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  1. #1
    Matatan tocullo's Avatar
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    11.5 AFR at 8760 rpms???

    Is it safe if I lean it a little? Stock pistons, 17lb boost.


  2. #2
    Mod less, ride more! troyheb's Avatar
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    Maybe just a tad. 11.7-11.8.
    I am just not sure with stock pistons with that much boost and that high of revs.

  3. #3
    Matatan tocullo's Avatar
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  4. #4
    speedskixp's Avatar
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    I would leave it be. I run mine 11.6ish at those rpm's.

  5. #5
    RXP 260 X Short Course Veteran RXP244's Avatar
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    Quote Originally Posted by tocullo View Post
    Is it safe if I lean it a little? Stock pistons, 17lb boost.
    With stock pistons you've got limited life at that boost anyway. I would stay on the side of caution. Unless your only talking about short bursts and not doing any long WOT runs for minutes at a time.

  6. #6
    Autism Speaks. Its Time To Listen gOt BoOsT's Avatar
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    you should leave it...the little bit of speed/power gained from going leaner isnt worth a motor.

  7. #7
    dnielsen's Avatar
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    Don't touch it, you need the additional cooling.

  8. #8
    boost junkie skidoochris's Avatar
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    IMO the stock pistons should be good for 30+psi but about 25+psi the stock rods are done
    I see most run race ecu's for rec use that sounds like a good way to destroy a motor
    Also a turbo motor cannot use ecu's mapped for a SC
    11.5 sounds good for very hot weather as it gets cooler the afr will rise

  9. #9
    MSRXP's Avatar
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    Quote Originally Posted by skidoochris View Post
    IMO the stock pistons should be good for 30+psi but about 25+psi the stock rods are done
    I see most run race ecu's for rec use that sounds like a good way to destroy a motor
    Also a turbo motor cannot use ecu's mapped for a SC
    11.5 sounds good for very hot weather as it gets cooler the afr will rise
    Stock rods are good to 450hp. Been tested and tested some more. Not so much the cooler air as it is a lower density altitude.

  10. #10
    boost junkie skidoochris's Avatar
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    do you mean they bend at 30psi($450hp) or the will last a few seconds or good to use at 450
    Because they look like they will bend about 30+psi

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