I've now decided against mapping my 28i.
Reason being is I don't trust any of the tuners.
I've seen so many tuners take a car that was mapped elsewhere and show how dangerously they've been mapped i just don't want to risk it.
I trust a number of VAG tuners and a couple who tune Mini's but I don't know enough about BMW tuners and I don't think anyone knows enough about the N20 engines. The majority of development and knowledge seems to be on the 3.0 turbo engine.
These piggy back boxes can't be vehicle specific. I just can't believe a small company can produce an individual tuning box for so many different cars! It's obviously just a trick to the ECU asking for 10% more of everything.
I hope everyone tuning the N20 has no issues, if I had an 18i or 20i I'd probably go for it, but the 28i seems quick enough and I'll wait for an M4 to get my boost in power!
