When did the Vortec engine head come out?
When did the Vortec engine head come out?
For those who may be new to the game, the Vortec head was first introduced on the L31 350ci truck engines in 1996. Despite their journeyman use, these heads flow dramatically better than any other small-block Chevy production head, which makes them popular with just about anybody who wants to build a mild street small-block.
What kind of heads do you need for a 4.3L V6?
Stock 1987-1995 4.3L V6 heads have similar flow rates from idle to 4,000 RPM. However, a 4.3L V6 engine that is designed for racing will not be swirl port design with those those ski-jumps in the intake ports. Three years ago, I installed a pair of 1995 #10238181 L35-W heads on the engine my 1991 S10 Blazer LB4-Z engine.
What kind of cylinder head does GM 4.3 VTech use?
ProMaxx Performance designed/developed this cylinder head from the GM 4.3 Vortec factory casting. This head is a screw in stud cast iron replacement for stock applications.
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.
Stock 1987-1995 4.3L V6 heads have similar flow rates from idle to 4,000 RPM. However, a 4.3L V6 engine that is designed for racing will not be swirl port design with those those ski-jumps in the intake ports. Three years ago, I installed a pair of 1995 #10238181 L35-W heads on the engine my 1991 S10 Blazer LB4-Z engine.
How much horsepower does a Vortec bow tie head have?
The Vortec Heads come with various intake and exhaust valve sizes to complement the high-velocity port design and your performance needs. Vortec Heads outflow Bow Tie Heads right out of the box and are a 20 to 40 horsepower bolt-on increase over earlier cast iron small block heads.
What kind of cylinder heads do Chevy performance use?
Chevrolet Performance Small Block Chevy Cast Iron Vortec Cylinder Heads. America’s favorite high-performance cast iron small block cylinder heads offer big power and bigger value. Chevrolet Vortec Cylinder Heads’ fast burn combustion chamber and high-velocity ports combine to produce big horsepower.
How many versions of heads on an early 4.3?
The head will fit any 4.3L Chevrolet V6 engine. Look for the following casting numbers: Some of the 1993-1995 heads have pressed-in studs (adjustable) and some have screw-in studs (non-adjustable). You wrote that you do not want to up grade to more effecient heads so I will not go into that.
