Thread: M3 on the Dyno
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      09-18-2011, 11:27 PM   #5
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Drives: M3
Join Date: Sep 2011
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What do they do differently for a pulley and exhaust etc? Compared to a standard "cookie cutter" tune. Just curious which aspects of the tune need to be adjusted? A/F ratio, timing etc? Not sure how you really take into account a pulley on a tune for example