kARLUG
Enthusiast
Thinking about removing my cats. I live in Nevada where they do the sniff test.
Maybe a dumb question but do you think I would pass?
Maybe a dumb question but do you think I would pass?
No Cats - Smog??
- Thread starter kARLUG
- Start date
Ulysses
Enthusiast
I hear Vipers burn pretty clean, but you're taking a chance.
prm06
Enthusiast
I doubt that it would be possible to pass without some type of catalytic convertor on the car.
I don't know if you can do it with a Viper, but I used to have a 95 Mustang, and a guy on a Mustang forum said that he passed the California emissions by retarding his timing a lot. Stock was 10 degrees BTDC, and he had it like 5 or something. The car barely ran, but he did pass the sniffer.
Russ M
Enthusiast
Yes your $250.00 at the right establishment will make all the difference. 
Ulysses
Enthusiast
Bingo!! We have a winner!
GTS Bruce
Enthusiast
Just make up a straight pipe that clamps on and remove then clamp back in the cats when you need a smog run. GTS Bruce
Be careful though...don't run with the timing backed off for very long or you'll heat up and burn rings.....if you're going to try it I'd do it right around the corner from where you get sniffed. Low probability of passing and risk of damage if you sputter too long. Just my 2 cents.
GimmeTheSpeed
Enthusiast
Not sure about NV, but here in CA you also have to pass a "Visual" test... you will not even make it up on the dyno without cats....
OR.... At least something that looks like cats...
I wonder if your normal corner-garage that does CA-smog tests will know what a Viper cat should look like, anyway? I just got my truck smogged last week (first I've had a smog done since they instituted the mini-dyno test), and I watched him pretty closely, and he never looked under the car. But, granted, they are supposed to visually check for all emissions components.
Ulysses
Enthusiast
I know the place I took my other cars to looked under the hood for special surprises.
