JB4tech.com - International Turbo Tuning Discussion
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Beamerman Beamerman is offline
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Posts: 12
Join Date: Feb 2020
Car: 2008 bmw 335i
Default Overboosting to 30psi! - 12-24-2021, 07:00 PM

Solved.
Bad vacumn solenoids.
Caused vacumn to leak by and keep wastegates all the way closed all the time. Installed good solenoids and all is well.

2008 135i convertable
90 percent sure the turbos are upgraded
7.5 intercooler
Tial bov
Upgraded chargepipe
Dual cone intake
Upgraded inlets and outlets
Stock *********
Jb4 with hybrid race backend flash
Map 4
N20 3.5 bar pressure sensor
91 octane pump gas
I think pressure might be getting into the coolent system because the radiater blew then after replacing the radiater there was another coolent leak.
Why am I hitting 30 psi?
I changed pid gain from 25 to 10 and no change.
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Last edited by Beamerman; 12-25-2021 at 11:32 PM..
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Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
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Car: E92 335XI
Default 12-26-2021, 09:12 AM

Glad you got the issue resolved.

Also, just pump gas / hybrid turbos, use the stock turbo pump flash.


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