Author Topic: AC Schnitzer Chip (Read 3586 times)

dvmotorsports · « **on:** April 24, 2010, 05:35:29 PM »

So I came across an authentic ACS M42 chip with papers for a smoking deal. I threw it in a couple of cars we have and all I can say is holy schei�e . My motor spins quick as it is with the Euro 323 LTW FW. But from 3400 to 7x00 RPM this thing just flys. What a ridiculous powerband and power gain. Never expected that from this chip.

BlueBMW · « **Reply #1 on:** April 24, 2010, 07:04:23 PM »

Any idea how it might compare to the oft praised Mark D chip?

dvmotorsports · « **Reply #2 on:** April 24, 2010, 08:00:51 PM »

Never used the Mark D.

bmwconnect · « **Reply #3 on:** April 24, 2010, 08:19:29 PM »

they both take away a small percent of fuel in WOT fuel maps and they both add about 8-9degs of timing

they are almost identical tunes

low load ignition is advanced adjusted and are very similar also