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  1. #1

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    what is correct afr to have?

    does anyone have the numbers, im at low rpm 12.5 mid rpm 11 wot 10.3


  2. #2
    RUSH.'s Avatar
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    Quote Originally Posted by stevorxp007 View Post
    does anyone have the numbers, im at low rpm 12.5 mid rpm 11 wot 10.3

    12.5 is about perfect for hp but a little lean @ wot for safety of your engine. If you tune your engine for 12.5 + you want to constantly monitor it for any variations. 11.5 is very safe and still good for performance. 10.3 @wot is rich you definately can lean it up and pick up some speed/

  3. #3

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    u mean less gas right?

  4. #4
    Mod less, ride more! troyheb's Avatar
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    Lean = need more fuel, rich = too much fuel.

  5. #5

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    so i need to turn down the gas to get the number from 10.3 to 11.5

  6. #6
    RXP 260 X Short Course Veteran RXP244's Avatar
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    AFR

    I was tuning my afr to 12.4 at WOT and at lower boost, thats OK. I was running WOT for extended periods for enduros. But now with more boost/hp you don't want to run higher than 12.1 at WOT. Of course AFR is the most basic way to tune if you are not monitoring other things like EGT's etc. Anything between 11.5 to 12.1 would be considered safe for extended periods of WOT.

    Higher base pressure=lower AFR=Richer

    Lower base pressure=higher AFR=Leaner

  7. #7
    richrxp's Avatar
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    idle - 2500 rpm max 13.5 afr
    2500- 5000 rpm 12.5 - 13.0 afr
    wot 11.6 - 12.0 afr

    Are u using a rrfpr or a fuelcontroller.
    With the rrfpr you can only set wot.

  8. #8
    Quote Originally Posted by stevorxp007 View Post
    u mean less gas right?
    if you are really asking that question it seems you should leave the tuning for someone with more experience.

  9. #9
    GOT BOOST? Dockside's Avatar
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    Quote Originally Posted by GrizzlyMan View Post
    if you are really asking that question it seems you should leave the tuning for someone with more experience.
    welcome, great 1st post buddy

  10. #10
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    Quote Originally Posted by Dockside View Post
    welcome, great 1st post buddy
    my thoughts exactly!

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