John Row

First of all it passed, no sweat.

I'm just wondering what the numbers are telling. These are the 25MPH numbers.

CO2% - 14.80
O2% - 0.20
HC(PPM) - 18 (avg - 13)
CO% - 0.01 (avg - .05)
NO(PPM) - 513 (This was the only number that was way above the average of 136)

Thanks,

TIMSPEED

Isn't that funny? My 87 also passed the CO% @ 25mph with 0.01...that's CLEAN, I would imagine? LoL. Be glad you passed :D It's funny with my vette, a year prior to me buying it, it passed the smog test, then when I smogged it a year later (no changes, except maybe new plugs/wires/ignition) it passed 100x cleaner!! :crazy:

Wadoka

Looks great to me. My NOx is about half as high as yours, but I'm in an area that just uses a tailpipe sniffer with an idling car in park.

CorvetteZ51Racer

Looks good overall. The high NO emissions indicate that you're running a little lean at the 25 mph load that they were testing at. However, for cruising around at a constant speed, that's fine. I'd be happy with that, especially the CO number.

John Row

it was funny. One of the eco-freaks at work always harrasses me about driving a gas guzzling polluter (good naturedly, razzing). I challenged him to bring in his smog test on his 98 Honda Civic (75K miles)

Except for the NO reading, the Vette with 150K beat his "green" car :D He's been very quiet since.