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      08-03-2016, 02:36 PM   #102
Benzima
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Drives: 2017 BMW M2
Join Date: Nov 2015
Location: Montreal, CANADA

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Quote:
Originally Posted by metrickid
Quote:
Originally Posted by Benzima View Post
Another question: BMW does not claim Hp/Tq gains on the MPE. Is it because the gains are only when in TRACK mode (which is not legal)? I am really curious because I do not see the difference between the MPE and other aftermarket exhaust.

Can someone dyno the M2 in Sport vs Track mode? Thanks!
From the SEMA release of the M Performance parts.

Quote:
Q: Any power gains from the M Performance Exhaust?
A: Few gains should be expected just from changing axle back exhaust on a turbocharged BMW because 1) the main restrictions are in the two catalytic converters, which are retained with an axle-back exhaust and 2) no gains should be expected without remapping the ECU because the ECU is always correcting, so for example if the car loses backpressure, the ECU will reduce power.
Thanks for info. That makes my point.

So how aftermarket manufacturers can claim gains without changing the catalytic converters?!?
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