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Thread: 12/18 to 14/20

  1. #1

    12/18 to 14/20

    12/18 is what i have on my gpr1200 and have the power for a 14/20 but will i loose bottom end pull?


  2. #2

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    what mod ?

  3. #3
    150 psi heads
    Carbs modded
    [email protected] controller on yam 84
    Size c pistions
    Ported cyclinders
    Carbon tech reeds
    [email protected] ride plate and grate

  4. #4
    WATER WOODY's Avatar
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    Quote Originally Posted by 66V View Post
    150 psi heads
    Carbs modded
    [email protected] controller on yam 84
    Size c pistions
    Ported cyclinders
    Carbon tech reeds
    [email protected] ride plate and grate
    You mean Advent controller? Try the Yam 94, easier in the mid range.
    Whats your rpm's?

  5. #5
    Quote Originally Posted by WATER WOODY View Post
    You mean Advent controller? Try the Yam 94, easier in the mid range.
    Whats your rpm's?
    yeah thats it
    rpm i dont know but since i did all that work it kills a standed gpr now should i try a 14/20 as i have use it for wave jumping would this be ok?

  6. #6
    if your gonna jump and want very good bite/launch maybe try 13 on the leading.

    even tho your engine may pull this prop ok, it is more for mid and top end hit...

  7. #7
    WATER WOODY's Avatar
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    Try a 13/19 for big waters

  8. #8
    Thanks for your help Iv been try to get this info for ages

  9. #9
    philip_gpr's Avatar
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    yes if holeshot is important a true Solas 13/19 would be better

    if it is top end you want a Nujet 6.5 would be another good choice - it would be 1-2 mph faster

  10. #10
    Happily Self-Employed WFO's Avatar
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    need a tach to see where the rpms are first

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