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Thread: new numbers

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    new numbers

    well i couldnt wait no more went out today 55 degree air temp 61 degree water ski ran great. 8180/8200 rpm 12 psi a/f was 12.4 75mph thats with a 15/20 and 81mm ring. so what do you think i could get of it if i were to put a 15/22 on and ran same condition.


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    Quote Originally Posted by busa504 View Post
    well i couldnt wait no more went out today 55 degree air temp 61 degree water ski ran great. 8180/8200 rpm 12 psi a/f was 12.4 75mph thats with a 15/20 and 81mm ring. so what do you think i could get of it if i were to put a 15/22 on and ran same condition.
    15/22 would drop your RPM's some, giving you more speed.. BUT when the summer comes your gonna need a tweek to get your RPM's back up.

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    Quote Originally Posted by busa504 View Post
    well i couldnt wait no more went out today 55 degree air temp 61 degree water ski ran great. 8180/8200 rpm 12 psi a/f was 12.4 75mph thats with a 15/20 and 81mm ring. so what do you think i could get of it if i were to put a 15/22 on and ran same condition.
    couldnt you just tweak the 20 first then run again...

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    right, but if i leave the 15/20 on and my rpms drop to 8100 in the heat will or should i pick up more speed?

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    Quote Originally Posted by MARK_LEGG View Post
    couldnt you just tweak the 20 first then run again...
    well i want that to be my summer impeller. i have a 14/19 that impros bent to a 15/22. thats the one i bend

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    Quote Originally Posted by busa504 View Post
    right, but if i leave the 15/20 on and my rpms drop to 8100 in the heat will or should i pick up more speed?
    Not always.. A tweeked 14/19 isn't the same thing as a true 15/22, with a true 15/22 root angle you should gain speed.. I did

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    Quote Originally Posted by Alex13 View Post
    Not always.. A tweeked 14/19 isn't the same thing as a true 15/22, with a true 15/22 root angle you should gain speed.. I did
    so i should just wait it out till the heat wave gets here and recheck?

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    Stick your repitched 15/22 in it and run it. Only way to find out.

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    West Texas RXP skoepp's Avatar
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    Quote Originally Posted by busa504 View Post
    well i couldnt wait no more went out today 55 degree air temp 61 degree water ski ran great. 8180/8200 rpm 12 psi a/f was 12.4 75mph thats with a 15/20 and 81mm ring. so what do you think i could get of it if i were to put a 15/22 on and ran same condition.

    I would not bend your props right now. Your on the limiter right now so when it warms up your 15/20 might be perfect. I would use the 15/22 right now and tune it in with rings in the cooler weather your having now.

    I think you can pull the 15/22 pretty easy now. I am running a 15/23.5 right now with 82 ring in good air and i dont have the X upgraded charger.

    I would think your on the limiter big time right now with 15/20.

    Trust me, I have bent props back and forth and just trying to save your some time and effort as it will all change during in the summer.

  10. #10

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    Quote Originally Posted by skoepp View Post
    I would not bend your props right now. Your on the limiter right now so when it warms up your 15/20 might be perfect. I would use the 15/22 right now and tune it in with rings in the cooler weather your having now.

    Trust me, I have bent props back and forth and just trying to save your some time and effort as it will all change during in the summer.
    yeah, i know you are right.. i have the smallest ring i have in it... also was getting a bit of porposing riding like superman up top. had to move around the seat to get the right spot and it stopped. should i shim the plate?

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