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?perfect a/f?

Discussion in 'Forced Induction' started by whinybitch, Oct 29, 2009.

  1. whinybitch

    whinybitch .

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    .
     
    Last edited: Apr 16, 2012
  2. phyregod

    phyregod !!YTINASNI

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    With a turbo/supercharger/boost application, rich is safe. 10 is overkill. 12 should work beautifully. Always err on the side of rich though. Fouled plugs are cheaper to replace than engines.
     
  3. Briansol

    Briansol Admins Admin VIP

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    14.7:1 is stoich.
    low 14's- high 13's is good for all motor
    right around 12:1 is good for turbo.

    10 is pig rich, wastes fuel, and robs power.
     
  4. pooksy64

    pooksy64 RidetilldeathdousparT

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    ---yes 14.7 is stoich which is stock on all cars. and also tru all cars have a preset A/F ratio table on WOT (stands for wide open throttle<--for noobs) when WOT is hit the vehicle ecu will turn to a preset fuel and A/F table which will run slightly richer(below 14.7:1)



    ---why is lean only good all motor?
    12:1 A/F ratio is slightly richer yes which aids in knock/detonation/& preignition)

    All motor is basically the same as forced induction in a way.

    all motor--> run higher compression pistons (EX : 14:1 compession ratio pistons)so the engine will compress more air on its own thus more power.
    forced induction--> run lower compression pistons (EX : 8:1 compession ratio pistons) so it will compensate for all the air that is being forced into the engine.

    --> both motors are trying to compess as much air as possible more air+ more fuel= more HP

    you run lean yes you will create more HP no doubt.
    LEAN condition-- higher cyl temp. cause preignition/ detonation..basically more of a risk of damaging engine:eek: internals frm heat.

    you run rich yes it is safer, cyl temp is lower.

    basically A/F ratio is to keep the engine running @ the target HP you plan (EX:500HP) safely.

    remember to *rich you will washboard the cyl walls to *lean overheat.


    i think i said to much
     
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