LB7: Low Boost

[WisconsinHick1]

Well after a good beginning of the pulling season for me I was seeing 50psi and EGT's wouldn't go past 1600˚. My pull this weekend I couldn't get past 30psi and EGT's were getting close to 1700˚.

My sponsor figured turbo so I pulled the intake off and didn't have any in and out shaft play and very very very minimal side to side but it wasn't touching the inner shell at all. Still spins freely and not oil in the boost tubes.

I am thinking a boost leak somewhere aka stock intercooler. I will be bringing it up to the shop to have the boost tubes and intercooler put under pressure to see if I have a leak.

Anything else I should be looking at?

 

[duramaxzak]

Eric, can't you loose boost psi if an up pipe is leaking also?, maybe a crack or gasket leaking.

 

[Dirtymaxx03]

I bet that stock intercooler is the culprit. You aren't running a stock drivers side intercooler pipe are you? Cause I know the hard brake line on the frame rail rubbed a giant hole in my intercooler pipe.

 

[DBUSHLB7]

All them stock LB7 intercoolers leak. About to have mine welded as well.

 

[WisconsinHick1]

I am running a modified stock drivers side IC pipe but we placed an extra piece of aluminum over the spot where it rubs.

That is also possible Zak. The turbo will be coming off if the pressure test doesn't show anything.