Hey guys, it’s been a while but I’ve finally gotten around to working on this issue (was dealing with other things and work matter)
anyways, since I’ve put a pause on the issue with the high oil consumption for now(since looks like it will require to rebuild the engine head), I decided to tackle the boost issue.
Like I explained to
@ROH ECHT on the other post, working on the car recently I noticed there was a small leak coming out of the MAP sensor bung, looks like the hole on my aftermarket tb pipe was too big for the oem o-ring on the sensor and wasn’t fully sealed, so what I did was I was able to find a slightly bigger o-ring (about 0.5 mm more) and replace it, this took care of the leak, I don’t see any more oil or methanol coming out of there (I have a water/meth injector bung right before so that’s what helped me notice it),however, this didn’t fix the boost drop issue.
So next, I did what both of you guys,
@ROH ECHT and
@Chumeta , suggested, added 1.5mm of preload to the wastegate actuator rod.
The results weren’t quite what I was expecting unfortunately, the boost stayed the same (~22.5 psi), however...one thing that did change was I was able to hit peak boost again when downshifting and opening up the throttle above 4K rpm, I was even able to peak at 26 psi when doing this, also...in 2nd gear I’d peak ~24 psi which id say is better than before, but the rest of the gears still the same when trying to build boost gradually, it never finds that peak...unless like I said, I downshift and apply throttle in high rpm and the boost spikes to 25-26 and drops back down to ~22.5 psi and holds it steady there....before I could do this without having to downshift.
What can you guys suggest?