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View Full Version : SBC Conversion CO Emission Questions


NameAlreadyTaken
03-08-2013, 09:37 PM
First Post...I hate to start it off this way, but I'm in a pinch.

I am currently in the process of a SBC (TBI) conversion on my 1973 FJ40. I just ordered the EZ body harness and was about to order a Howell TBI Harness when a question arose. What to do about the emissions?

I currently live in El Paso County which does not require an emissions test. However, I plan to move to an area this spring/summer that does require one.

Since I will eventually (in 5 years when I have to renew the collector plates) have to get an emissions test, I am wondering what emission/smog items I will need to pass emissions? Right now, I don't have or know anything as far as emissions go. Are there parts I need to get from the U Pay U Pay yard from a donor TBI vehicle?

Any help will be more than appreciated.

Charley
(I'll post some pics when I get a chance)

rockrod
03-08-2013, 10:07 PM
It's simple, you need everything that is emissions related from the donor vehicle installed and functional on your 40. Most struggle with the EVAP system but IIRC the tbi set up is pre-OBD so it should be a pretty easy process. Howell should be able to tell you want you will need.

nattybumppo
03-08-2013, 10:43 PM
Colorado no longer tests emissions on vehicles older than 1975. You should be able to renew without another test...

spectre6000
03-09-2013, 10:39 AM
They still test if you want regular tags (which I prefer), just not as thoroughly.

Yeah, '73 you're good. My '74 is rock stock (including emissions equipment that may still function), but would have passed easily without. On the whole, emissions equipment are just devices that make the ability maintain and tune a car less than necessary (though there are exceptions). You can have a crappy tune and still be relatively clean running. When I had mine tested the HC limit was (and I'm sure still is) 1000 PPM... I came in at 14 PPM. This was tuning by ear (though I was a little lean in the slows).

If you tune it anywhere near where it should be, you shouldn't have any issues whatsoever. I'm hoping to start a wideband revolution in the LC universe, but need more fuel economy data to make my case as the subjective benefits (performance, engine note, feeling of satisfaction knowing that your machine is as good as it can possibly be) are not very communicable. I have been getting 14 mpg with locked hubs and nasty weather though, and I think 15 mpg will prove the average 9 months out of the year. Not great by modern car standards, but beats the hell out of the 11 I was getting and the single digits I keep hearing about.

euroford
03-09-2013, 11:00 AM
They still test if you want regular tags (which I prefer), just not as thoroughly.

I don't really follow that you find that as a preference. i can understand not wanting your vehicle to be a polluter and choosing to maintain the emissions equipment, by why would you 'prefer' to have 'the man' look up under your rigs skirt once a year and decide if she's good to go or not??

fwiw, i'm not knocking your choice, its yours to make. i just don't get the upside that you see with it.

i am ALL ABOUT the antique plates. they look cool, you save your own time and money by not having to do the emissions test, my libertarian sensibilities love not having to subject to a government agency for approval, you can do what you want with your motor, and you don't have to worry about registration for 5 years at a pop.

i suppose some could see the 5 year reg as a downside, but it doesn't actually cost anymore assuming you keep the rig for 5 years.

RedCreeper
03-10-2013, 04:31 AM
Hate emissions, nuff said. Had to sell my toy cuz of it. avoid if possible.

spectre6000
03-10-2013, 09:33 AM
It's personal preference. I like the green plates (they look a million times more appropriate on an older car than the inkjet-looking collector plates), and I keep my cars maintained such that inspections have never been an issue.

Additionally, I've never had a car for 5 years and don't like the idea of paying for things I'm not likely to use. I'd rather have the government inspect a rig I will be using on government-funded roads (taking care of assets on which money has been spent is as or more important than keeping spending in check in the first place) than paying the government extra money for privileges I'm not likely to enjoy.

Uncle Ben
03-10-2013, 09:50 AM
As Rock Rod stated. You need to know what the TBI setup came from. That will be the etest standard you will have to comply with. If you can get a vin # for the donor vehicle you life at the inspection station will get much easier. If you have no way of knowing what donor it can from I suggest going to a salvage yard and getting a vin from a dead GM truck 1993-1995. Those trucks had no smog pumps and not much else either except for a cat and evap canister. You need a vin that is no longer in the e test system. TBI are OBD but they are 1st generation so unlike OBD II that started in 1996 they have very few sensors.

RedCreeper
03-10-2013, 01:39 PM
When i was looking into it i was told i needed to get a piece of paper from an inspection station that approved the vehickle to be tested as what ever the paper said to test at. Up here in weld co. it is still new so everyone is sticking to there guns on this. There are only a few of these approved inspectors around supposedly. I will have to do this for the next project. The guy also said basically what uncle ben said on the years and what has to be on the motor. Those years are best because less equipment on them.

teamextreme
03-10-2013, 03:16 PM
Since I will eventually (in 5 years when I have to renew the collector plates) have to get an emissions test,

You say you're renewing your collector plates, not getting them for the first time right? If so, you don't have to do a test anyway. Problem solved. Collector plates require an e-test when you get them, never again (unless you let them expire).

nuclearlemon
03-10-2013, 05:04 PM
. Collector plates require an e-test when you get them, never again (unless you let them expire).

that was old school collector plates. a few years ago, that changed. now, you do not need an e test at all. walk into dmv, tell them you want collector plates, walk out with the plates. however, you can only get collector plates for 75 and older vehicles now. before it was 25 years old or older.

euroford
03-10-2013, 05:23 PM
^^ thats how it worked for me. i was told i was -only- obligated to have the safety features that came with the vehicle. seat belts, turn signals, etc. my rig doesn't really have any of those things anyways. nobody ever even looked at it. no vin verification required either.

nuclearlemon
03-10-2013, 05:24 PM
I'd rather have the government inspect a rig I will be using on government-funded roads (taking care of assets on which money has been spent is as or more important than keeping spending in check in the first place) than paying the government extra money for privileges I'm not likely to enjoy.

government funded my ass. where do you think the gov't gets their money? we pay for our roads. and if the gov't based your emissions scores on the emissions you put out then fine, but they don't...they require you to have things on your rig because they were on the engine when they were built. they don't care if you pass the sniffer with flying colors...those parts arent there, you fail. to top it off, your car is being tested by some kid who probably doesn't even have a car himself. emissions testing is one big scam. :mad:

euroford
03-10-2013, 06:26 PM
emissions testing is one big scam. :mad:

Yup. NPR recently did a news story covering an audit of the program. basically the conclusion was that we sink hundreds of millions of dollars into the air care program, for what may be at best a 3% improvement that they can't effectively verify.

its a private contractor sucking down our tax dollars for no benefit to the greater public.

FJBRADY
03-10-2013, 06:41 PM
I have a 1970 40 with a 350 out of a 92 Buick. Sniff test was all that was needed and passed 3 years in a row, first two years standard plates and now I have collector plates. I do have the original vin plate on the truck. No cats required in 70, :). I am injected and live in Douglas county.

I would say go for it if your putting a newer motor in your rig, you should not have any issues.

teamextreme
03-11-2013, 11:00 AM
that was old school collector plates. a few years ago, that changed. now, you do not need an e test at all. walk into dmv, tell them you want collector plates, walk out with the plates. however, you can only get collector plates for 75 and older vehicles now. before it was 25 years old or older.

I knew they changed things, especially deleting the rolling 25 year rule (my 76 no longer qualifies, I'm never letting those collector plates expire!) but I didn't realize they no longer require an e-test even for the initial license. Either way, OP shouldn't have any issues regardless of what he does.