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Drottam Drottam is offline
New Member
Posts: 21
Join Date: Jul 2017
Car: F10 550i N63tu xdrive
Default 12-14-2017, 07:58 AM

Originally Posted by J. Dub
I've got a 650i x-drive coupe w/ n63tu. I am subbing to your thread OP. Great work so far.

I wish BMS didn't shun the jb4 for our engines.

I bet in 2 years we'll have inlets, high flow *** **'s, & a good intake (unlike the current intake that I think is prone to hydrolock on a hard rain).

Question, why were you running 26peak psi on the stock turbos? I thought the ceiling for them was 25psi?
Regardless, I love your progress. You give me hope.
You can still get the JB4 for the M5 and run it with the N63tu software. I think BMS will pick back up if the community shows interest and starts to support! N63tu now has flash tuning as well so that paired with the JB4 will open up these cars even more! JB4 is a must to get the highest boost like I was running. But I have a speed limiter that needs to go so I need a flash. Plus flash will be able to cut out the CEL from map sensors being unplugged with JB4. So, perfect combo for me. Plus my base tune from flash will run strong.

I think all of those mods are available for this car already. Just depends on where you look.

I have been tuning the car myself after Terry set up the initial tune when I installed the BCM (I have prototype 550i JB4, the M5 comes with BCM). So as I have been playing with my tune and adding more e85 my car would run strongest with 26psi 50/50 mix of e85/93oct. My turbos have actually held 30psi for 2-3rd gear pulls! So I think our turbos are strong enough to hold the boost, but at that level they are just spinning too fast and making a bunch of hot air. I donít run 26psi daily unless Iím feeling peppy

I typically run 22psi using 93octane and she runs strong! But IAT are a bit high during the hot days. So we really need better ICs and meth! Iím not sure that we need turbos unless you want a 10 second daily!! (ME!!)

F10 N63tu 550i Xdrive Msport, Imperial Blue Metallic, Beta JB4 w/BCM, Frequency intelligence catback, 20" Matte Bronze Ferrada F-8 wheels, H&R springs - WR 11.057@123.19 quarter mile
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