|
In the last edition of German magazine Autobild Sportscars they ran a story covering 7 tuners plans for the M4:
All quoted around 500hp
Manhart quoted 500hp and 640Nm
Two companies claimed 510hp and 516hp respectively.
AC Schnitzer also said 500hp.
As swamp2 pointed out, these will all be piggyback tunes. Both because it's "impossible" to crack the ECU these days and just as much because German tuners need to comply with emissions legislation. By using a piggyback they can rely on the stock BMW software for the test cycle criterias (which only consists of fairly low load driving). That way they meet emission standards without problems, and can add power outside the test cycle criterias.
|