Thanks.
Started to do some tuning, but sticking to 2nd gear pulls at 11psi. Here is what I've noticed:
1. 11psi ~ 40% duty on 1100cc injectors, .65 BSFC, ball park 387bhp (or 320whp). Big grain of salt there, but this is at 7200rpm. Gives you an idea of what I'm dealing with now...
2. The car feels like a boat / Cadillac / unsafe. I ordered Poly front lower arm bushings, and have to inspect all the bushings on the car. Car feels very loose
3. Perhaps it is the non-LSD rear, but it wants to pull to one side frequently in 2nd gear. I haven't done pulls in 3rd for fear of safety. I kept the Auto diff ~ 3.64 ratio. I believe there are LSD options for this specific diff? May have to investigate soon
Coming from the land of the Toyota Supra, at 110k miles, all the suspension was still in tip top shape. I couldn't believe how worn out the Z4 is, underneath, at only 90k miles
Shame...
I'll also be pushing this GS6-37BZ 6-spd, auto diff, driveshaft and Z4M half-shafts to their limits. Being that they seem to handle 300ft.lb. to the wheels quite well on Supercharged variants, I should at least get to that power range reliably (one would hope!)