Quote:
Originally Posted by Kevin M
Tuners will tell you that boost is #1, closely followed by EGT. Third is a tie between oil temp and fuel pressure IMO, but after the first two it's kind of a toss up if you're not spending time at the track. I personally still have a set of Defis I've been hanging on to forever- EGT, Oil Pressure, Oil Temp. Someday I may or may not add a boost gauge when I add, like, boost or something. But A/F is not even very useful for tuning, and totally useless when you aren't except for bling factor.
anyway, back to the subject more or less- widebands can compensate for being behind cats, but they lose precision and accuracy to some degree. Doesn't anybody make an uppipe yet with a spare bung for temporary AFR use?
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Huh? WB is essential to tuning. Don't get tuned by anybody who says otherwise. Nothing else tells you what is happening as well in open loop. EGT is a lagging indicator and can lead you down the wrong path to a blown motor.
And in a turbo car, you don't want it in the up-pipe, as the temps are too high. Downpipe is the correct location for a WB.
Oh, and what Scott said.