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      07-05-2012, 10:35 PM   #34
Mike Benvo
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Drives: 08 E90 M3 / 400whp Turbo 7
Join Date: Apr 2008
Location: SoCal

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1990 BMW 735i Turbo  [5.00]
2004 BMW M3  [0.00]
2008 BMW M3  [5.00]
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Quote:
Originally Posted by m3alabama View Post
wow never knew this and actually just thought about this the other day when I wondered why you cannot actually rev to 8400 indicated on the tach but did not know why! I kept trying to go over the redline to hit "8400" but it hits a soft cutoff and knew this could not be right.

How cheap is the M that they can't make a different guage for the tach than the m5/6!

I can see why now people may register an "overrev" as you can take it beyond red probably to 8500 before you hit the cutoff
Yes, there are higher limits in the code above the redline actually set. One is on the injection side of the processor and another on the ignition side of the processor - max rpm for injection / max rpm for ignition.

There is also a byte that refers to rpm buffer. All of this combined lets you hit 8,450 ish with a stock car (especially with DCT).
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