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  1. #1

    Fuel cut defender

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ID:	360125Does anyone know which wire to splice into on the map sensor for a Turbosmart fuel cut defender on a R12x? There's a red, light green, and dark green with light green stripe.


  2. #2
    jlfx car audio's Avatar
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    It works great but it uses 12v instead of 5v. So you have power, ground, signal in and signal out. The striped wire I think(from memory) is the one you CUT and splice the fcd beyween

  3. #3
    Quote Originally Posted by jlfx car audio View Post
    It works great but it uses 12v instead of 5v. So you have power, ground, signal in and signal out. The striped wire I think(from memory) is the one you CUT and splice the fcd beyween
    not to jack but did u ever use the resistor trick to hold it at 4v at wot vs the turbo smart fcd2

  4. #4
    jlfx car audio's Avatar
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    No I never did try it but it will not work unless you have a mbc installed

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    jlfx car audio's Avatar
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    The fcd2 and the resistor mod both potentially do just that limit the high voltage signal that triggers limp mode..
    So a manual boost controller is required to keep boost in check. On my first r12x I modded I used the fcd2 setup and above 14.5ish psi stock fuel system couldn't keep up...
    So I added meth injection to help when I ran above 15psi...
    On my current ski I (as of now) havnt done any boost mods... Only big ic & strait pipe and that alone put me @6350 on stock prop... So I'm content considering if I went with more than 1+ psi I would be on limiter.... And the correct prop would take about $400 to have impros tweak it to spec for it to be worth wile... And to me it's not worth $500 for 3mph / 3ski faster in a 1/8 mile...

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  7. #6
    Jake Speed's Avatar
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    Hey jlfx car audio I did the same as you with the mods and thank you for your help in the passed with that and i logged 70 + hours on it with those mods and a set of Nitro springs and retainers. The ski will hit a top speed of 66 mph at 17 psi of boost the ski has grand total 290 hours on it. Thanks again!

  8. #7
    jlfx car audio's Avatar
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    Glad to hear it bud, I'm actually on the way to the lake for my first outing this yr to shake it down.
    BTW, What prop did you run?

  9. #8
    Jake Speed's Avatar
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    Right now a 18/30 but it's slowing the ski down the rpm is at 5600 I will go back to a 17/29 this week ! I would like to try a SKAT-TRAK 17/28 to see what would happen with the mph.

  10. #9
    jlfx car audio's Avatar
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    I was at a 13.5/31 stock prop... It was awesome from a dig and on top...
    The 18 leading edge is killing your holes hot. I tried going steeper first also with all the "hype" of taller leading edge and I found it slowed ski down from a dig.

  11. #10
    jlfx car audio's Avatar
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    My ski ran it's best last night that it has ever ran (this is my new ski I got last summer) it ran @ 6400 rpm @ stock boost with stock prop. But it has larger ic and strait exhaust I built myself... GPSed 65.2mph I was impressed water Temps were 61deg and air temp was 80. Water was almost glass

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