Terry runs them up to about 20-22 ... then they shoot lazer beams out their frikin heads... He say 18 and then they stop making power... Bmw techs are convinced that 14 is the magic number.
I have had my pump get stuck on while I was in park.... It was the scariest thing I have ever witnessed with my car... I didn't know what to do, I jumped out, popped the hood and pulled the power on my Devils Own pressure switch. It had pushed up against my strut bar and grounded itself ( Highly unlikely this would ever happen to anyone else). I thought it looked great hanging from it but now I have a much better place for it. Log timing and monitor often to make sure your not pushing too much boost and you will be just fine. Meth is good for your car....It runs better, cleaner, cooler..
2007 E90 non sport, JB3 2.0 18ohm, Labonte Progressive Meth, Cooling Mist Solenoid & Nozzles CM5 & M7, Ar DPs, Hyperboost Diverter Valves, M3 19s, M3 Rear Carbon Spoiler, Koni FSD, ZSP Springs