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  1. Opel Engine Performance Modifications
    What is the formula for figuring out the valve lash with the roller rockers? I see here at the sight people have many different setting from 10 intake and 12 exhaust all the way up to 20. How do you figure out the definitive setting? In my case I have a 1.9 bored to 2.4 with the 30 over Chevy...
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