Quote:
Originally Posted by cossie1600
why do you guys bother on a stock ecu? car is tuned for a maximum of 91.
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I usually don't run the high octane, but I did once just for the heck of it. Didn't make any more power according to the butt dyno but less timing was pulled towards the end of the session. The ECU does automatically advance timing to a certain degree, within the limits set by the program.