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      05-07-2012, 10:22 AM   #19
CanAutM3
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Drives: 2015 M4 DCT
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2015 BMW M4  [4.75]
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Quote:
Originally Posted by THE-FN-MAN View Post
So if I've seen my needle at 8600 on the gauge cluster does that mean my motor is actually spinning at over 9000rpm?
Assuming that your tune does not change the tacho correction factor:

8600 indicated RPM x 1.018 = 8750 actual RPM