Mike@N54Tuning.com BimmerPost Supporting Vendor Rep 3950 Posts 103,156





Join Date: Dec 2008 Location: N54tuning.com

89) iTrader: (

Drives: 2007 335i, 2015 M3

First car to have these install (BMS Test Car for B58 Development)



2016 340i B58 back from PURE with the Stage1 turbo installed. JB4 tuning for it is still a work in progress but turbo response is almost as good as stock and so far no problems making around 30whp more than the stock turbo up top.



The test vehicle is running the JB4, BMS B58 intake, BMS WMI, and PURE S1 turbo. Exhaust and emissions equipment all 100% unmodified. Boost juice and ~95 octane.



The above dyno so far (@ 23psi) The stock tuning seems to run the turbo just fine at stock like boost levels. BMS did a few runs up to 25psi (the current boost cap setting in the B58 JB4) and while it wanted to make more power there are a few tuning glitches they will have to tweak first. Hope to see 500whp with this thing shortly.