[trentmw]

I have a 2011 335i (N55) running MHD Stage 1+ 93octane with FBO. I am looking for some help reading logs and try to determine the low boost cause.

I originally had low boost so I got a boost leak tester and found a substantial leak on the inlet of the turbo. I fixed the leak, pressurized the system to 15psi and no leaks were coming for any external hoses. The only air escaping was coming deep from the engine which I equated to the air going out through open valves into the exhaust. I put the car back together thinking all would be well but was pissed when it was still not generating proper boost levels on the test drive.

I plan on testing for leaks again tomorrow, but for now here is my log to make sure I am not missing some other factor:
https://datazap.me/u/trentmw/low-boost-8nov2018

Thanks

[rich_mane]

The turbo inlet isn't under pressure, it's just the air intake for the turbo. The outlet to the intercooler is where the pressure starts.

Are your vacuum lines all connected properly and in good shape?

[trentmw]

Originally Posted by rich_mane

The turbo inlet isn't under pressure, it's just the air intake for the turbo. The outlet to the intercooler is where the pressure starts.

Are your vacuum lines all connected properly and in good shape?

Good point on inlet. My inlet leak primarily prevented me from pressurizing the system. Once I painstakingly fixed that issue I got to do an actual pressure test. Vacuum lines that I have come across have been in good shape and should be properly connected, but I'll definitely start doing a more exhaustive leak search