[N0DIH]

The only issue I seem to remember from intercooling is too large, lag, too small, boost restrictor. To matching is sort of important. I guess the way to know if determine the airflow going through it. A 3.0L at 6500 rpm (guess here) with 15 psi boost may be the same airflow (guess here!) as a 5.0L and 5 psi. No idea for sure. I will find what I can and post it. Good questions. The GN guys may be able to help. A GN intercooler may work, as it is a single for a 3.8L and 15 psi boost. Sounds like off the top of my head (not balding...) that it might be a closer match. And with it being GM, has that "great GM feeling" Maybe even pass it off as factory SEO option.

As for impeding boost, the 301 Turbo was BAD for that, the bends and twists were terrible. BUT, it DID make boost at 1200 rpm. Tell me, how many cars out there make boost at 1200 rpm? And full 7.5 psi at 2200 rpm. Note that full stall speed was NEVER reached, the back brakes could never withstand it. Any positive boost was instant tire smoke, and that was lame 3.08 gears! (wimpy 9in rear drums)

GN guys often sell used factory turbos for cheap, you can get the A/R figures easily from GNTType.org.

I'll do some digging tonight if I can get on the computer for a bit....

Let me know what turbo you are playing around with. And look and see what the specs are. And with many turbos, parts like compressor or exhaust housings can be mixed and matched....

Tom