Quote:
Originally Posted by Formula8
Lets not over complicate this. I did a search on this a while ago and the consensus was .060. Some have used up to .100. That said if a .060 produces approximately a 10psi increase using the 60psi spring, a .100 shim is going to produce what? 76 psi or so?
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Yup. I did a Melling 60 psi pump, dropped a hardened 1/16 thick washer (.06-ish) in the spring hole, and called it good. I did this for both of my current engines. I can't remember what the hole diameter was, tho. But use whatever is large enough to fit without getting stuck.