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    skigolfnut's Avatar
    Join Date
    Jun 2009
    League City TX

    Piston wash and ADA head domes part II

    I finally got a better compression tester and ordered some new O-rings from American Packing down the street, for the ADA head,
    I went back in with Viton that have a good heat tolerance, all the way around,
    I put the stock head on first to get a base pressure for the piston rings,
    pto-120 --all within tollerance a little worn
    Now back on with the ADA head with the 23cc domes
    pto-149 ---seems low for those domes
    Now the 21cc domes in and got this compression
    pto-160--better that the 23's
    The mag piston is consistently about 8-10 lbs different, but that is the one that gets the hottest and wears out the quickest I am told,
    Who knows how many racers messed with these domes but 150-160 is OK by me,
    I am going to leave the 21cc domes in it for now, I have been running vp110 mix, I should be good,
    I will put the stock ride plate on, bump the drop nozzle up a bit so the nose doesen't plow so much and see where I am at,
    I have got to try and get my RPM's up,
    Thanks for everyons help and suggestions,
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