The following is the deltas for awhp between stock and tuned based on my eyeball of the dyno sheet.
3500 rpms - 105 awhp delta
4000 rpms - 115 awhp delta
4500 rpms - 125 awhp delta
5000 rpms - 115 awhp delta
5500 rpms - 80 awhp delta
6000 rpms - 60 awhp delta
Based on that, you can really see that these turbos get winded up top when maxed out. Hence the next level is upgraded turbos to go the next 100 - 150hp (assuming you go with vgt).
Also, I expect that tq to make quick work of my stock clutch.
Driving, it’s obviously more of a rocket now. The power in the mid range rips the car in every gear. The added power feels no difference. In my 08 335i, when I modified it for an additional 50% more power, I could feel the engine working to make that extra power. The m64 feels exactly the same with power rolling through the power train as smooth as stock.
It’s grossly fast and I think I might have met my need for speed. Anything with more power would just continue to be limited by traction and only increase accelerations in higher gears which translates into speeds I just dont use on the street.
The cars behaves exactly at stock but with more power. I only run in spots mode now to get the full 17 psi. While stock, the car was very
sensitive to inputs at lower speeds in sports mode causing me not to use it while I had passengers to keep the ride smoother. Now, the car is very civilized and easy to modulate in first gear. Could be in my head, but I feel like they have refined that input.