Thread: Cobb Logs
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      12-27-2012, 07:33 PM   #7
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Drives: 2011 135i 6mt, 2008 Vette 6mt
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From what I've seen most ECU tunes control mass air flow rate, on cold days the boost is lower because the air is more dense. I've seen this in my data logs, boost pressure is lower now that it s cold, but mass air flow is the same.
Good old Ideal Gas Law, PV=mRT.
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