When did Chevy start using double hump heads?
When did Chevy start using double hump heads?
Heads with short double-hump casting marks were used in later high-performance SBCs. Most of these heads had accessory bolt holes and were identified with casting numbers ending in 186 or 492. They were used from ’68 through ’72 on 302 CI Z-28 engines as well as ’70 through ’72 in LT-1 350 CI Corvette/Z-28 engines.
What kind of heads did Chevys have?
Combustion chambers were typically 62 to 64cc and provided higher compression ratios. These heads were found on Chevy high-horsepower 302, 327 and 350 CID engines, including the fuel-injected 327s, from which they got the nickname “fuelie heads.”.
What kind of race head does a Chevy 350ci have?
10134363: “Bow Tie” aluminum race head. 43cc chamber, 2.02/1.60-inch valves. 18-degree, raised port. 10134354: “Bow Tie” Aluminum, 43cc chamber, 2.02/1.60-inch valves. 10147898: 1995 through 1998 350ci crate engines, 78cc chambers, 1.84/1.50-inch valves.
What kind of cylinder head does a Chevy Camaro have?
In addition to early heads, the 1986 and later Tuned Port Injected (TPI) 350 H.O. motors, such as the Pontiac Trans Am and Chevy Camaro, are worth having. These heads have chambers that look like they’ve inherited some smog-head characteristics, but they’re sufficiently removed to fall well short of that category.
Combustion chambers were typically 62 to 64cc and provided higher compression ratios. These heads were found on Chevy high-horsepower 302, 327 and 350 CID engines, including the fuel-injected 327s, from which they got the nickname “fuelie heads.”.
10134363: “Bow Tie” aluminum race head. 43cc chamber, 2.02/1.60-inch valves. 18-degree, raised port. 10134354: “Bow Tie” Aluminum, 43cc chamber, 2.02/1.60-inch valves. 10147898: 1995 through 1998 350ci crate engines, 78cc chambers, 1.84/1.50-inch valves.
In addition to early heads, the 1986 and later Tuned Port Injected (TPI) 350 H.O. motors, such as the Pontiac Trans Am and Chevy Camaro, are worth having. These heads have chambers that look like they’ve inherited some smog-head characteristics, but they’re sufficiently removed to fall well short of that category.
What kind of head does a Chevy double hump use?
We have a good supply of used ‘186 & ‘492 heads available with everything from “Undercover Porting” to CNC Sportsman Porting. Stock “double hump” heads flow 202 cfm intake and 141 cfm on the exhaust. If you must maintain a stock looking port, consider our “Undercover Porting”.
