View Single Post
      11-11-2012, 04:20 PM   #79
edo's Avatar

Drives: E92 335i
Join Date: Nov 2008
Location: hell

iTrader: (1)

Went for some data logging today. Found out what was the reason of high boost - I accidently turned autotuning on (2 instead of 1 in the user adjustable menu).

Switched autotining off, changed start boost and overboost limit to default settings and did some data logs.

9-10 aggressive beta map (FBO upgraded turbos MT), default settings (start boost 50%, overboost limit 17 PSI):

First run:

Second run:

Third run:

Fourth run (decided to lower start boost to 40%):

Fitth run (set start boost back to 50%):

Last run:

The first question is simple: WTF??? FBO, RB turbos, 98 octane fuel, moderate boost (my car used to autotune to ~same boost with stock turbos) and these f*cking timing drops... Could it be because of the fuel? I always fill my tank in the best brand gas station in my country (Statoil).
The second question: if autotune doesn't work and is switched off, how come boost almost all the time is higher than 16 PSI, sometimes even 17+PSI?
Mods: RB turbos, PROcede Rev2.5 V5, BMS DCI, Scoops, Forge DVs, ar design catless DPs, Milltek exhaust system, Helix FMIC, Quaife LSD, VK MotorWerks OC Kit, Bilstein B16 PSS10
The ultimate mods' installation thread