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Dome Size for 760 SJ motor

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  • Dome Size for 760 SJ motor

    What size domes would i need to use for the 84mm radier cylinder that i am using on a SJ?
    would it be 37cc? i want to use GT100 unleaded gas
    the site lists 38cc for 98 octane

    would i have to get the domes custom made?
    i realize porting, etc.. plays a part too
    i used 33cc domes when it was a 701 and that gave me 200 psi

    what psi can i run on the 100 octane with a 753cc??