When did Chevy start using Vortec heads?
When did Chevy start using Vortec heads?
1996
The Debut. From 1996 to 2000, GM truck and van 350 engines came equipped with L-31 Vortec cylinder heads.
What kind of head does a Chevy Vortec use?
The Chevy Vortec head is an excellent choice for a variety of performance and race applications. Since its introduction in the late 1990’s there have been a few “versions” of the factory Vortec head. We use the new, new Chevrolet produced casting for applications that require the factory Vortec head.
What is the part number for a Chevrolet Vortec?
The Chevrolet part number is 12558060. The new Mexican castings are good, thick heads and can be flat cut to the low 50’s without any issues. After our “UnderCover Porting” or SST Porting modifications, a modified Mexican Vortec head will flow the same as a modified non-mexican Vortec head.
When did the Vortec cylinder heads come out?
Vortec heads were designed based on the 1996 Caprice 9C1/Impala SS LT1 cast-iron head castings. The only difference is the water jacket revision so these heads could be used on conventionally-cooled small blocks.
What are the intake valve seats on a Vortec?
Vortec Intake Valve Seats and Combustion Chamber The intake valve seat of the Vortec head has a three-angle grind straight from the factory and the combustion chamber design is a radical departure from former GM heads utilized in the market.
The Chevy Vortec head is an excellent choice for a variety of performance and race applications. Since its introduction in the late 1990’s there have been a few “versions” of the factory Vortec head. We use the new, new Chevrolet produced casting for applications that require the factory Vortec head.
How big are the valves on a Vortec block?
There is no better way to wake up a small block with a set of Vortec heads and a performance camshaft! The bottom side shows the new stainless 2.02”/1.60” valves and a fresh surface job. This will ensure a good seal for the head gaskets!
What kind of combustion chamber does a Vortec head use?
Next, the Vortec head employs a small, 64cc combustion chamber. This is great for stock short block 350 engines like the Chevrolet Performance 290 hp 350 crate engine that uses a dished piston with a 76cc combustion chamber head.
Vortec heads were designed based on the 1996 Caprice 9C1/Impala SS LT1 cast-iron head castings. The only difference is the water jacket revision so these heads could be used on conventionally-cooled small blocks.
