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  1. #1
    lextoy's Avatar
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    how does air get in/out of our hulls??

    i know theres a hundred ways to setup intakes on our skis, but they almost all suck hot air from inside the hull.
    ona stock ski gtx/rxt
    where does cold air enter?
    where does hot air exit?
    whats the best way to improve airflow thru the engine compartment?
    where is best air intake location to maximize draw of cool air?
    if you put a rear intake on a gtx rxt, will it decrease airflow to the front of the ski, where the stock intake is, and allow the engine to get even hotter? i guess i'm asking if the airflow created by the air intake draws enough air around the engine to create a cooling effect, but is thus drawing hotter air? whats the tradeoff here??

    i think the rxp has a few better setups available, for outside air intakes.
    but i'll ask the same questions for the sake of better understanding our skis.


  2. #2
    Alex, cool air enters hull thru that passage in front of the seat.
    hot air escapes from the 2 small square holes under the seats...PR...

    if you sit, no matter which set-up you have hull will get hot inside. once you start moving, air is pushed in from the front seat opening, so yes air actually does move around quite a bit...

  3. #3
    The ski's have taken a "backseat" to the Corvette DarthAWM's Avatar
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    Quote Originally Posted by lextoy View Post
    i know theres a hundred ways to setup intakes on our skis, but they almost all suck hot air from inside the hull.
    ona stock ski gtx/rxt
    where does cold air enter?
    the side intake gills and through various gaps in the seats, hoods, etc.

    Quote Originally Posted by lextoy View Post
    where does hot air exit?
    Various gaps in the seats, hoods, etc

    Quote Originally Posted by lextoy View Post
    whats the best way to improve airflow thru the engine compartment?
    Drill holes in it(not good to keep water out)

    Quote Originally Posted by lextoy View Post
    where is best air intake location to maximize draw of cool air?
    On a surface of the hull that is exposed to direct airflow when at speed.

    Quote Originally Posted by lextoy View Post
    if you put a rear intake on a gtx rxt, will it decrease airflow to the front of the ski, where the stock intake is, and allow the engine to get even hotter? i guess i'm asking if the airflow created by the air intake draws enough air around the engine to create a cooling effect, but is thus drawing hotter air? whats the tradeoff here??
    I've never seen the rear intake so I can't really comment, but if its just an opening in the rear of the hull to let air in/out then the venturi effect would actually help draw air in from the from as the ski passes through the air. Heat is less of an issue than fuel/battery vapors, especially since the engine (and on I/C models) the intake air are cooled by lake water.

    Quote Originally Posted by lextoy View Post
    i think the rxp has a few better setups available, for outside air intakes.
    but i'll ask the same questions for the sake of better understanding our skis.
    Generally the trade offs considered for intake air are there to prevent water ingestion. Sure you would get a little better air flow from a scoop sticking out the side of the ski into cold air, but you also risk water flowing into that same opening.

  4. #4
    bron1c's Avatar
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    i would think you would get colder and better air flow with a front intake
    no?


    Bronic

  5. #5
    lextoy's Avatar
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    PR, that front opening actually faces the rear of the ski, when riding how does the force of the air get funneled in there? from underthe hood somewhere?? or from under the seat?
    andthat big black tube in the rear is just to vent air out??
    i always thought, it was an intake vent, that pulled cool air into the rear of the ski, then the air would be pulled alongside the engine up to the stock intake...
    i guess i was wrong.

  6. #6
    Quote Originally Posted by lextoy View Post
    ...if you put a rear intake on a gtx rxt, will it decrease airflow to the front of the ski, where the stock intake is, and allow the engine to get even hotter? i guess i'm asking if the airflow created by the air intake draws enough air around the engine to create a cooling effect, but is thus drawing hotter air? whats the tradeoff here??..
    The rear intake you're talking about...is it a breather straight off the sc...still inside the engine compartment?

  7. #7
    100% right 50% of the time? bossdukes's Avatar
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    I still need to remove the RXP decal, i just finished it today


    Click image for larger version. 

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    intake
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    out

  8. #8
    lextoy's Avatar
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    how the air flows thru the seats and thru the hull has always interested me, iwould love to see a schematic showing arrows and temp gradients around the engine inside the hull...
    cmon danny how bout that!!!!!???

  9. #9
    Quote Originally Posted by lextoy View Post
    PR, that front opening actually faces the rear of the ski, when riding how does the force of the air get funneled in there? from underthe hood somewhere?? or from under the seat?
    andthat big black tube in the rear is just to vent air out??
    i always thought, it was an intake vent, that pulled cool air into the rear of the ski, then the air would be pulled alongside the engine up to the stock intake...
    i guess i was wrong.
    Yes believe it or not the air flows under and around the seat...
    remove the rear snorkel tube... remove the front snorkel tube, just leave the short section right behind the front opening...
    unless your ski gets rolled often...PR...

  10. #10
    FIRED!!! JP's Avatar
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    nononono...

    FRONT intake is INSIDE the hull=longer intake, & HOT air!

    REAR intake brings fresh air in from behind you (as long as you didn't drink that keystone light crap the night before...

    JP

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