good sports car shop in Portland,Oregon?
 

Anybody know of a tuner shop in Portland that you would trust your precious Z to?

Rhom Innovations
Portland Speed Industries
Performance Race Engineering
Forged Performance
COBB Tuning Surgeline

Those are the ones I can think of, there may be more. I only have first hand experience with PSI and Forged.

I have had good experiences with Forged

I had my last car tuned and dyno'ed at PSI. They're pretty good guys and I was happy with their work. I'll probably go back there when I'm ready to have my Z tuned. I know they use Ecutek but I'm not sure about Uprev. They have a beautiful facility and their shop area was full of really nice customer cars they were working on. Pretty good customer service too.

Had my exhaust, CAI, and tune done at PSI in Hillsboro, right off US 26. They did great work, and the shop manager JJ has a black 370z as well, knows his stuff.