How big are the intake ports on a Chevy small block?
How big are the intake ports on a Chevy small block?
The easiest way to reference any production head is with the last three digits of its casting number. The most famous heads are the 461 and 462 heads that offer 160-cc intake ports, 64-cc chambers, and 2.02/1.60-inch valve sizes.
How big are the intake ports on a 327 engine?
The bigger heads to follow were the “double-hump” heads championed by the mid-’60s 327 engines. The easiest way to reference any production head is with the last three digits of its casting number. The most famous heads are the 461 and 462 heads that offer 160-cc intake ports, 64-cc chambers, and 2.02/1.60-inch valve sizes.
What are the casting numbers for Oval Port Chevy?
If you are looking for a set of oval-port heads, look for the following casting numbers; 336781, 353049, 3992241, and 3993820. (Top) Oval-port heads are capable of flowing enough air to support around 600-650 horsepower in stock form. Rectangular-port heads (bottom), should be reserved for engines that spend much of their time at high engine rpm.
What’s the horsepower of an oval port Chevy?
(Top) Oval-port heads are capable of flowing enough air to support around 600-650 horsepower in stock form. Rectangular-port heads (bottom), should be reserved for engines that spend much of their time at high engine rpm. (Image courtesy of www.chevydiy.com)
The easiest way to reference any production head is with the last three digits of its casting number. The most famous heads are the 461 and 462 heads that offer 160-cc intake ports, 64-cc chambers, and 2.02/1.60-inch valve sizes.
The bigger heads to follow were the “double-hump” heads championed by the mid-’60s 327 engines. The easiest way to reference any production head is with the last three digits of its casting number. The most famous heads are the 461 and 462 heads that offer 160-cc intake ports, 64-cc chambers, and 2.02/1.60-inch valve sizes.
If you are looking for a set of oval-port heads, look for the following casting numbers; 336781, 353049, 3992241, and 3993820. (Top) Oval-port heads are capable of flowing enough air to support around 600-650 horsepower in stock form. Rectangular-port heads (bottom), should be reserved for engines that spend much of their time at high engine rpm.
(Top) Oval-port heads are capable of flowing enough air to support around 600-650 horsepower in stock form. Rectangular-port heads (bottom), should be reserved for engines that spend much of their time at high engine rpm. (Image courtesy of www.chevydiy.com)
Can a larger intake valve be added to a small block head?
The catalog states that the larger valve can be added with a new valve job, which is what happened on this head. The combination of the larger intake valve and a good three-angle aftermarket valve job produced some decent flow numbers.
Do you need 2.02 heads or 1.94 heads?
You do not need 2.02 valves to put a bigger cam in the engine. The 1.94 heads will perform well enough with a larger cam in the engine. For some reason beyond my comprehension, People think that you have to have big valves for performance. You don’t need those for a street engine.
What kind of intake manifolds do Vortec cylinder heads use?
This dual-bolt-pattern aluminum manifold will work with all Vortec cylinder heads P/N 12529093, P/N 12558060, P/N 19300956, P/N 19300995, P/N 19331470, or P/N 19331472 NOTE: Open carburetor spacer is not recommended for use with dual-plane intake manifolds.
The catalog states that the larger valve can be added with a new valve job, which is what happened on this head. The combination of the larger intake valve and a good three-angle aftermarket valve job produced some decent flow numbers.
You do not need 2.02 valves to put a bigger cam in the engine. The 1.94 heads will perform well enough with a larger cam in the engine. For some reason beyond my comprehension, People think that you have to have big valves for performance. You don’t need those for a street engine.
What kind of cylinder head did Chevy have?
The famous double-hump cylinder heads. Casting numbers 3782461 and 3782461X used 1.94 and 1.50-inch valves. These were commonly called “Fuelie” heads.
