t25 too much boost

[2gGst98]

ok so I removed the bcs restrictor on my gst a few weeks ago, and began hitting about 20 pst then drops at higher rpm's. I know this happens to a good amount of people, how did you guys fix it?

I got a MBC over the weekend and I no its hooked up right. I have no leaks besides a tiny one in the TB. Why am I spiking up at 20 then comming down to 12 at about 4.5k - 5k.

I have done alot of reading the past 3 days and I cant find anyone giving a cure to this. So if someone can help me out by either telling me or showing me a link I would appreciate it.

 

[jtmcinder]

Sorry for the misunderestimation, as a previous Preznit would say.

 

[2gGst98]

So yea back to the question . Would running my compressor to the waste gate tell me if its bad or not? If not I will put some air to it and see at what psi it moves at. But tomorrow I will eliminate the MBC.

 

[miguelmcv]

No, It is not bad, that's the way it should be hooked up.

 

[Aproductions]

1. Cap off the BCS (both nipples)
2. Hook a vac line from the waste gate nipple to the compressor housing nipple.
3. Drive the car and see if boost is normal
4. If it does, you had the MBC hooked up wrong
5. If it isn't boosting normal there is a problem with the wastegate

Other notes, check the vacuum lines on the boost gauge (check to see if pinched somewhere).

Goodluck.

P.S. shorten those MBC lines!

 

[2gGst98]

Ok so I hooked up the comp. to the waste. and it went to 13-14, so I am going to shorten up the vac. lines to the MBC and that shuld do the trick. But thanks for all the quick replies, you guys help out alot.