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Thread: 155 mm vs 160mm

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    RxPneco's Avatar
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    155 mm vs 160mm

    Well guy am trying to figure out witch is best for me I have. 160mm pump witch is working great off the line is hard to beat but I think is taking a lot of mile off my top end sow am thinking of putting the stock 155 with the Solas 13/22R what do u guy think


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    Kristian Keppel Waterholics's Avatar
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    Quote Originally Posted by RxPneco View Post
    Well guy am trying to figure out witch is best for me I have. 160mm pump witch is working great off the line is hard to beat but I think is taking a lot of mile off my top end sow am thinking of putting the stock 155 with the Solas 13/22R what do u guy think
    Try putting back on the 155mm and repitching to a 14/25 or so. If i'm not mistaken you have a stage 2 on an FZR.

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    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by RxPneco View Post
    Well guy am trying to figure out witch is best for me I have. 160mm pump witch is working great off the line is hard to beat but I think is taking a lot of mile off my top end sow am thinking of putting the stock 155 with the Solas 13/22R what do u guy think
    I used to think I was losing speed with my 160mm 8 vane pump so I put the 155 pump back on with the 160mm wear ring and impeller and I didn't gain any speed with it. The only thing I gained was a whole bunch of cavitation.

    Another idea would be to run the TBM cone/pump stuffer with the stock pump
    http://www.4-tecperformance.com/inde...oducts_id=1571

  4. #4
    RxPneco's Avatar
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    Quote Originally Posted by Waterholics View Post
    Try putting back on the 155mm and repitching to a 14/25 or so. If i'm not mistaken you have a stage 2 on an FZR.
    .

    No I don't have a stage 2 I have a stage 3 with a H1 and I just did my piston upgrade and rods am getting my riva computer this week Sow I just wanted to no if I should stay with the 160 mm or bring it back down to the 155

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    RxPneco's Avatar
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    Quote Originally Posted by Green Hulk View Post
    I used to think I was losing speed with my 160mm 8 vane pump so I put the 155 pump back on with the 160mm wear ring and impeller and I didn't gain any speed with it. The only thing I gained was a whole bunch of cavitation.

    Another idea would be to run the TBM cone/pump stuffer with the stock pump
    http://www.4-tecperformance.com/inde...oducts_id=1571
    have u try the tbm

  6. #6
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    I always found the 8 vein pump to be the same speed as the stock yamaha pump. had a 14 setback and it was a few tenths faster, on the gpr anyways.
    ? Are you saying that the 155 pump with the 160 prop and wear ring caused more cavation than the full 160 scat 8 vein pump wear ring and prop but same speed.

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    philip_gpr's Avatar
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    With that much boost I would think

    1) the 155 mm OEM pump will start having pieces break off the veins in a very short time period

    2) a larger pump will cavitate less (Scat 160 mm or Seadoo 159 mm)

    3) an impeller with more blade area will cavitate less. To increase the blade area you can use a Skat swirl or Skat long blade design and/or use a larger diameter impeller (159 or 160). Another choice is to use a twin impeller.

    4) impeller design has a larger impact of top speed than impeller diamter. Scat swirl impellers typically have a lower top speed. Solas Dynafly and Solas 4 blade Concord impellers typically have a higher top speed

  8. #8
    Stick with the 160. It's all about setting up your pitch to get your speed. I could run close to If not at 80 if took some pitch out, but don't mind staying away from the limiter. You will likely burn out the 155 unless you try the dual prop. If I was going vipec and h1 I would be running 160 and trying the dual prop 160. Why have the power if you can't hook it?

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    Quote Originally Posted by Doug78 View Post
    Stick with the 160. It's all about setting up your pitch to get your speed. I could run close to If not at 80 if took some pitch out, but don't mind staying away from the limiter. You will likely burn out the 155 unless you try the dual prop. If I was going vipec and h1 I would be running 160 and trying the dual prop 160. Why have the power if you can't hook it?
    Doug, I noticed in your sig that you're turning a 160 13/23 @ 7950. Is that with the stock pump or a 160?

  10. #10
    160 liner and impeller with the stock 155 pump behind it. I seem to turn it easier than most but it's chilly up here in Canada and maybe water temps on the west coast are colder.

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