e30 m50 swap - emmissions testing

[g22]

I'm curious if everyone passes the emmissions testing where they are? I'm in Atlanta and will have to pass the "sniff" test. Has anyone had problems? Is the e30 charcol canister part of the emissions system, does it need to be hooked up in the swap. I also will be running a cat, most likely a magnaflow or similar.

[russiane30]

I'm curious if everyone passes the emmissions testing where they are? I'm in Atlanta and will have to pass the "sniff" test. Has anyone had problems? Is the e30 charcol canister part of the emissions system, does it need to be hooked up in the swap. I also will be running a cat, most likely a magnaflow or similar.

well i just tested mine and the guy said he works at the station for 5 years and he never seen nothing like that. only thing i passed is fuel cap test

[matt]

90% of passing emissions comes down to these things:

1) Quality catalyst, at operating temperature.
2) Quality tune that's set for the modifications done to the motor
3) Working O2 sensor connected to the ECU

Now, I have done this enough to know a few more things...

Aftermarket cats are terrible quality. Stick with BMW OEM if you need to pass emissions.

O2 sensor is CRITICAL if you want to pass emissions.

And the most important thing is to drive the freaking piss out of the car before you get it tested. Heat up your catalyst and it will work much better.

Matt

[matt]

You do not have to have the charcoal canister hooked up BTW.

[g22]

I had the same problem recently with the m20. I was told the cat was bad. I was hoping that the m50 would pass with no problem. What are you going to do? Do you think it's engine related specifically?

[g22]

Matt were you at road a this weekend? I was the guy giving Harrison a hard time.

[e30s52]

I am going to try again without my 24 pound injectors and euro maf. I failed really bad with them.

[matt]

LOL, you'll have to be more specific.

Yes, I was B28. Codriving the red e36 325 with Michael McCoy from TRM.

[Jean]

You do not have to have the charcoal canister hooked up BTW.

It really depends on your smog laws. Here in CA everything has to be hooked up. Universal cats are no longer even legal. Well, those cheap $70 cats aren't, but the $300+ magnaflow cats are...

And I agree on driving the crap out of the car before smog, to heat up the cat.

[matt]

I am going to try again without my 24 pound injectors and euro maf. I failed really bad with them.

Did you email me about this? If so I replied today. Sorry, I was at the track all weekend.

There is no reason you can't pass emissions with the mods you want on your car, you just need to have it running well, have a good cat, and have a tune for the mods.

[matt]

It really depends on your smog laws. Here in CA everything has to be hooked up. Universal cats are no longer even legal. Well, those cheap $70 cats aren't, but the $300+ magnaflow cats are...

And I agree on driving the crap out of the car before smog, to heat up the cat.

I was being specific as the first three posters in the thread are all in the Atlanta area. I freely admit that I don't have the first clue what is required in other areas including CA, but I believe the actual values for emissions are federally mandated, so if it passes a sniffer in GA it will pass in CA also.

[e30s52]

Did you email me about this? If so I replied today. Sorry, I was at the track all weekend.

There is no reason you can't pass emissions with the mods you want on your car, you just need to have it running well, have a good cat, and have a tune for the mods.

Nope I didnt. The tune I have is from you. Its for 24 pound injectors and euro maf. I think though I didnt drive it long enough and I have a crappy cat. I am going fi so I have a 3in cat but after that 2.25's into a remus muffler. So should I get a mid section of an e36 m3 and reweld it in?

[matt]

Can you post your results?

[e30s52]

HC limit is 150 mine was 320
CO limit is 1 mine was 9.7
CO=CO2 limit is 6 mine was 18.3

[Dominic49]

justins e30m50 passed with flying colors with just a universal 2.5inch cat