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AWSAWS AWSAWS is offline
Posts: 1,525
Join Date: Aug 2014
Car: 335i MSport DCT
Default 06-09-2016, 09:30 AM

Originally Posted by Terry @ BMS
Hey guys,

Had a chance to strap down our 2016 340i today for an hour of dyno tuning. Having done lots of runway testing last weekend at Shift Sector, including taking down a stock tune M4, I had a feeling the car was going to perform pretty well on the dyno. And was not disappointed.

The current setup is 100% stock except for a B58 JB4 BETA, BMS intake, and a BMS B58 water/meth kit. Exhaust is fully stock. Fuel was ~93 octane and meth mixture ~80%.

The BMS B58 water/meth kit has some additional parts not included in our normal kits including a PNP nozzle adapter, an EWG connector for the JB4, and some additional fittings.

With the EWG connector in place we're able to control as much boost as the turbo wants to make. But we've found power peaks out ~21psi, despite the turbo willingly making much more boost. Runs from 22-24psi at the same timing values all resulted in the same or less power. So we're probably approaching the stock turbo limits now. Maybe another 15-20whp ultimately in there with exhaust and other work.

Most impressive is how well it holds power to redline especially relative to previous turbo BMW motors like the N54 & notoriously weak top end N55. I'm pretty excited about this new motor.
I've just seen this thread. I was behind a 340i last week. I was ready to have a good play on the highway but a car had broken down and traffic didn't allow it.

It looks like the actual boost is quite a way below target most of the pull? Why do you think that is? As you seem quite confident the Turbo can do more.

What is with the timing as well? Maybe I'm reading it wrong but it looks like it was 0 for a while.

UK FBO 335i, GCs, JB4, PI meth, BMS CP, OCC, Braided brake lines. Diff Lockdown. TMAP sensor, custom bucketless stage2

11.79@119mph on stockers, CP meth (UK, Santa Pod)
11.74@129mph on GCs, custom port meth injection.
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