Can a cast iron cylinder head be used?

Can a cast iron cylinder head be used?

Some tracks only allow cast iron heads depending on the class. If we’re talking small block Chevys, some rules only allow heads with stock port locations and stock 23 degree valve angles. Others may allow any head configuration with raised ports and shallower valve angles.

What are the casting numbers for Cathedral port cylinder heads?

However, they are quite plentiful used and work with any bore size; search for casting numbers “852” and “706.” These heads came on low-performance 6.0-liter truck engines in two variations: “873” cast iron (1999–2000) and “317” aluminum (2001+).

When to use oval or rectangular engine heads?

Unless you are building a full-tilt race engine (which would probably use an aluminum head anyway), an oval port head might be right for you. If your engine will not spend much time above 6,000 to 6,500 rpm, the added flow given by the rectangular port will probably not be necessary.

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.

Some tracks only allow cast iron heads depending on the class. If we’re talking small block Chevys, some rules only allow heads with stock port locations and stock 23 degree valve angles. Others may allow any head configuration with raised ports and shallower valve angles.

However, they are quite plentiful used and work with any bore size; search for casting numbers “852” and “706.” These heads came on low-performance 6.0-liter truck engines in two variations: “873” cast iron (1999–2000) and “317” aluminum (2001+).

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.

Unless you are building a full-tilt race engine (which would probably use an aluminum head anyway), an oval port head might be right for you. If your engine will not spend much time above 6,000 to 6,500 rpm, the added flow given by the rectangular port will probably not be necessary.