JoeMama's GTO

iTrader: (3)

Just switched my car to flexfuel and took it to the dyno last night. It picked up about 20HP just from running E60. However, it gained about 30HP when I added a degree of timing. Now here is my dihlema, keep increasing the timing until power drops off or leave it alone? I pulled a plug and really couldn't get a good read on it as far as timing on the strap was concerned but I may try again for a better reading. The AFR was .70 lambda and timing was 18 degrees from 5500-redline on the pull that gained power. The car is an M6 with a P1 procharger (10 psi) and 70 shot of nitrous. What do you guys think?