I recently got a 2005 BMW M3. I’ve been trying to upgrade it as much as possible. I can get it to R871, but when I look at tunes, people are able to get to R899. What am I missing?
maybe you need AWD?
I already have AWD, and my engine is a V10.
Have you tried starting with a different type of force induction? Do you have the Aero on it? Have you looked to see if increasing the wheel size increases PI? Sometimes that is the case.
If all else fails, buy another one, download one of the tunes with a higher PI and look to see what parts it put on to see what it did different than you.
I did exactly as you said. It wouldn’t let me get the single turbo upgrade. Otherwise the parts are all the same