[kyle_rg85]

Hi guys, need some help figuring out what's up with my boost issues. As you can see from the log, boost initially gets close to target, then drops down and then ramps back up to target. It does the same thing in all maps, even map 4 with stock boost. Have tried turning the BEF off, same thing. I don't think I have any boost leaks, car spools fast and makes great power when the boost finally reaches target. Also, the car feels like the boost is not very smooth sometimes at part throttle, you can feel the power fluctuate. I have also played with wastegate settings on map 10,11,12, no changes no matter what I do. Here's my setup:

-335i auto
-JB4 with MHD hybrid BEF
-Dynamic Autowerx stage 4 turbos (had stage 2 turbos before, boost is doing the same thing)
-New vacuum lines
-Replaced boost solenoids with OEM units
-Have vacuum canisters still installed
-Full bolt on (intercooler, turbo outlet, inlets, charge pipe with Tial BOV etc)
-water meth injection

Any idea what could be causing this? I have friends running the stage 2 turbos with OTS tunes, their logs look just fine.

Thanks for any help!


Link to full log:

https://datazap.me/u/kylerg85/map-1-...log=0&data=1-4

[kyle_rg85]

I think I got it sorted out. Used map 6 with hybrid turbo settings and boost seems to be close to target now