Leon993

Im in a great mood today! I passed my emissions test without my catalytic converter. This is the first year I had to update my sticker and I didn't want to have to deal with putting the cat back on just so I could pass inspection.

I do know for a fact that my combustion chamber and my entire exhaust system is squeaky clean. Credit goes to my very high speed driving. I am fortunate to live in a state where there are thousands and thousands of miles of remote roads with no police officers; truly a spectacular place to explore the boundaries of your car. I love not having a cat, I love how the engine breathes and how it sounds. My mechanic says that the overall health of the engine is improved without the cat, he says its like having a potato in your tail pipe.

So much for government regulation huh? Goes to show you that the cat is not essential to pass an emissions test. I'd like to think that having a carbon-free rear end, due to my spirited driving may have something to do with my good news today.

What do you guys think? Can a "no-cat-itallian-tune-up" be a contributing factor?

Feeling great! I passed!

JPP

It's because you went to .... and I quote ... "Whale of a Wash" ..

Viperbob1

I passed with a Turbo that had no cats. Did some tests first as Smog center to see how far I had to turn down my adjustable fuel pressure regulator. Had to take to referee station since they could not dyno car. Just set the pressure a block from the station, passed, then reset it a block away.

Leon993

totally! Its a whale of an inspection! :lmao:

993Brendan

I understand your joy. I put a cat delete pipe on my car last year and was not looking forward to putting the cats back on or having a shop put them back on so I could pass emissions. So, on a whim, I took the car through emissions after a track day and passed with flying colors. I attribute the hard driving at the track the day before to my passing the test.

Ed Burdell

Well done, lads. You're an inspiration to us all!

Leon993

Ed,

Your avatar is the true inspiration here! That kid with a ****-eatin' grin like he's about to hit that tight little package behind him! CLASSIC!!!!

race911

Looking at things realistically, limits of 180ppm HC and 1.2% CO can be easily achieved by any 911 from the CIS era on. And yes that means something like a '74 2.7L version. So it's all about the applicable standards. And in this instance it appears they are extremely lenient. We're not so fortunate in CA.

(I'm not going to debate the merits of running without a cat on the street. Suffice it to say there was about a 10hp difference on Steve Weiner's dyno between stock and cat-less exhausts on the 3.8L in the yellow car when he built it.)

AOW162435

Just took my junker in for the sniff test today as well. Passed.

But I'm still hauling the factory cat around.


Andreas

Quadcammer

high speed driving huh??? LOL

nice visual inspection they did there.

MDamen

Really depends on the state, the testing methods and the standards. Washington reads your OBD2 which will throw a code without a cat, so you can't pass.

AOW162435

Early '95 versions are blessed with OBD1.


Andreas

95 NC 993

Leon993, does NM require emissions testing in the entire state or just in the high population cities/counties? Here in NC the large cities, like Charlotte, have emissions testing yet nothing (except visual) in the rural areas.

Leon993

NC- just in high population areas. In fact, an urban area that borders Albuquerque, but is in another county, does not require inspections for their residents.

inkatouring

You would have passed the tailpipe test in California, too. And our standards are considerably tighter: Idle HC 100 max; CO 1.00. 2500 RPM HC 130 max; CO 1.00.

As to "so much for Government regulations" -- I think cats help clean up the air and that a good thing. Our cars might be built in such a way that makes them less of a pollutant than most generic boxes, but most cars should be muzzled.....