1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

cheating the smog system

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Old Jul 24, 2005 | 03:45 PM
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From: 707
Exclamation cheating the smog system

hey fellas my friend has an sr20 det on his 240sx and i am planning to drop a 13bt engine in my car sometime next year . but he asked me if i knew any one that can cheat the smog system or whatever . but i dont know if you can cheat the dyno test . soo any body know a way to cheat the smog ???
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Old Jul 24, 2005 | 11:28 PM
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pay some extra $$$ to the tester usually works.
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Old Jul 25, 2005 | 02:10 PM
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get a car made before 1975.... no smog test at all!
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Old Jul 25, 2005 | 06:10 PM
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Originally Posted by OSI
get a car made before 1975.... no smog test at all!
hehehehe. One of the pleasures of owning a 74REPU.

B
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Old Jul 25, 2005 | 07:16 PM
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From: hoosier state
move somewhere without smog testing




like good ol' indiana
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Old Jul 25, 2005 | 07:22 PM
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you got to get 'connections'

allways remember that the sr20 is an illegal engine in the USA. I heard that most stateies like to check engines. well I only heard that that was true in cali.

1) marry someones daughter thats got a 'shop'
2) ask about extra bonus money for 'quick sticker'
3) gun point
4) early modle vehicle.
5) give a shot over 2000 grand to fix it.. legaly
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Old Jul 25, 2005 | 07:25 PM
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Use a different address for your licensing of the car in a part of your state that doesn't require emissions test. Worked for me on my truck. Also it doesn't say where your from but in Washington if your car is 25 years or older, you don't even have to take an emissions test because of some grandfather out.
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Old Jul 25, 2005 | 09:56 PM
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i heard there is another way , by having a worker in the dmv give u the tags soo u wont have to do any smog test . but iono .
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Old Jul 25, 2005 | 10:49 PM
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nice 1stgen thread....lol....
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Old Jul 25, 2005 | 11:40 PM
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From: Ottawa, Soviet Canuckistan
It's sorta relevant

In Ontario, cars older than 20yrs are emissions exempt. So my car being an '84 is now emissions exempt.

If you unfortunately can't fall under that clause (or are in a place where the limit is 20+ yrs) then there's the second way out. Again, in Ontario, if you fail you have to make up to $350 worth of repairs to get a "conditional pass". They figure you'll do $350 this time and if you fail, you'll spend another $350 in two years, etc....

So when they fail you, go to Mazda, get a quote for the catalytic converter (alone and including replacement labour). Go back to the place and show them that to replace the cat would cost you (insert obscenely huge Mazda number in the thousands here). Convince them that there is nothing $350 will be able to buy for your car (other than a set of headers and a straight pipe... don't tell them that).

If you're lucky, they'll let you off because of the fact that your car is nearly impossible to find parts for and will throw you over the limit.

I just live across the river in Quebec, where there is no emissions testing.

Other than those legal ways, you'll have to do something shady which I cannot recommend.... but if you do manage it, power to ya.

Tricks for passing the sniffer:
- Make sure your car is completely tuned up. I mean completely. Check your timing, replace your fuel filter, air filter, oil and filter (don't forget, our cars mix oil in too!), spark plugs, spark plug wires, dist cap and rotor.
- Run a few tanks of fuel line/engine carbon cleaner. If you can, buy ethanol blended gas
- Check your mixture. If it's too rich, you're sure to fail. If it's too lean, the mixture won't combust and you'll get the misfired ones dumping straight fuel/air into the exhaust. It should be just a *little* leaner than it's normally supposed to be
- Run ethanol-blended fuel the day of the test. Add some extra stuff from your parts store like "guaranteed to pass emissions magic fuel additive in a bottle"

And if you have stupid mechanics doing the check, you can always bypass the ACV and plumb the Air Pump straight into the cats. "The solution to pollution is dilution". They're taking samples based on "parts per million". If you introduce 400,000 parts more air, that should help

Jon
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Old Jul 26, 2005 | 01:45 AM
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Originally Posted by OSI
get a car made before 1975.... no smog test at all!

Get it right at least. its 75 and below for CALI. in other words, pre-76 are smog exempt.
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Old Jul 26, 2005 | 06:32 AM
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Originally Posted by apexwarrior
you got to get 'connections'

allways remember that the sr20 is an illegal engine in the USA. I heard that most stateies like to check engines. well I only heard that that was true in cali.

1) marry someones daughter thats got a 'shop'
2) ask about extra bonus money for 'quick sticker'
3) gun point
4) early modle vehicle.
5) give a shot over 2000 grand to fix it.. legaly
Number 3 for the win Trebeck.
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Old Jul 26, 2005 | 01:27 PM
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From: 707
how bout this , since smog is now dynoed . how bout if i get another fb that can pass the smog and the smogger can just put my vin number or watever. can that work
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Old Jul 26, 2005 | 02:28 PM
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If you wanna have one for "street" and one for "race" that's okay.

Switching VIN plates isn't legal Doesn't mean you can't do it, just means you shouldn't.

Jon
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Old Jul 26, 2005 | 02:50 PM
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From: Socal
Originally Posted by a13btrx7@hotmail.com
how bout this , since smog is now dynoed . how bout if i get another fb that can pass the smog and the smogger can just put my vin number or watever. can that work

they aint dumb *****. Just make friends, sooner or later, you will find someone who knows someone etc etc
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Old Jul 26, 2005 | 04:38 PM
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you can also plum the air line off a airpump into the cat.

a friend of mine thats got a '88 n/a has 2 exhaust systems and also replaces the air pump when he need to get tested.

in massachusetts if your car is +20 years your ok for smog.. meaning pre 85. IF you buy a car and its a new register.. 20 years and younger cars.. you must get smog pass if not you must return the car to the previous owner for repairs (upid lemon laws)
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Old Jul 26, 2005 | 05:07 PM
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Originally Posted by wackyracer
Get it right at least. its 75 and below for CALI. in other words, pre-76 are smog exempt.
Even though good old Arnie put a stop to the rolling 30 year exemption in CA, I keep hope that some day, maybe 10 yrs from now, they will move it up so that pre 86 will be exempt. And they can hold it at that for all I care, I like to keep my Mazda's 85 and earlier
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Old Jul 26, 2005 | 05:09 PM
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Originally Posted by vipernicus42
If you wanna have one for "street" and one for "race" that's okay.

Switching VIN plates isn't legal Doesn't mean you can't do it, just means you shouldn't.

Jon

I wonder how many smog guys actually check the vin under the hood with that on the reg card. Where I go, they just zap the barcode on my reg and look at my plate. If I was careless and accidentally put the wrong plate on my smog legal car...............
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Old Jul 26, 2005 | 05:21 PM
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From: 707
well the engine that i was planning to put on my car s a jspec turbo 2 . which i hear they cannot pass our smog emissions .
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Old Jul 26, 2005 | 05:35 PM
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Originally Posted by a13btrx7@hotmail.com
well the engine that i was planning to put on my car s a jspec turbo 2 . which i hear they cannot pass our smog emissions .

Just pump the airpump straight into the cat and it will pass the sniffer, visual is a different story.
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Old Jul 26, 2005 | 07:45 PM
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thats all i have to do.
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Old Jul 29, 2005 | 01:19 PM
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theres a thread.. do a search
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