I'm just curious if anyone can suggest some good articles, sites or forums which gives tips on tuning bmw's, or cars in general, preferrably for forced induction vehicles as well. The more information the better as I'd like to learn as much as I can.
For now I've done some light tuning below the boost range (0 ~ 3000rpm) on my car by richening the fuel a bit at idle (seemed to smooth the idle out a lot), re-calibrating my ecu to handle larger injectors, and advancing my timing by 1 or 2 degrees below 2800rpm while retarding it 1 degree when in the boost range. To be on the safer side I added some more fuel in the upper rpm ranges as well which I can feel pulling me back a little but it's probably safer. These changes seemed to give me much better accelleration off the line, and almost sling shots me in 1st from a stop which was much better than the bogging it experienced before. I also dont stall at highspeeds anymore after limiting my MAF at 4.97volts via an electronic voltage clamp. Eventually i'll buy a 3.5" one to replace it though as doing this is only a band-aid fix.
I know I'm playing with fire, but I'd like to learn none the less since I have access to a dyno for free right now