Definitely that smaller intercooler. Wasn't that already discussed in your other thread?

 

Did you have the new intake and the new heads on with the old set up when you were seeing those boost psi? Also what ^^^^ said..

 

Yes. The only changes were the intercooler, piping and 80e. The heads cam and tbss intake were already there. Several things were discussed in my other thread. But I should still be seeing a lot more boost at 6500 with a smaller pulley and higher shift points

 

Its either leaking on the cold side, the intercooler is choking it, or you have belt slip.

 

Ditch that intercooler and see what happens.

 

Universal Bar Plate Aluminum 3"Inlet Turbo 31"X12X4"Fmic Front Mount Intercooler | eBay
How's this one? Will it fit behind the grill of my c3?

 

Its all in the tune man!!!

 

Ordered the cxracing 31x12x3 intercooler with 3" inlets. Should be a huge improvement. Should be here Saturday

 

I'm going with belt slippage too.

 

But with the 3.6" pulley and 6700 rpm I should be seeing at least 16-17 psi I'm going to swap the 3.85" pulley back on when I get the new intercooler mounted and go from there