Unboxed the latest mod. After much debate over catted vs. catless x-pipe, giving the catless route a shot. M3 isn't my daily but still question how much I can tolerate the smell and noise. Next up is deciding which tune I want go with between BPM, Evolve, Alpine, etc.
I’ve had AA and BPM stage 2 tunes. The AA was uploaded to my ‘09 e92 M3 and the BPM tune is installed on my ‘12 e92 M3. BPM tune raised the redline to 8600 rpm.
I was able to compare both tunes by having a friend drive one car while I drove the other car. We both drove each car to minimize any differences in driving/launching the car. We each did 10 pulls from 5 mph. The results showed the BPM tuned car consistently pulled a 1/2 car lead on the AA tuned car through the 1/4 mile and it was still inching ahead after the 1/4 mile. The ‘09 also has had the BPM stage 2 uploaded
You should also look into the Epic Motorsports e9x M tune. Randy tunes most of the top M cars (i.e., max power/torque) in BMW Club Racing, NASA and time attack cars. His tune wasn’t available when I purchased my tunes otherwise I would be using his tune. However, I do have his DCT software which works on cars that have replaced the stock diff to diffs different FD ratios, addresses the slow downshift/throttle blip with different FDs, and up shifts at redline in auto (D) mode.