In Reply to: performance mods for a 98 m3 posted by gordon on April 22, 1999 at 00:54:32:
Consider the following (order is my preference and I not duplicating what you have done)
a) New camshafts
b) New titanium valve train
c) Lighter flywheel
d) Oil pan + injectors + O2 sensor + Grp N engine mounts + fuel pump
e) 3.5L high compression pistons (if you have a 3.2L engine) + rods
ECU needs reprogramming (custom is necessary - don't get generic one). Try to work with one shop that will not make you repay for the constant programming.
Have you removed the calalyzer ?