Portland OR smog check question.
 

The metro Portland area has smog checks for vehicles from 75 and up. An 83 has to comply with the 220 ppm HC and 1% CO per the DEQ website.

My question is on engine replacement. How do they determine compliance? Assume intact cat and intake system on a good running 964 engine.

thanks in advance.

They stick a sniffer up the tailpipe as the car idles. No visual check. No check at higher rpm. Don't care if there is a Merlin 12 cyl under the hood. That is my experience after 3 trips to DEQ, including a vehicle with a completely transplanted engine - the guy noticed that wasn't a VW wasserboxer in there and we had a nice chat about the merits of different conversions.

yes this has been my experience too-

Oregon is NOT like the land to the south-

Oh re-he-he-heeeallly? Hmm...roadtrip.

1% Co is a car running a little rich with a decent cat. A bad cat will affect this first.
220 HC is high and you'd have to have oil/fuel fouling, or pull a plug wire on a cold engine, to get close. Should be no problem there.

If the tailpipe doesn't make your eyes water, you should be good.
Test a warm engine after a good highway jog.

Who's a good indy wrench near PDX?

I got a couple recs from the PNW forum, Steve Weiner rec'd Marque Motors on SW MacAdam, I used them, they were good, and the shop is old-school. I don't use a mechanic much but that's my place from now on.

I get a mirror check at DEQ on the 911 in addition to the sniffer, but I have a fabspeed test pipe and it's managed to pass as a catalytic converter so far. (Its kind of chubby in the middle). I've still got the cat in a box if I need to.

Don't know a good mechanic in Portland. Never found one. Steve Weiner over at Rennsport is always too busy for my stuff, but he probably knows someone.

Neither do I, just was curious who was competent...