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  1. #26
    Dr Honda's Avatar
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    Quote Originally Posted by chucked View Post
    I wouldn't be against installing stronger valve springs to overcome the higher rpms. Another thing, can the hull handle the extra speed?
    Unlike a car engine... when you put on heavier springs to get that valve closed faster... you then run into the problem of crushing a valve seat, cupping the valve head, or stretching/breaking the stem. (this is the kind of stuff I deal with in my shop on motorcycle engines)

    I guess the real prob is... the 3 cyl ACE engine is new, and we don't have any REAL life data.

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    Tony
    Prez, A&L Motorsports, LLC
    PM or post for help. Don't leave questions in my profile box. (i never check it)

    I'm not going to be able to do vinyl or carbs for a while. Starting my new job is taking a lot of time

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  3. #27
    Dr Honda's Avatar
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    Quote Originally Posted by chucked View Post
    What about 60hp to 109hp? Thats pretty cheap horsepower. Ive seen a lot of four stroke guys spend $1000 for 10 hp.
    It's not the same. The 60hp ACE engine IS the 90 hp engine, and it's just a lower RPM via the computer. In this case, you are simply unlocking the engine to it's designed power.

    When the guys look for power on the 4-tec engine... they are physically changing things, since that engine is running at it's max potential.

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  4. #28
    SeadooForum Hall of fame SabrToothSqrl's Avatar
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    Max RPM can't be the only thing they change.. is it? I'd feel jaded if the tach went to 8k and the ski did like 6k... I'd have to start paddling along side it...

    the fact that it's the same prop would lead me to believe these models have more in common than they claim.

    60 vs 90 HP at the push of some electronics... why even make a 60 HP version?! the OEM cost can't be that much different...

    Maybe I should take my spare 951 and build a go-kart while we wait...

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    Buying ONE more blown 951 ski so I can get rid of my last engine... looking for a 2000-2002 GTX or XP.
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  5. #29
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    As I have posted before I have been told that the Display is related to the ECU so you cannot simply reflash. Its a reliable source, but it could be incorrect.

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    Current part out list; Click below to view pictures. PM for availability & pricing





    Ride it like you ain't got a dime in it!!!

  6. #30
    Dr Honda's Avatar
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    Quote Originally Posted by SabrToothSqrl View Post
    Max RPM can't be the only thing they change.. is it? I'd feel jaded if the tach went to 8k and the ski did like 6k... I'd have to start paddling along side it...

    ..................

    60 vs 90 HP at the push of some electronics... why even make a 60 HP version?! the OEM cost can't be that much different...

    ...................

    I said the same thing before they came out.


    It has nothing to do with production costs... it has to do with PROFIT. Basically... the margin on the 60hp unit is going to be VERY low. BUT, they can lure people into the dealerships with the LOW price tag. Then, once you are there, and the salesman does his job... you walk out with the 90hp, with the basic upgrade pack, and some other options. AND... this is where they make their $$$


    Think about it... the $600 for the 90hp version is PURE PROFIT to seadoo, since it's just a software change. So, they are going to push you to buy the more powerful ski.



    You have to remember... this is a fly-by-wire throttle. So, the computer can make it any HP they want it to be. With that said... I'm sure the engine can spin higher, and make more power, but Rotax deemed that the 90hp mark was the best for reliability and long life.

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  7. #31
    SeadooForum Hall of fame SabrToothSqrl's Avatar
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    i think it needs more power ahrrr rrr hhrrr

    http://www.youtube.com/watch?v=eZ9Xk0Lln5Y

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  8. #32
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    A VTECH mod for a Turbo spark.

    A 15 second trial run is here........ http://www.youtube.com/watch?v=LhLUncP6wJw

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