WebJul 9, 2006 · The exhaust port is excellent--among the best of the GM ports. The intake port has a swirl-inducing "ski jump" that kills flow. The L-29 heads are good for about 20--30 hp over round ("peanut") port heads--and some of that increase is due to the higher compression because of the smaller chamber in the L-29 head. WebSep 30, 2024 · Anyway, been searching the web for info on a L29 head swap to a stock '79 truck motor and found most information here. What I can't find is any feedback or info on the EngineQuest CH-454C Vortec replacement heads. Was looking for some used cores but came across these brand new castings on eBay for $320 each. Hardly seems worth …
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WebJan 30, 2024 · “Vortec, L29, The GM Performance Parts L29 Vortec Big Block Cylinder Head was used on 1997-99 pick-ups with 7.4L engines. They are the best kept secret of GM. The small 99cc combustion chambers raise compression by 1 full point from the stock 119cc heads. The large oval port design flows better than any factory oval port head. WebOct 1, 2005 · The last generation big-block by GM (Vortec 454) leaves much to be desired when it comes to output. The Vortec big-block was gifted with a sequential port fuel … division\\u0027s u2
What is the difference between a BBC L21 and L29?
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 ... 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. ... Failing Head Gaskets. Another problem created by the engine’s poor cooling system is failing head gaskets. On many high mileage 7.4 Vortecs the head ... WebGoodwrench / GM Service Engines; Transmissions. Transmissions. Install Kits & Accessories; Clutch Kits; Transmission Controllers; Torque Converters; Parts. Engine Components. ... Big Block Cylinder Head Bolt … beberapa pdf jadi satu