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      03-17-2018, 12:36 AM   #1
Morebs4me
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Drives: 550i
Join Date: Apr 2017
Location: Florida

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2013 550i with alpina turbos qt mile runs. Serg tuned and jb4

The slowest run tonight was 12.4 where I launched too hard, and had to back out. Consistent 12.29 without the jb4, possibly even 12 flat tune only.

Jb4 adding a few psi brought me into the 11s. Tune alone I was trapping 118-119, I was able to trap just over 120 with the jb4.

I launch awful, I’m going to work on it. I should be 1.6-1.8 60 ft eventually. Only downside is maf codes over 6k rpms if I’m over 20psi, I went too high on fol on jb4 with the 112mph trap and had the code for both fuel pressure and maf but still pulled off a 12.1 with letting off 2/3 of the way through the run.

Between the tune and the turbos the car feels like a whole new car. I can’t wait to dyno and also get deeper into the 11s.

Last edited by Morebs4me; 03-17-2018 at 12:45 AM..
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