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  1. #31
    Monkeytunk's Avatar
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    Quote Originally Posted by Green Hulk View Post
    I tweaked it. You will ALWAYS get more speed out of a tweaked prop than you will an out the box prop. There is no "one size fit's all" impeller for every ski out there. This is why you must fine tune your impeller (tweak it) to get optimum results on your particular ski.
    Thats what I wish I knew how to do... I'm afraid to get in too deep with mods because I don't know enough nor have the resources to do that.


  2. #32
    Ricky Bobby's Avatar
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    Serious mods tends to yield significant results down low with this boat.That's why we all suffer serious cavitation issues. You will gain a bit on top but I'd doubt we will See 75+, I've also ran a small prop to 8700 wot with race fuel and 30 degrees across the board and i gained nothing significant over my race setup. However down low the holeshot cavitation was so severe that a mag pumP is a must have and proves extra thrust is available.. Best gains will be made by taking a balanced approach. Modifying this boat is all about how fast ya get to top speed not how significant the top end speed gains are with each mod. You may be happier with radar runs than a gps. You will see gains but 75mph with no cavitation will be a serious build project for anyone to undertake. All just my .02 of course.

  3. #33
    Ricky Bobby's Avatar
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    You guys need to be looking into additional cooling lines and the rad 4 manifold isolator. Also air feeds through the hull.

  4. #34
    B-Lo's Avatar
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    Quote Originally Posted by Ricky Bobby View Post
    You guys need to be looking into additional cooling lines and the rad 4 manifold isolator. Also air feeds through the hull.
    All on my list. Engine gets hot. I have an intake manifold spacer on my car and it made a world of difference cause the damn engine runs so hot.

  5. #35
    1200 stx-r's Avatar
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    Where is this manifold isolator for sale?

  6. #36
    B-Lo's Avatar
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    Quote Originally Posted by 1200 stx-r View Post
    Where is this manifold isolator for sale?
    http://www.4-tecperformance.com/inde...oducts_id=1755

  7. #37
    1200 stx-r's Avatar
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    That's good for vxs/r also?

  8. #38
    B-Lo's Avatar
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    I havent used it yet but I believe it is since we all share alot of the same parts on the 1.8

  9. #39
    Ricky Bobby's Avatar
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    Works well...it's a must have.

  10. #40
    Formerly Ultra250 TN Aquaholic6801's Avatar
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    The manifold isolators reduce intake temps by about 20*.......which equals about a 2 hp gain.....or not lost...how ever you want to look at it....

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