Question to the California 335i owners....

clairvoyant · 01-01-2012, 02:17 PM

From what I've seen [and experienced] in the past, the state of California has the most stringent emission control in North America in general.
Those who have the catless downpipes installed and keep the OEM secondary cats, did you pass the emission test there?
Thank You

acdHQK713K · 01-01-2012, 02:20 PM

Quote:

Originally Posted by clairvoyant

From what I've seen [and experienced] in the past, the state of California has the most stringent emission control in North America in general.
Those who have the catless downpipes installed and keep the OEM secondary cats, did you pass the emission test there?
Thank You

Won't pass because they plug into the OBD port while testing and will find a fault code related to removing the the primary cats. If that fault code wasn't there I think you would still have trouble passing.

rooringhusky · 01-01-2012, 02:28 PM

Quote:

Originally Posted by Stangorang

Quote:

Originally Posted by clairvoyant

From what I've seen [and experienced] in the past, the state of California has the most stringent emission control in North America in general.
Those who have the catless downpipes installed and keep the OEM secondary cats, did you pass the emission test there?
Thank You

Won't pass because they plug into the OBD port while testing and will find a fault code related to removing the the primary cats. If that fault code wasn't there I think you would still have trouble passing.

^This..I don't have my catless DPs in yet but yes you will have to remove them before a smog in order to pass..it's not cheap to install/uninstall these badboys everytime so IMO the cost effective option is to find a smog shop that's willing to help you out

805beemer · 01-01-2012, 03:09 PM

I don't mind paying someone to swap the stockers back in ever 2 years.

rooringhusky · 01-01-2012, 03:14 PM

Quote:

Originally Posted by 805beemer

I don't mind paying someone to swap the stockers back in ever 2 years.

Depends on the person...I honestly dont wanna be busting $100-$200 to pay someone to uninstall...then another $100-$200 to re-install the next day...

But I agree with you its not so bad to do it every 2 yrs..

805beemer · 01-01-2012, 03:22 PM

Quote:

Originally Posted by rooringhusky

Depends on the person...I honestly dont wanna be busting $100-$200 to pay someone to uninstall...then another $100-$200 to re-install the next day...

But I agree with you its not so bad to do it every 2 yrs..

Yeah, if it was every year, I would just suck it up and swap them myself, but every two years I get more than $400 of enjoyment out of them so spending the money to swap them out is worth it for me. I do remember the smog tech saying that CA might go to a simple OBD2 scan which I was quite surprised to hear! If that was the case, a BMS DP fix would be all you'd need.

MKR_DmD · 01-01-2012, 08:24 PM

Or just find a shop to pass you with cateless. Money talks for some of these back woods shops.

clairvoyant · 01-02-2012, 08:56 AM

Do those fault codes show up even with "a certain downpipe fix"?
I guess the consensus here is NO to go catless downpipes.
I thought I saw someone here from California who had catless downpipes and passed the e-test.

Quote:

Originally Posted by Stangorang

Won't pass because they plug into the OBD port while testing and will find a fault code related to removing the the primary cats. If that fault code wasn't there I think you would still have trouble passing.

805beemer · 01-02-2012, 02:43 PM

If you have the BMS DP fix, you could pass the OBD test, but if they do a visual inspection and see your missing 2 cats you'll fail. You might be able to pass the sniffer test with just your secondary cats, Ive heard of people running a high blend of e-85 to help them pass before.

Dmacc · 01-02-2012, 02:51 PM

I got state reffed and I had my oem dps in but I had my secondary cats removed and I passed

Pure745 · 01-02-2012, 10:32 PM

how often and when do you have to get smogged? I just got my DP's a few months ago, and there is no way mine would pass based on the smoke alone

805beemer · 01-02-2012, 11:14 PM

Quote:

Originally Posted by Pure745

how often and when do you have to get smogged? I just got my DP's a few months ago, and there is no way mine would pass based on the smoke alone

I think once the car is 5 years old, then every two years.

clairvoyant · 01-02-2012, 11:36 PM

The next question will be:
Do the downpipe cats have the same CEL density as those of the secondary cats?

Quote:

Originally Posted by Dmacc

I got state reffed and I had my oem dps in but I had my secondary cats removed and I passed

Dmacc · 01-02-2012, 11:56 PM

No, I'm almost certain the secondary cats have minimal CEL density compared to the primary cats

etc335i · 01-03-2012, 12:03 AM

Quote:

Originally Posted by DrivinMissDaisy

Or just find a shop to pass you with cateless. Money talks for some of these back woods shops.

this
$100-200

clairvoyant · 01-03-2012, 07:45 AM

I had a not so pleasant experience with the backwood shop.
The next question will be:
Do the OEM secondary cats have the same CEL density as those of the leading high flow catted downpipes such as UR Racing, AR design, etc....?
Thank You

sorryiwasnapping · 01-03-2012, 08:11 AM

Forgive my ignorance on the subject as I'm still in a 328, however is the difference in power between catted and catless DPS really that different? I feel you would be better off getting catted DPs for a few hundred extra, as opposed to having to uninstall/reinstall every 2 years, after doing that a few times the money seems to outweigh the HP added.

I know NJ is a bit luckier as they do OBD scans.

clairvoyant · 01-03-2012, 08:48 AM

I went down the high flow catted dowpipe path before.
After a 2 year usage, the cats started to "dislocate" and made rattle noises that amplified the wastegate rattles.
Yes, I passed the emission test with the high flow catted downpipes and NO secondary cats. That is why I reiterate the question:
Do the OEM secondary cats have the same CEL density as those of the leading high flow catted downpipes such as UR Racing, AR design, etc....?
Thank You

Quote:

Originally Posted by sorryiwasnapping

Forgive my ignorance on the subject as I'm still in a 328, however is the difference in power between catted and catless DPS really that different? I feel you would be better off getting catted DPs for a few hundred extra, as opposed to having to uninstall/reinstall every 2 years, after doing that a few times the money seems to outweigh the HP added.

I know NJ is a bit luckier as they do OBD scans.

MKR_DmD · 01-03-2012, 11:41 AM

You have to smog 6 years after manufacter year and then every 2 years.

If someone can post pics of the 2nd cats, you can ball park it by the looks. I would guess they are the same density. OEM only cares about blowing clean air, not horsepower.

805beemer · 01-03-2012, 02:45 PM

the cats from an aftermarket DP are HFC's and are shorter than the stock secondaries. So I would venture to guess that the stock secondaries would more dense than the catted aftermarket dp.

clairvoyant · 01-03-2012, 03:03 PM

Any substantiated scientific evidence on all these hypotheses???

01-01-2012, 02:17 PM	#1
clairvoyant Major 79 Rep 1,032 Posts Drives: Bavarian Manure Wagon (BMW) Join Date: Oct 2007 Location: 45°19′20″N, 75°50′0″W iTrader: (5) Garage List 2007 335i [5.24]	Question to the California 335i owners.... From what I've seen [and experienced] in the past, the state of California has the most stringent emission control in North America in general. Those who have the catless downpipes installed and keep the OEM secondary cats, did you pass the emission test there? Thank You
	Appreciate 0 Tweet Quote

01-01-2012, 03:09 PM	#4
805beemer Captain 23 Rep 647 Posts Drives: 2008 135i Join Date: Jul 2011 Location: Lompoc, CA iTrader: (4)	I don't mind paying someone to swap the stockers back in ever 2 years.
	Appreciate 0 Quote

01-01-2012, 08:24 PM	#7
MKR_DmD Lieutenant 6 Rep 494 Posts Drives: 16 Jeep Cherokee Join Date: May 2010 Location: Germany iTrader: (3)	Or just find a shop to pass you with cateless. Money talks for some of these back woods shops.
	Appreciate 0 Quote

01-02-2012, 02:43 PM	#9
805beemer Captain 23 Rep 647 Posts Drives: 2008 135i Join Date: Jul 2011 Location: Lompoc, CA iTrader: (4)	If you have the BMS DP fix, you could pass the OBD test, but if they do a visual inspection and see your missing 2 cats you'll fail. You might be able to pass the sniffer test with just your secondary cats, Ive heard of people running a high blend of e-85 to help them pass before.
	Appreciate 0 Quote

01-02-2012, 02:51 PM	#10
Dmacc Colonel 200 Rep 2,799 Posts Drives: 2011 BMW 1M Join Date: Mar 2010 Location: So Cal iTrader: (1)	I got state reffed and I had my oem dps in but I had my secondary cats removed and I passed __________________ thanks to MGallop
	Appreciate 0 Quote

01-02-2012, 10:32 PM	#11
Pure745 Private First Class 11 Rep 124 Posts Drives: 335i Coupe/745i Join Date: Apr 2010 Location: Los Angeles, CA iTrader: (0)	how often and when do you have to get smogged? I just got my DP's a few months ago, and there is no way mine would pass based on the smoke alone __________________ 335i Coupe\|BSM/Red Coral\|BBS LM-R DBK\|H&R Coilovers\|OEM M3 Lip Spoiler\|Many more pending..
	Appreciate 0 Quote

01-02-2012, 11:56 PM	#14
Dmacc Colonel 200 Rep 2,799 Posts Drives: 2011 BMW 1M Join Date: Mar 2010 Location: So Cal iTrader: (1)	No, I'm almost certain the secondary cats have minimal CEL density compared to the primary cats __________________ thanks to MGallop
	Appreciate 0 Quote

01-03-2012, 07:45 AM	#16
clairvoyant Major 79 Rep 1,032 Posts Drives: Bavarian Manure Wagon (BMW) Join Date: Oct 2007 Location: 45°19′20″N, 75°50′0″W iTrader: (5) Garage List 2007 335i [5.24]	I had a not so pleasant experience with the backwood shop. The next question will be: Do the OEM secondary cats have the same CEL density as those of the leading high flow catted downpipes such as UR Racing, AR design, etc....? Thank You
	Appreciate 0 Quote

01-03-2012, 08:11 AM	#17
sorryiwasnapping Private First Class 1 Rep 137 Posts Drives: '12 VW GTI Join Date: Feb 2011 Location: New Jersey iTrader: (0)	Forgive my ignorance on the subject as I'm still in a 328, however is the difference in power between catted and catless DPS really that different? I feel you would be better off getting catted DPs for a few hundred extra, as opposed to having to uninstall/reinstall every 2 years, after doing that a few times the money seems to outweigh the HP added. I know NJ is a bit luckier as they do OBD scans.
	Appreciate 0 Quote

01-03-2012, 11:41 AM	#19
MKR_DmD Lieutenant 6 Rep 494 Posts Drives: 16 Jeep Cherokee Join Date: May 2010 Location: Germany iTrader: (3)	You have to smog 6 years after manufacter year and then every 2 years. If someone can post pics of the 2nd cats, you can ball park it by the looks. I would guess they are the same density. OEM only cares about blowing clean air, not horsepower.
	Appreciate 0 Quote

01-03-2012, 02:45 PM	#20
805beemer Captain 23 Rep 647 Posts Drives: 2008 135i Join Date: Jul 2011 Location: Lompoc, CA iTrader: (4)	the cats from an aftermarket DP are HFC's and are shorter than the stock secondaries. So I would venture to guess that the stock secondaries would more dense than the catted aftermarket dp.
	Appreciate 0 Quote

01-03-2012, 03:03 PM	#21
clairvoyant Major 79 Rep 1,032 Posts Drives: Bavarian Manure Wagon (BMW) Join Date: Oct 2007 Location: 45°19′20″N, 75°50′0″W iTrader: (5) Garage List 2007 335i [5.24]	Any substantiated scientific evidence on all these hypotheses???
	Appreciate 0 Quote