Originally Posted by e90pilot
Oh, so you got a E89 Z4 engine, the one that had the plastic valve cover. It also had a different ECU than the original 325/330. That's cool how you got it all working. I was kinda wanting to turn my e90 into a track day car a few years after I pay it off. With all the non-essential modules removed, does the ECU give you any issues or does it work fine with all the faults?
I thought the the 3.0si from the e85/86 looked the same...
No need to have to gut your car and put in expensive race parts to take your car on track. If you're worried about any incidents, get HPDE insurance.