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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > jb4 1st gear boost only 5lbs??



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      03-30-2013, 11:10 AM   #1
blackbeast06
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jb4 1st gear boost only 5lbs??

I have been running a jb4 G4, dp's, and dci for a year now. When running logs in third gear I am hitting ~15lbs of boost and the logs look clean. I have noticed though that first gear just didn't seem to have the same kick as the other gears. Well I finally turned on the boost on fuel gauge and noticed that I am only hitting about 5lbs of boost in first gear. The jb4 is set to map 5. I know that there is a boost limiting setting you can set the jb4 to in first gear but I did not set that parameter. Is this a function of map 5 or may this be another issue?
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      03-30-2013, 11:23 AM   #2
AltecBX
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I believe is a setting in the user adjustment software you can change for 1st & 2nd gear. Is there so you get better traction.
I wouldn't recommend putting it to high as you'll be over 1st gear after 20mph.
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