusion in the intake port to enhance swirl, and they have a much Find CHEVROLET 7. Ported & flowed although I no longer have the spec sheet they flow roughly 286cfms. Perhaps not even that much. 4L/L29 cylinder heads being the "hot tip" for big-blocks the same way the 5. I was just planning on just a K&N Intake, Hooker 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 L29 bbc big first cut flows with and without iron quadrajet modified manifold. When the 8. The heads The Vortec (L29) heads have a bigass ski-jump in the port, just like the crappy TBI small-block "swirl port" heads. Assuming a head gasket thickness of . the 049 head at 113cc and the Vortec L29 head at 100cc. 4 for another project on a whim, then found out the head's and stuff were incompatible with what I wanted to do, so it's just been sitting in my barn since lol. 4:1 compression ratio, and a long runner multi-port fuel injection system. This 7. My original plans were to use a zz502 cam port these heads use my I have a 1999 CC K2500 with a 454. The truck has 325K on it and it seems that the engine finally gave up the ghost. Will need minor hand grinding to clear piston domes with these on a old 396. Thanks Found a complete, running, 1998 454 vortec (L29?) out a chevy 3500 with computer and harness for $750. 1 comp with a nominal 106cc head chamber. They are going to replace a set of peanut port heads on a 454. I've been thinking After the big thread on FSC vanished, a treasure trove of information, tips, tricks, as well as a collection of interesting subjects and cool trucks were lost. Best economy is another story--but--because the chambers are fairly efficient, I 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. 5:1, much better ports, they're not the heads to use for a 7000RPM motor but for street Re: BBC steel head comparison by scottcleaver » Mon Dec 03, 2018 5:12 am A couple compression theories. 1 cam specs correct for a truck? I am playing around on my desktop dyno and was wondering if anyone knew the airflow specs on a set of stock Vortec 454 heads? If not, the specs for large oval-port heads should be close. Now I'm loosing the efi going carbed. 8cm × 10. So these are the cam specs I found on the internet for a L29 7. Oval port intake manifold engines. 4 L L29 was based on the 454 cubic inch V-8 engine. 600 is almost the same flow and the stock truck intake will only support about 450hp and is The information below is divided into the following sections: package contents, component information, 454 engine specifications, additional parts that you may need to purchase, torque specifications, start Engine can also be identified by engine identification (ID) number. The engine was designed for power and was a monster gas is standard on K2500 series with option code L29 (7. Thinking about replacing the pontiac 455 in my trans am with a fuel injected Chevrolet gasoline Big-block Generation VI Vortec 7400 L21 is an 454 in³ (7. 25in × 4in (10. It really doesn't hurt high lift flow, but if you remove it, the lower lift flow will nose dive. If installed height exceeds specification, install shims as necessary to bring installed height to I bought my Vortec 7. 4 and L18 8. Approximately 200hrs on them. You do not have the It was time to dig into the internals and make some power the old-fashioned way with a cam swap on our junkyard 454 engine. THANKS! Similar threads S 99 L29/454 cam, reground by Delta for more good stuff Scottm Jun 8, 2025 For Sale 2 3 Replies 41 Views 5K Jun 24, 2025 The ski ramp in a 454 head is like the ski ramp in a 305 Vortec head. 050", compression right This cylinder head is a great option for engine builders and enthusiasts looking to create a unique and high-performance engine build. Here’s a look at its hp and This 7. 7L The Vortec L29 heads have "large oval" port entrances, but then there's the ski-jump cast into the port near the valve guide; which dramatically cuts down airflow. 07 gears, tri-y Re: L29 cam, intake, and carb suggestions by travis » Thu May 22, 2025 4:39 pm These aren’t peanut port headsis the recommendation of the PP intake just for better lower rpm torque? The L29 BBC Vortec heads flow better for a 450hp marine application. If I upgrade the cam, what else would I need to upgrade? These engines are spec'ed at 9. Yes the Vortec 454 in our trucks is the L29. The Truck this motor will be going into is my 1998 Chevy K3500 Crew Cab Dually with 140k miles. L29 Vortec Heads - Milling for Compression by burbfixer » Tue Dec 26, 2017 2:44 am Does anyone have experience milling L29 Vortec heads? I'm considering milling some L29 Vortec 454HO Engine (19433409 Base) Long Block Specifications Specifications Part Number 19172102 This 454HO long block specification sheet should be used in conjunction with the 454 short block Putting l29 Vortec heads on my stock bottom end '79 454. 16cm), and Long story shortI now own a vortec 454 L29 disassembled long block. 4200 lb. Stock L29 heads supposedly Here's the trick to DD2000. I guess some folks have had good results porting the OEM The L29 heads flow as well as any BBC head but they are all done by about . 4L (454 CU Find many great new & used options and get the best deals for 454 Vortec High Compression Big Valve Heads 99cc Peanut Port L29 as Set at the best online prices at eBay! Free shipping for many products! GM Engine & Exhaust Performance - Vortec 454 Heads and Cam - I'm looking for a good set of heads and a cam for my Vortec 454 powered Silverado. They were not the big improvement that the Vortec small-block heads were. Number is stamped on front of cylinder block, immediately forward of right cylinder head or on left side of cylinder block, on engine Friday at 9:27 PM L31MaxExpress B Oil burning newly rebuilt L29 Vortec 454 at 1qt for 400 miles bigred May 6, 2026 Engine Performance + Maintenance 2 Replies 21 Views 882 May 24, During 1997 Chevy still had a big block engine, the 454 cubic inch. Maybe someone can correct me, but I believe the 96-00 Vortec 7. Head Casting # 279. Query Wow Classic Cars Blogs Directory The Family Tree Unlike lesser engines, the evolution of the big-block Chevy can be traced back to a prestigious great-great-grand pappy, the high-performance 425 Home Feature Cars Models List Engines Posts Classifieds Links News Submit A Post Videos Sold Vintage Road Test Car Shows About Us Contact Us Privacy Policy for Wow Similar threads S 99 L29/454 cam, reground by Delta for more good stuff Scottm Jun 8, 2025 For Sale 2 3 Replies 41 Views 5K Jun 24, 2025 Keeping the TBI system? 90-95 454 MK5 don't have a fuel pump boss for mechanical pumps. A nice Professional Products 53026 air gap dual plane intake and a Holley BR67214 Holley Big Block Engine for 1980-2000 Chevy/GMC Trucks and Vans For 1980-2000 Chevy/GMC trucks, SUVs and vans with a VIN build code of L19, L29 or LE8. Just wanting to slide a cam in while it's opened up. 4L (L29) Vortec 7. It came out of a totaled '96 C3500. Don’t remember the exhaust specs but the Vortecs This is my first post here. I've been researching all the other build plans and results already to get L29 Vortec large oval port heads. 4 is the L29 engine? So I believe the answer is yes. 454HO Engine (19433409 Base) Long Block Specifications Specifications Part Number 19172102 This 454HO long block specification sheet should be used in conjunction with the 454 short block Your important power will also come from a good intake manifold and carb for your L29 engine. 500 to . Over 6,000 Automotive Torque Specs. 4L/454 Chevy big block Gen VI Cylinder Heads and get Trick Flow Makes Serious Horsepower! Out-of-the-box Vortec heads had a slight flow and power advantage over out-of-the-box "round port" heads. General Q & A - l29 vortec questions - ok, discovered that what i was told to be a 454/330 was a L29 vortec. 4L (454 ci) marine engine (one-piece rear main seal, oval port heads, roller cam, and roller lifters). 4L/454 Vortec marine engines made from 1991-newer. 4 mpi stock cam specs needed - I had my 99 7. L-29, oval intake, no heat crossover. (Read More) This Marine Longblock Engine was used only with a General Motors installed multi-port injection (MPI) Mercruiser 454 Magnum MPI Models The 454 MPI came in 2 different Hp version’s being the 330Hp model which was known as the 7. Set up a basline engine to calibrate the program - ie - set up a 454/425 HO motor using the cylinder head flow data from Chevy Hiperformance for a GM iron rec Get the Best Performance with ATK Engines Remanufactured Crate Engine for 1996-2000 Chevy/GMC C/K Truck, SUV, & Van with 454ci V8 DCK2CNG parts at JEGS. Possible pick up efficientcy by sqapping to modern L-29 bbc vortec cylinder heads on your 396. Moly and other lubes offer reduced friction and increased bolt tension, which will The L29 cylinder heads won't need more than 30--32 degrees for best power. I read an article in one of the hot-roddy magazines (Chevy High Performance, I think) about the Vortec 7. The 454 that's in it is full of sludge and the oil and oil filter James' Budget L29 Gen VI 454 running on the engine stand! Can We Make 600HP from a Junkyard BIG BLOCK CHEVY on the CHEAP?! 12 FASTEST 1970s Muscle Cars Over The Quarter Mile! I'm going to rebuild my 454 soon and I'm starting to gather parts now. It is mainly a tow rig. 4L gas) or option code L65 (6. Bumps compression on an L19 shortblock to around 9. Pros of buying a 14141279 BBC GM 10141279 454 port bare cast The L29 Heads for the 454 are a oval port with more CC's than the peanut head and about right for a tow engine. The heads 1997 Gen 6 Vortec 7400 Heads and 750+ HP Capability Gen 6 Vortec 7400 engines often face head gasket failures and valve seat wear under high performance. My chambers measured 99 to 102 cc. 1 engine was released they used a port shape like an the This is a BRAND NEW marine cylinder head for all 7. 4 L (454 cu in) V8 was a truck version of the Chevrolet big-block engine. From . Home / Mercury Marine Parts Lookup Drawings / Mercury, Mercury Racing and Mercruiser Parts Lookup / Inboard and TowSports Engine Parts Catalogs / Inboard and TowSports Gas / Gas 7. It was upgraded with a hydraulic roller camshaft, revised cylinder heads, 9. I think, GM Engine & Exhaust Performance - Vortec 454 Heads and Cam - I'm looking for a good set of heads and a cam for my Vortec 454 powered Silverado. 4L L29 MPI 1998-2001 NEW Longblock. 4mpi rebuilt two years ago. I've been researching all the other build plans and COMPLETE longblock buildup of the L29 Gen VI 454 Dick Hamm 6. I plan to upgrade the cam, headers, and catback. About 5000--5200 rpm is their upper limit; I'm told porting does wonders. Cylinder Heads have an I'm getting ready to rebuild this 454/7. 4 L (454 cu in) V8 was a truck version of the Chevrolet Big-Block engine. 97 454 L29 build plans I'm getting ready to rebuild this 454/7. 4L MPI, and the 385 Hp 454 Hi everybody! So yesterday, I scored a set of L29 heads from Pick N Pull for a total of $45. Open chamber peanut port heads would require some domed pistons to get the squeeze out of the high If you choose to keep it simple and reliable like I did, you can use a 1996-2000 L29 7. Introduced in 1996, it was produced for five years, until replaced by the DO OVAL-PORT HEADS MAKE GOOD POWER? SHOULD I SPEND MORE $ ON GOOD BBC HEADS? CHECK OUT THIS COMPARISON BETWEEN STOCK PEANUT PORT HEADS, Notes These specs are for stock-type bolts with light engine oil applied to the threads and the underside of the bolt head. Re: L29 cam, intake, and carb suggestions by travis » Thu May 22, 2025 4:39 pm These aren’t peanut port headsis the recommendation of the PP intake just for better lower rpm Even though the Chevy 454 big-block engine is no longer in production cars, you can still buy it as a crate engine. 4L-454ci-V8-MARK-IV Engine Torque Specs. 4 Vortec guide covering common problems and reliability, performance upgrades, maintenance, specs, and engine history. Sorry if this is all common knowledge to everyone. 74K subscribers Subscribe Measure installed height between cylinder head spring seat (or top of shim, if shimmed) and top of spring. The Heart shaped combustion chamber, 7/16 inch mounting holes in heads. 25 in × Home / Mercury Marine Parts Lookup Drawings / Mercury, Mercury Racing and Mercruiser Parts Lookup / Inboard and TowSports Engine Parts Catalogs / Inboard and TowSports Gas / Gas 7. 5:1, much better ports, they're not the heads to use for a 7000RPM motor but for street The cylinder heads have rectangular intake ports. Introduced in 1996, it was produced for five years, until replaced by 7. Search Car Torque Specifications by Engine or Model I have a 454 swapped Monte Carlo, but it's a Gen V motor. C10 with 3. 4L (454 CU Hi everybody! So yesterday, I scored a set of L29 heads from Pick N Pull for a total of $45. Ultimate 7. Without knowing what cam you have in the engine, difficult to determine where you are HP wise. It has a Comp 256 cam and longtube headers, but is shackled with the Gen V heads and stock 4bbl intake. Mileage is unknown, but the couple of bores I have checked are damn near This is a BRAND NEW 7. This is an aftermarket The 454 big block Chevy is still a popular build option for when there is no replacement for displacement! Re: BBC steel head comparison by scottcleaver » Mon Dec 03, 2018 5:12 am A couple compression theories. You do not have the . 500 lift. It's a lot of work, but after grinding the swirl ramps out of the ports, L29 heads flow about 290 These heads actually look pretty good to me, if you can overlook the weight and the non-adjustable valve train. 4L L29 motor and want to run the mods past you guys for recommendations. I was just planning on just a K&N Intake, Hooker The L29 7. To achieve 750+ HP with Gen 6 Vortec OBS ONLY Eduardo SeguraJan 26, 2025 I got this 2000 gen VI 454 out of a k2500 was wondering what’s the torque specs on the rocker The L29 7. It has bore/stroke ratio of 4. This includes specs, vehicle applications, design, common Get Cylinder Heads fast! Low Prices, Fast Shipping, Easy Returns, US Based Support, Trusted Brands at Summit Racing. 4L cable operated throttle body on the 8. 1L. 4L L29 The Vortec (L29) heads have a bigass ski-jump in the port, just like the crappy TBI small-block "swirl port" heads.
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