Port or not to port stock NA
 

I currently have a friends 89 vert engine apart. It had 180k on it but the oil control o-rings dried out and smokes too much. My question is that the car will remain stock, maybe an intake. Is it worth my time to port the engine. I have seen the mazdatrix porting template and it enlarges the primay port a lot, but it does not change the opening side of the port. I will be using fd rotor housings because i cant find any na ones. So since it will be stock will a street port give it any more noticeable power. I was thinking i should just smooth out the ports.

If your in Cali I'd suggest just cleaning up the ports a little bit. I'm guessing you have emissions to deal with. If not, a mild porting job and a stand alone EMS will do wonders if properly tuned.

Yeah, we have emissions testing in Cali, so the car will run all its cats. I just wondering if i full street port will gain any power with the stock restrictive exhaust?

yes there is a noticable difference in power, nothing extreme but my NA is streetported and I noticed that it pulls pretty well through the whole powerband up to redline

Are you running the complete stock exhaust system, including the cats?

Yes!

your gunna choke the hell out of it.