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