[Christ]

Originally Posted by Duffman

CVCC - Wikipedia, the free encyclopedia
Not sure if it was built in the U.S.A or not but it violates your claim to "Must have a cat" past 75.

Regardless, what I said was, it was not mandated what equipment was required, it was the manufacturers reponsibility to meet the standards of tailpipe cleanlyness the best way they could.

Also, I was not accusing you of calling me arrogant, it is arrogant to say "I am right" as I did, but in this case I am.

CVCC engines were used in the US, yes.

Ok, so they didn't have to install them under law, my mistake. I apparently misread something, or read too far into it.

Back to the original topic that you brought back from I'm not sure how long ago - Yes, it's very possible to tune a vehicle to reach emissions standards without the use of a catalytic converter, even with computer controlled "emissions conscious" vehicles. It does, however, require the full ability to tune the fuel/ignition curves, among other things (hardware tuning) based on exhaust gas analysis rather than desired power output.