MBC Problem, please help!

[turbospyder19]

I've searched around, but I have never heard of this problem before. I just installed my homemade MBC and after setting it to what I thought was about 14 PSI, I noticed that in 4th or 5th the boost would spike to 15, then creep DOWN to zero! Has anyone ever had this problem? Any help with this issue would be greatly appreciated!

 

[psychlow]

To what RPM are you going?

Most T25's aren't big enough to boost much at higher RPMs on the 4g63...

 

[DSMSpyder99]

Originally posted by psychlow
To what RPM are you going?

Most T25's aren't big enough to boost much at higher RPMs on the 4g63...

yes they do go down in higher RPM but not to zero. My guess is you didnt construct your MBC well enough and its leaking

 

[turbospyder19]

Well, the gauge never got to zero, it was heading in that direction though. It actually got to about 5 PSI and it was in the higher RPM's. I don't think the controller is leaking, I tightened it securly and used teflon tape on all the threads. Im thinking it;s becuase the T25 is so small, so I'll deal with it until I get a 16G. Thanks for the help!