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  1. #1
    98gsxl951's Avatar
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    differences between et 137 vs et 68-140???

    stock ski, 4" kaniflex and FF exhaust ( will put on over winter) are the only "performance" mods i got on my 09 rxpx, as well as 15/21 solas, opas extensions, riva 2.5* wedge kit, rev buckert mod.

    not looking to modify the ski much more than this at the moment either.

    what are the differences between the et 137 vs et 68-140???and what charger would be better suited for me?


  2. #2
    ecpChris's Avatar
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    If you are not looking to modify your ski much more than it already is, the ET 137 is the way to go. You will however need to add a rrfpr to get enough fueling.
    Differences between 137 and 140 are size, boost, and volume of air pushed. You will need a little more in the way of supporting mods (and free time for tuning) to make the 140 work properly. It's a badass charger but judging by your post I would definitely recommend the 137 especially if you plan on sticking with a stock ecu. I think you will be very happy with the results. Feel free to pm me if you have any other questions. i don't always check all of the threads

  3. #3
    83.0 @ 8400 jhill19's Avatar
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    the et137 will drop directly into your xcharger housing, you might need bigger injectors like 48's possibly, plus the rising rate fuel regulator and a way to monitor air/fuel ratio

  4. #4
    98gsxl951's Avatar
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    my charger touched down after 10 hours of rebuild so its gone... just gonna buy a buiilt 137 Sc and drop it in.

    thanks for the quick replies

  5. #5
    JT jpt7779's Avatar
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    Here are the facts straight from ET!

    Engine-Tech


  6. #6
    www.eastcoastpwc.net Scott's Avatar
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    Quote Originally Posted by jpt7779 View Post
    Here are the facts straight from ET!

    Engine-Tech

    It also STATES that JT needs a 140 charger on that website

  7. #7
    MSRXP's Avatar
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    Quote Originally Posted by jhill19 View Post
    the et137 will drop directly into your xcharger housing, you might need bigger injectors like 48's possibly, plus the rising rate fuel regulator and a way to monitor air/fuel ratio
    Stay with the 42's on the 137 wheel. Fuel curve is better. Mid is mid to upper 13's and idle is 12.5. The 48's as I have found, you are at 11.1-11.4 at idle and 12.0-12.2 at mid range which equals poor fuel economy.

  8. #8
    98gsxl951's Avatar
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    my other question is how will different fuel grades effect the afrs? i usually run 93 octane, but there has been one time where the closest marina ONLY had 89 and times ones in a while 91 . but 90% of the time 93

  9. #9
    83.0 @ 8400 jhill19's Avatar
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    I only run 93. I take extra fuel if I have to, to avoid running lower octane.

  10. #10
    Eastside Powersports Slow 91's Avatar
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    Mario, the 68-140 is a bad ass charger, which your going to need more supporting mods than the 137. The 137 is the same size as the X charger but taller which will give you more volume and a couple lbs more boost. My big old fat three seater will run 75 all day in the heat, have no idea what my afr is and im running 48s @ 60psi key on pressure. im sure the ski will go 77+ once the cool weather gets here and i can get the afr 12.2. Its a great all around rec charger.

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