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Old 03-23-2017, 09:52 PM   #1
levik
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Default V8 swap and emissions

Brickers,
What do you do to keep your LS swaps emissions legal? 2 front cats?
Thanks in advance
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Old 03-23-2017, 10:06 PM   #2
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Depends what state you are in
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Old 03-23-2017, 10:11 PM   #3
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....and how old the car is....
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Old 03-23-2017, 10:16 PM   #4
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Originally Posted by cosbySweater View Post
Depends what state you are in
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Originally Posted by M.H. Yount View Post
....and how old the car is....
Yup.

My 1975 242 is exempt from any emissions testing. Or safety inspections. Horray!

Basically, I can do whatever the hell I want with that car, in whatever state of disrepair that I want, until a cop notices and I get ticketed. Or possibly arrested for endangering the public, depending on the details.

And people say that California has too many rules. LOL
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Old 03-23-2017, 10:52 PM   #5
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I'm in Maryland the car is a '92
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Old 03-23-2017, 11:01 PM   #6
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pay some one off till the car turns 25 in a year
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Old 03-23-2017, 11:04 PM   #7
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only pre '77 cars are exempt
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Old 03-23-2017, 11:23 PM   #8
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Move to southern Virginia, Delaware or West Virginia?
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Old 03-23-2017, 11:27 PM   #9
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.
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Old 03-23-2017, 11:56 PM   #10
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I'm in Maryland the car is a '92
How do they smog cars in Maryland? Here in Oregon they sniff test and see if you have a Cat. Cars that are 1995 and newer they plug in check for engine lights.
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Old 03-24-2017, 12:03 AM   #11
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Yup.

My 1975 242 is exempt from any emissions testing. Or safety inspections. Horray!

Basically, I can do whatever the hell I want with that car, in whatever state of disrepair that I want, until a cop notices and I get ticketed. Or possibly arrested for endangering the public, depending on the details.

And people say that California has too many rules. LOL


What about your 83?
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Old 03-24-2017, 12:57 AM   #12
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x2 GTFO of MD!

FWIW in GA my old 911 would pass smog without a kitty. The regulations are probably dependent on car age and standards during the time of manufacture. With the efficiency and O2 sensors on a modern LS, I would not sweat emissions testing.
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Old 03-24-2017, 01:06 AM   #13
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Go to Maryland DMV website, if like CA and other states it all there in black and white. Safer better than some stranger on the 'net.
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Old 03-24-2017, 01:06 AM   #14
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Quote:
Originally Posted by slammed145 View Post
Yup.

My 1975 242 is exempt from any emissions testing. Or safety inspections. Horray!

Basically, I can do whatever the hell I want with that car, in whatever state of disrepair that I want, until a cop notices and I get ticketed. Or possibly arrested for endangering the public, depending on the details.

And people say that California has too many rules. LOL
No you can't pre 66 you are supposed to ref. Look it up
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Old 03-24-2017, 01:21 AM   #15
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Originally Posted by cosbySweater View Post
No you can't pre 66 you are supposed to ref. Look it up
Probably true, but I don't know why anybody would voluntarily take their swapped 66-75 car to the ref for an inspection. Your chances of getting caught, especially by somebody who knows the law that well, are probably pretty slim.
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Old 03-24-2017, 03:56 AM   #16
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Quote:
Originally Posted by Jack View Post


What about your 83?
It's a post-1975 so it needs a smog certificate twice a year, so the engine is stock. It's not that complicated.
Don't roll your eyes at me, son.

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Originally Posted by cosbySweater View Post
No you can't pre 66 you are supposed to ref. Look it up
Not true.
VIN 2004-11 states as follows:
"Effective April 1, 2005, all 1975 and older vehicles, including vehicles previously registered in another state, are exempt from smog certification requirements."

I had to print all this shiit out and bring it to the DMV because my local guy didn't know about this. I also had to print out all the paperwork required to keep my original blue plates. It pays to do your own research, study it, and be able to show your DMV clerk what's up. Most often, they just need a regulation number in order to reference just to cover their ass.

That being said, any car needs to have at least the smog equipment that it came installed from the factory. Which means my '75 needs a charcoal canister to capture gas tank vapors, and that's about it. Everything attached to the engine exceeds what it originally came equipped with.


I don't have a clue what you need in Maryland. Bust out the googles and do some research.
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Old 03-24-2017, 07:49 AM   #17
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I worked for the US EPA for 31 1/2 years doing vehicle emissions so I kind of know this stuff. Someone already posted the real answer - it depends on the state. EPA sets the standards for new cars and works to assure that cars as built meet them. The states are responsible for making sure that their ambient air quality is acceptable so they set the state standards and the rules for Inspection and Maintenance, etc. EPA does give states some guidelines (because several states claimed they didn't have the expertise to do that) but many states follow different standards - witness California.

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Old 03-24-2017, 08:02 AM   #18
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Historic tags= No emission testing in Md, but you are limited on how much you can drive the car.
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Old 03-24-2017, 08:19 AM   #19
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My thought was a single cat after "Y" .
Will cross that bridge when I get there
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Old 03-24-2017, 02:36 PM   #20
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The 347 SBF stroker/Volvo I'm building has 2 cats, 1 per side shortly after the headers. They were installed for the original 5.0 swap about 20 years ago and and still seem to be working as the exhaust doesn't stink up the shop too badly. They seem to be aftermarket cats and evidently are holding up OK.

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Old 03-24-2017, 02:51 PM   #21
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Quote:
Originally Posted by thebornotaku View Post
Probably true, but I don't know why anybody would voluntarily take their swapped 66-75 car to the ref for an inspection. Your chances of getting caught, especially by somebody who knows the law that well, are probably pretty slim.
Pretty much, but I will say this 66-75 exempt from inspection but not the smog laws, you get a cop that's a asshat and you could potentially be screwed if he knows the law
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Old 03-24-2017, 02:55 PM   #22
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Missouri and a 1993 car means no emissions testing at all. Possibly a visual inspection for a cat, but I've never tried my luck on leaving it off for an inspection.

NOTE: I don't have a V8 swap yet, but I'm slowly gathering parts and continuing to enjoy my 16VT motor in the meantime.
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Old 03-24-2017, 03:26 PM   #23
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Quote:
Originally Posted by JohnMc View Post
Missouri and a 1993 car means no emissions testing at all. Possibly a visual inspection for a cat, but I've never tried my luck on leaving it off for an inspection.

NOTE: I don't have a V8 swap yet, but I'm slowly gathering parts and continuing to enjoy my 16VT motor in the meantime.
Continuing to enjoy removing it?
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Old 03-24-2017, 03:56 PM   #24
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Quote:
Originally Posted by slammed145 View Post
It's a post-1975 so it needs a smog certificate twice a year, so the engine is stock. It's not that complicated.
Don't roll your eyes at me, son.
once every two years papa
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Old 03-25-2017, 10:36 PM   #25
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Colorado: My car passes emissions every two years on rolling dyno test. Dual exhaust, so dual cats.

Only 1975 and older are emissions exempt.
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