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I have a pro design head with the 22 cc domes and was wandering if I could switch to the 20's and still run 93 pump gas. Cylinders are ported and no timing advance.

Posted
I have a pro design head with the 22 cc domes and was wandering if I could switch to the 20's and still run 93 pump gas.  Cylinders are ported and no timing advance.

sure you can run 20's..i ran 20cc's in death valley on pump 91..death valley is 500 feet below sea level.....with your porting youd be cool...but allways allways allways check your compression.....

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