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Thread: fuel air ratio

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  1. #1
    Join Date
    Apr 2008
    Location
    Crystal Lake IL/ Houghton MI
    Posts
    64
    14.7 is stoicametric ratio greater than that is lean and less than is rich so you are still running a bit rich, you could lean it out more in the load cells that you normaly cruise in and keep it rich in the high load cells

  2. #2
    Join Date
    Jul 2008
    Location
    Conway, SC
    Posts
    35
    ok well my next question is will it hurt the performance of the motor long term?

  3. #3
    Join Date
    Jul 2005
    Location
    Azle , Texas
    Posts
    702
    12.5 to 13.2 is good for WOT PE mode , 4000 rpm to max rpm on a Naturally Aspirated engine .
    Some engines like 12.5 some 13.0 , all depends , get on the Dyno and see which one makes the most power for your engine , 12.5 - 13.0 .
    Like blander66 said idle to part throttle at 13.0 is rich , but maybe your setup likes that AFR .
    Being rich does not hurt as much as being to lean , but neither is good .
    Now what is a tune again?

    Comp Cam 54-412-11 , Int:265, 212, .522 , Exh: 271, 218, .529 , LSA 114 , Longtube , CAI (Vararam) , TransGo HD2 shift kit , tuned by me with EFILive

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