boost lose

[redrocket95]

alright guys so this is the deal, i got my car tuned to 18 pounds in may, a couple of days ago i noticed that i haven't been getting the whole 18 pounds.
i did a boost leak test, no leaks were found.
at first i realized that 2nd gear would only reach 7-9 pounds by the time i hit redline at most. i turned up the boost by ALOT, and i mean alot, way past 25 pounds( i cant tell for sure because i have a manual boost controller but i made probably around 6 whole turns). after i "turned up" the boost it only went up to 11 pounds by the time redline hit. boosts builds up pretty slow, for sure not like it used to.
i might have an idea what might be the reason for this, can my external wastegate be stuck open not allowing he boost to build up much? even thought i hear the external wase gate open during full spool?
other than that i really dont know what can cause this, any ideas would be much appreciated, thank you!!

 

[blue6gen]

Are there any signs of an exhaust leak by the turbo or manifold? What have u been tuning with?

 

[redrocket95]

i got it dyno tuned with the S-AFC by Apexi, the car has been tuned with that even before i bought it. and no, no leaks by the turbo mani or the turbo.

 

[dsm03]

Do you have a logger, see whats happening

especially if its happening only in second gear, BLT a second time maybe

 

[Achelea]

Any shaft play?
What's your oil look like?

Part of me is wondering if the bearings are going out.. Not enough to leak, but enough to start dragging.

 

[redrocket95]

its not only in 2nd gear, i was just using 2nd as an example.
but tonight on a relativity cool night it was actually boosting pretty nice, ive hit 15psi for sure a couple of times tonight.

and Achelea your speaking about the turbo bearing correct? and if that's the case, would i be able to rebuild the turbo? or am i a$$ed out?

 

[blue6gen]

Pull your iintake off and check for any movement in the shaft and do anothe blt just to be sure. What r u doing to test for leaks?

And yes, if your turbo is shot you can rebuild it.

 

[ross4g63spyder]

boost leak test