[Belgian_Bimmer]

I've been hesitating and finally decided to remap (ECU) my Z4 M40i B58 engine.

Measurements on Dyno:
- stock: 353 HP / 577 Nm ( vs EU spec: 340 HP / 500 Nm) => engine delivers more power than BMW's official figures.
- stage 1: 410 HP / 630 Nm

First impressions:
The car has gained a lot of agility, especially in the lower REV's.
On dry roads it delivers real super-car performance. However on wet roads it can barely handle the engine's power in first and second gear.
Fuel consumption has certainly decreased but actually I can't tell to what extend.
Because the gear shifts are a little more 'brutal' I'm considering a software remap of the transmission in the near future.

Conclusion:
If you consider a sportier and more agile drive, i certainly advise a stage 1 remap.