05-02-2014, 09:35 AM
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#9
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Senior Member
Join Date: Sep 2012
Drives: 13 White MT FR-S
Location: Gastonia, NC
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Quote:
OPEN LOOP
There are times when we want our car to not run the stoich AFR. This would be when we are trying to
make a lot of power by compressing the air/fuel mixture as much as possible before the spark plug
ignites it. So what AFR should we run? A 12:1 AFR is good for power, but dangerous to the engine. It
would be good for an aggressive tune on a car that you won't mind if the engine goes. The more reliable
AFRs of 10.5:1 to 11:1 for a TMIC and 11:1 to 11.5:1 for an fmic are usually used on a daily driver.
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12.1 dangerous? really?
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