Originally Posted by brusk
I'm no turbo expert but looking at the pics of that vs RB's and others in the recent turbo threads that looks like an upgraded stock sized turbo which already is capable or 400+HP so if that is the case I would consider selling those and buying a tune. Without a tuner to adjust make adjustments you can do all you want to these cars and it will only result in stock like performance at best.
I'm thinking the car wouldn't run properly without a tune. While our ECUs are pretty good, I'm thinking larger turbos might be a bit rough without any software changes to support... I might be off base though as I'm not an expert.
Jet black e92 6mt 335xi:
18" BBS RGRs, KW v1, ESS Stage 2 flash, VRSF 7" FMIC, VRSF downpipes, JG Mods m-tech front, mtec V3 AEs, BMS OCC, hardwired valentine 1, p3cars gauge, amber delete, sport seats, factory oil cooler.