Quote:
Originally Posted by jakez
Well when I was running stock 7psi the afr's I was seeing on my wideband were 11.8-12.0 at redline, as if the engine came with a perfect tune.
After turning the boost up to 10psi-12psi the afr's are now pig rich, 11.8 @6000rpm probably 11.5-11.6 at redline.
So I'm guessing my car is sensing knock and retarding timing and increasing fuel? Isn't knock or changing timing a bad thing?
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The stock fuel map is very rich in the high rpm/load values from the factory so it's likely that's what you are seeing with rich afr at higher loads.
Also it's doubtful you are running into the knock maps because the flags (where the ecu listens) for knock are mostly in the low rpm/high load section of the maps.