highboycoupe - has a throaty and bassy idle with some quiet popping, but ive read that all iS's sound like this!
J
ive read about the m42 having a dual mass fly, and with a single mass from another e36 and a few other things altered it can give more responsive throttle and acceleration? did you do perform the swap on your iS, how difficult it to do?
One thing that is worth doing is changing the flywheel, the stock one is massive to try and control the engine a bit, the engine was designed with touring car racing in mind and so had to be strangled for the road.
J
ive read about the m42 having a dual mass fly, and with a single mass from another e36 and a few other things altered it can give more responsive throttle and acceleration? did you do perform the swap on your iS, how difficult it to do?