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Thread: piston kit-- HP #'s

  1. #1
    Join Date
    Apr 2007
    Posts
    305

    piston kit-- HP #'s

    Fixing to put in a piston kit,ported head,cam..etc I have heard a 410 makes more HP than a 440 ,due tolighter piston..Anyways lets hear some of your combo's and hear some #'s or info you no to be true..thx in advance..

  2. #2
    Join Date
    Sep 2007
    Posts
    45
    i couldn't see it having more power but it would prolly rev faster
    02 440ex 12.5:1, stage 2, full t4 exhaust, choke removed, 165 main 42 pilot, ported

  3. #3
    Join Date
    Apr 2007
    Posts
    305
    what does yours make?Ever run any 450's?anyone else?

  4. #4
    Join Date
    Nov 2005
    Location
    MN
    Posts
    1,193
    a well built 416EX can make HP in the high 30's - low 40's

    Mine did about 38 on a dyno earlier this year. I also think there is HP left in mine due to porting, but I don't want to but a new head a open the engine up again.

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