Originally Posted by David328M-Sport
Yes, something from BMS. Based on the Powerbox improvement for the 325 and the E90 335i tunes on offer from them, I would expect a nice N20 boost as well from their Stage 1 php unit, currently on offer.
I initially chuckled when I read N20, thinking you wrote N2O instead.
That would have been interested to see... but excuse me while I go
Given their earlier work on the N54 platform I wouldn't use their tunes in the early stages of development personally. From what I've seen BMS have a tendency to be quick to market and cheap which may make good business practice but it's not something I wouldn't attach to my engine right now.
It wasn't until after a few years their JB4 was at a standard I would have used. Who knows, maybe they've learned something from tuning turbocharged engines now?
At the end of the day it's your car, I'd just advise you hold off on their gear for a while and let other people guinea pig.