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  1. #1
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    30cc heads on 225 Pro Max

    What's a good guess on the compression? Thanks Mike
    Cheaters never Win !!!

  2. #2
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    with a stock brain too much lol dont know myself i never ran anything over 32cc and promptly melted #5 on my first blown 225 my own it had 155/ 160 and this motor was 4 years old with oiler gone

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  4. #3
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    What kind of octane you have ?

  5. #4
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    Quote Originally Posted by tunnelmike View Post
    What's a good guess on the compression? Thanks Mike
    What's the exhaust port height. Then it won't be a guess ..

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  7. #5
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    30 cc will be 165 ish.

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  9. #6
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    Factory stock Pro Max 225. I couldn't tell you the port height. Going to clean up the exhaust ports and chest a bit over the winter. Going to delete the vst. Saw the 30cc heads for sale and wondered where that would put compression. After the mods are done the computer will be reflashed. Need the rev limiter gone anyways. Thanks for the help. Mike
    Cheaters never Win !!!

  10. #7
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    You will like that warmed up Pro Max.

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  12. #8
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    Quote Originally Posted by Capt.Insane-o View Post
    30 cc will be 165 ish.
    I agree with 1.0 gaskets about 160-165 with stock porting


    '95 STV "The Blue Goose"


  13. #9
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    Quote Originally Posted by tunnelmike View Post
    Factory stock Pro Max 225. I couldn't tell you the port height. Going to clean up the exhaust ports and chest a bit over the winter. Going to delete the vst. Saw the 30cc heads for sale and wondered where that would put compression. After the mods are done the computer will be reflashed. Need the rev limiter gone anyways. Thanks for the help. Mike
    from my experience 170-75 on a PMax with 1.0

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  15. #10
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    That's about where I'd like to be. 175-180 lbs. Figure with the clean up and compression it should do pretty good.

    Anyone ever put 26's ?
    Cheaters never Win !!!

  16. #11
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    26cc is 180 if the bores seal

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  18. #12
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    Agreed....I had 185psi on my 200 with 26’s and .75’s.....it was pretty worn out tho


    '95 STV "The Blue Goose"


  19. #13
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    Mach , what fuel did you run ? Was it worth it ?

    I don't want to have to run straight race fuel in this motor.
    Cheaters never Win !!!

  20. #14
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    I mixed 93 and 110 50/50. Ran good. EE carb stock porting went 116mph at River Ranch.


    '95 STV "The Blue Goose"


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  22. #15
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    That's pretty impressive !! 50/50 with 110 could still get pricey. Might look into the 30cc's
    Cheaters never Win !!!

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