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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > JB4 Data Log on N55



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      05-30-2016, 03:35 AM   #1
CRZY BMW
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JB4 Data Log on N55

Do these look normal for a stock 2012 335i N55 with a JB4 on map 1?



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      05-30-2016, 08:48 AM   #2
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Very informative for newbs. Logs should be done in a single gear (usually 3rd) from 2k to REDLINE. Sometimes I will do logs starting in 3rd and through 4th when I want to see the learning curve of map 5 since map 5 learns in 3rd and 4th only above 4k.

http://www.n54tech.com/forums/showthread.php?t=21269
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      05-30-2016, 01:21 PM   #3
Turbod
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Quote:
Originally Posted by CRZY BMW View Post
Do these look normal for a stock 2012 335i N55 with a JB4 on map 1?
No they do not. Boost is oscillating pretty bad. You can see spikes up to around 15 psi. Your timing would probably look better once you get the boost oscillation fixed. I assume this is with the regular board and not ISO?
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      05-30-2016, 06:32 PM   #4
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I'm guessing you were having traction problems. If not, you need better gas.
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      05-31-2016, 03:45 PM   #5
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Sorry if hijacking (same title but different car?)
how about these?

very first one (05-27)

and todays..

Few RPMs short of redline.. 3rd gear - ran out of room in both cases.

Thanks!
Attached Files
File Type: zip 2016-05-27 11_21_43.zip (2.4 KB, 57 views)
File Type: zip 2016-05-31 13_02_59 (map 1).zip (2.1 KB, 54 views)
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      05-31-2016, 09:21 PM   #6
weehe126
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Quote:
Originally Posted by maxihari View Post
Sorry if hijacking (same title but different car?)
how about these?

very first one (05-27)

and todays..

Few RPMs short of redline.. 3rd gear - ran out of room in both cases.

Thanks!
Either post a JB4 log or a datazap link. Also, make your own thread.
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      05-31-2016, 10:32 PM   #7
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well that is jb4 log, but zipped since system informed me .CSV file extension is not allowed type.
But will try again.

thx
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      06-01-2016, 12:10 AM   #8
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datazip
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