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      08-31-2012, 07:24 PM   #17
Racer20
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Drives: F80 M3, 228i THP, E46 ZHP
Join Date: May 2009
Location: Ann Arbor, MI

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You picked up 3.5mph over the course of the night. Temps will have a huge effect on a supercharged car . . . Not sure how the ESS tune works, but on my previous car (2008 corvette) the ECU would start pulling timing once the IAT reached 88 degrees. There was a noticeable drop in power in hot weather, my estimate would be 25-30hp. Run it when it's closer to 60 degrees and you'll see a couple more mph.
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