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  1. #1
    Roll Tide!! SeadooTech's Avatar
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    Who's running Et137 +4mm?

    Ive read different threads on the et137+4mm and want to know what kind of boost u guys are seeing at what rpm, what other scer u have ran and do u like the +4mm. I have a brand new 137+4mm and before I use it I would like some feedback. It will be in a conversion and I want to make sure it will be enough because I wanted the 68-140 but didn't think the extra 300$ was worth 1lb of boost and I know the 140 has more volume but now I'm second guessing myself like I do on everything. I'll be turning the motor to 8700-8750. Thanks for ur advice


  2. #2
    C Doo's Avatar
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    15 psi at 8650, but with quite a few other bolt ons

  3. #3
    Roll Tide!! SeadooTech's Avatar
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    Will it keep making boost after 8650, another guy posted 15psi at 9k.... I wouldn't think it would stop but could be at its limit

  4. #4
    Boost addict hotbird's Avatar
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    12.2 @ 8300 so far. At the map sensor.
    Last edited by hotbird; 07-20-2013 at 08:40 AM.

  5. #5
    stuckmoto's Avatar
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    Down to 13.5 @ 8800. Need to shim...

  6. #6
    Aussiepauly's Avatar
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    Quote Originally Posted by C Doo View Post
    15 psi at 8650, but with quite a few other bolt ons
    Same as CDoo

  7. #7
    Roll Tide!! SeadooTech's Avatar
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    Will this scer stop making boost in the high 8s?

  8. #8
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    Anyone ?

  9. #9
    Mothman's Avatar
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    A non-restrictive, efficient ic core will help with boost numbers. You will gain a little, especially at high rpm, with a good (expensive ) core.
    Good luck!

  10. #10
    Boost addict hotbird's Avatar
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    15 psi at 9000 rpms now.

    77 gps mph on a rxt

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