[Mike@N54Tuning.com]

For those not familiar it's an N20 motor rated at around 185hp from the factory.

It's been rumored that it's basically identical to a 328i only detuned from the factory and so far BMS has not found anything to disprove that. From the factory it runs a modest 8psi and feels like an absolute slug. Stock dyno numbers at 183whp confirmed its neutered status. The factory 328i does ~235rw for comparison.

Initially the Stage1 tune was installed using the default +3psi settings and it perked up to 212whp. At the higher +4psi settings we got 220whp. Pretty close to 328i numbers. Not bad for a simple to install inexpensive upgrade.

After the Stage1 testing BMS threw on the BETA Stage2 for a little fun. There is still plenty of work to do but was rewarded with a best of 266whp showcasing this platforms potential. Up next BMS needs to richen up the air/fuel targets on Stage2, take direct control of the electronic wastegate, and finally do some E85 tuning.