Quote:
Originally Posted by diedvdijk
True, thats what i also noticed when i was searching for the upgrade. So the tune I had is the Z4 e85 3.0SI file with the 3.0I powerclass byte. But how is the Z4 driving so bad? Maybe do the same trick with the 3.0SI US file? Maybe the do some other changes as well? The US Z4 is also build in US. Maybe with some other hardware parts. What do you think @hassmaschine
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If your car drives well with the stock tune, and the three stage tune you’re using has no changes other than the power class, my guess would be something is up with your DISA valves.
Other than the power class, there is literally no change to the tune compared to a stock 3.0si.