How do you identify engine heads?
Cylinder heads may be identified by their casting number, located between #4 and #5 pushrods. General identification is as follows: 850-1100 heads have a heater tap at 90 degrees to the centerline of the engine. The space between the thermostat housing and the valve cover is small, at 1/16″.
Are Mopar 906 heads good?
While 906 heads do perform well when ported, the labor involved with hand-porting these heads, combined with the cost of new valves, springs, etc, has made it more economical in most cases to simply buy a new set of aluminum aftermarket cylinder heads.
Where can I find head casting numbers?
HEAD CASTING NUMBERS The head casting number is located on the top of the cylinder head. The valve covers must be removed to find the number. Keep in mind that if you remove the valve covers, new gaskets may be needed.
What do the numbers on a cylinder head mean?
This number is a representative figure of how a given head will perform on an engine by simulating how much air it can flow. For example, a Dart 24-degree, 308cc rectangle port Iron Eagle big-block head can deliver 325 cfm of air at 0.500-inch valve lift on the intake side.
How do you identify SBF heads?
If you have the valve cover off, look for any code number at either end of the head. If the head has been removed, the code will appear on the top, bottom or side.
What are Mopar 915 heads?
For a Mopar big-block, the ’67-only 915 head is the most desirable of all junkyard and swap-meet finds because of its good port design, larger valves, and closed combustion chambers. Earlier heads had the quench-friendly closed chambers, but small valves and ports, and later heads went to an open-chamber design.
What are 906 heads?
The ‘906’ heads were the standard head casting for all RB and B engines from 68-72(ish). They are good heads and were used on everything from 383 2-bbl engines up to and including the 440-6bbl engines.
Are 462 heads good?
They’re not a bad head, probably comparable to the L98 heads used on ZZ3’s & 4’s, but not as good as what’s available now. 462’s were one of the best flowing production heads. They were used between 1962-1968 on various HP versions of the 302, 327 and 350.
How do I know if I have a 400 small block?
How to Identify a Chevy 400 Small Block
- Open the hood and view the engine from the front on the passenger side.
- Look for the engine code. According to the Chevy-Camaro website, the code is located on a machined pad directly forward of the passenger-side cylinder head, on the front of the engine block.