Quote:
Originally Posted by M3/4 life
The new M5 hasn't been out very long and with Manhart Racing ECU software & a GruppeM carbon fiber intake system it gained 16% over stock taking it from 560hp to 646hp! As popular as the M3 is I doubt it will be long before Mike over at BPM will have a tune ready for the M4!
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And how much do those mods cost? And what is the size/displacement of the M3/4 motor vs M5/6 motor (baseline for analyzing expected gains)? And do you think BMW is going to make it easier of harder to tune the M3/4 comparatively? And you think some forum tuner is going to be the one to figure this all out? lol