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Old 09-21-2021, 08:06 AM
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Location: Gilroy, CA
Cobra Make, Engine: SPF 2291, Whipple Blown & Injected 4V ModMotor
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Quote:
Originally Posted by blykins View Post
Guys.....

This is not an Edelbrock issue.

The Edelbrock head out of the box is a very low performer, that's why we used to have them CNC ported. In addition, a 3/8" stem valve makes for a heavy valve that also obscures flow.

When specialty head shops provide CNC ported heads, they are ordered in bare castings so that the guides and valves can be custom fit for the application.

If you have 11/32" valves, *these are not Edelbrock guides*.

+1 on what Brent said. This looks like an 11/32 valve stem in a ⅜ guide. This is very likely not a wear problem as much as it is a parts mismatch problem.


Ed
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