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  1. #1
    ou812's Avatar
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    Riva sc wheel & power pipe combo

    I'm looking for some input on the gains I saw today with these mods added to my stg 1. The sound, I love! The extra torque, I love!

    Previously with the stg1 & stock prop & saw 71.4 @ 8200 rpm on 3/4 tank. The prop grabbed at 7500 rpm out of the hole & was strong all the way up! I had impros add some pitch to the stock prop & he gave it .040. I ran this prop 'cause I haven't picked up my swirl from him yet.

    Today on a very full tank it got 71.5 mph @ 8180 rpm & it would grab at 7760-7800 rpm on a new wear ring even. I'm assuming I gained some rpms on top with these new additions since the prop is taller now & i'm still near the same rpm as before. It's the pull out of the hole I'm wondering about. It added 300 rpm compared to before. For you RXP pro's, would a 14/19 spin like the repitched stock prop in this case? would a 15/20 do me right, now?

    I am very anxious to run that 13/18 swirl this weekend!!


  2. #2
    Site Admin Green Hulk's Avatar
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    I would shoot for a 15/20. It will be 1 mph faster than a 14/19 at the same RPM

  3. #3
    Moderator Insanediego Joe's Avatar
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    Quote Originally Posted by Green Hulk View Post
    I would shoot for a 15/20. It will be 1 mph faster than a 14/19 at the same RPM

    yep!

  4. #4
    ou812's Avatar
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    You guys don't know what yer talking about....

    Thanx for the info!
    You think the 13/18 swirl might be good at 14/18.5-19?

  5. #5
    Site Admin Green Hulk's Avatar
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    I would definately give the swirl a shot to see what it does. The 15/20's and 15/19 3 blades have been proven best with the RXP's though.

  6. #6
    Moderator Insanediego Joe's Avatar
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    The solas 15/20 is going to be faster than the swirl will be at any pitch with your level of modification.

    If your after acceleration and holeshot= swirl

    if you want every mph out of your modification level= solas

  7. #7
    ou812's Avatar
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    Thanx again guys...I'll have both props by the weekend!

  8. #8
    ou812's Avatar
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    Quote Originally Posted by Green Hulk View Post
    I would definately give the swirl a shot to see what it does.


    Thats what i'm thinking..If the 13/17.5 gave me 71.8 @ 8100rpm on 3/4 tank before it folded it should yeild the same top rpm @ more mph from straight from the box with the new additions, you think?

  9. #9
    Big K's son KeithKman's Avatar
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    Just don't have me ride it or it will go slower. lol.

  10. #10
    Moderator Snoman's Avatar
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    Quote Originally Posted by Green Hulk View Post
    I would shoot for a 15/20. It will be 1 mph faster than a 14/19 at the same RPM
    Even on a stage 1 Jerry???If so looks like ill be getting another impeller for
    the wifes ski...Damn i cant do that ..cant have her faster than me

    Scott

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