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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 Boost issues and high altitude...



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      08-04-2012, 08:54 PM   #1
slostjoe
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JB4 Boost issues and high altitude...

Ok so I have a 08 335i 6spd with FMIC, DCI's and JB4. No matter what map I'm running well 1,3,5 it spikes 18psi and holds around 15psi. I run 93 octane where I live at sea level so it wasn't to concerning, however I am traveling to the rocket mountains tomorrow and I will be at times 12,000ft above sea level and they have crappy gas there. I was hoping to run map one but wasn't sure how safe this would be.

Thanks for any advice ahead of time!
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      08-04-2012, 09:40 PM   #2
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This is the wrong section. Post in the N54 section and you will get better reply's. I would log your car and send them to Terry.
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      08-04-2012, 10:04 PM   #3
slostjoe
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Crap. Stupid mobile app!
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