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  1. #1

    Sanding the hull for speed? (and tunnel??)

    So, in another guy's thread recently, this topic was discussed somewhat.

    Well, instead of hijacking his thread further...and instead of sanding only the hull (straight strokes - front to back with coarse grit), im interested in finding out if anyone has sanded the pump tunnel (correct name?) the same way and for the same reasons?

    My plate, grate and driveshaft are all out at the moment and its a perfect time to sand the "tunnel" area everywhere after the intake grate. I ask because its seems kind of strange to sand the hull, but leave everything else "after" it all smooth. So, can anyone make sence of this? Do it? Don't do it? Speed gains?

    Thanks,
    sean


  2. #2
    i was told not worth your time for the gain (you have to know what your doing too) and smooth (as Smooooth) isn't faster.

  3. #3
    Quote Originally Posted by middaughm View Post
    and smooth (as Smooooth) isn't faster.
    thats why im asking about sanding anything more than just the hull

  4. #4
    rxpdoo's Avatar
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    Quote Originally Posted by blkturbo! View Post
    thats why im asking about sanding anything more than just the hull
    i would leave it alone. i did that on a 2004 hull and in the back the factory puts in hooks and if you disturb them your boat will hunt terribly. ask me how i know.

  5. #5
    and even if it does work you will gain 0.25 miles? maybe, so i think that it does not worth the time..

  6. #6
    Quote Originally Posted by rxpdoo View Post
    ...in the back the factory puts in hooks and...
    You lost me here Where in the back do you mean exactly? Literally the back of the ski where the TOW hooks are? Im asking because i was just curious about the tunnel area ---> from grate to the prop

  7. #7
    home of the dislexic fingers breon's Avatar
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    if you put a ruler on the bottom of the hull the very tail will turn down a little maye 1 mm or so that is the hook ..it add stability to the boat at speed i did a bunch of reasearch on line ..everthing i found it is best to make it smoothe as possible..not rough

  8. #8
    Quote Originally Posted by breon View Post
    ...everthing i found it is best to make it smoothe as possible..not rough
    You mean to the "hook", or to anywhere on the entire hull in general?

  9. #9
    home of the dislexic fingers breon's Avatar
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    the entire hull as smooth as possible miror finish...is what i concluded afer 4 5 hours on th internet searching reading ect..

  10. #10
    bex's Avatar
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    I wouldnt mess with the pump tunnel at all. Sanding leads to micro disturbed flow, provides lifting on hull and hence less drag. I think that will be bad for the pump, you want solid water in there going in and out. Just my $0.02 cents.

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