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      04-12-2014, 11:56 AM   #1
gazosnic
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Test Pipe (Current Non tune solutions to pass emissions?) e,g, 02 extenders etc?

Looking at going that test pipe route to remove primary cats. Seems most get a tune, but wanted to know if anyone has been successful instead using o2 extenders or other tricks to maintain ready status to allow for passing OBDII emissions check.

If you found a setup that works... please post what you are using.
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      04-12-2014, 01:46 PM   #2
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Hey man, how do you like your test pipes? I am considering it. how did the sound change, do you feel performance difference?
Thanks
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      04-12-2014, 01:52 PM   #3
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Hey man, how do you like your test pipes? I am considering it. how did the sound change, do you feel performance difference?
Thanks
havent got them yet... just doing research myself before diving in. My main concern is my question above regarding possibilities to pass emissions (ideally w/o engine tune)
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      04-12-2014, 01:53 PM   #4
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If you have test pipes, extenders are not going to do the trick. Some times people *barely* squeeze by with extenders and HFC's (200cel).

As the cats age, the car will be more likely to trigger the fault even w/ extenders that may have previously worked.

Some of the very good HJS cats almost pass, but Catless is a different ballgame.
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      04-12-2014, 02:13 PM   #5
besiktas
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I have FL registration so i dont worry about emissions
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      04-14-2014, 10:42 AM   #6
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My extenders work just fine. Over 500 miles do far and no issues
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      04-14-2014, 10:43 AM   #7
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Here you go>> Extenders, mini cats... Everything you need to get it to work.


http://www.o2spacer.com/
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      04-14-2014, 11:22 AM   #8
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I wonder how those mini cats work? SuperSprint has some but charges $$$$.
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      04-14-2014, 11:24 AM   #9
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I wonder how those mini cats work? SuperSprint has some but charges $$$$.
yes, these are much cheaper. People have great results w/ them. I will be buying a set. I also had no problems running extenders
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      04-14-2014, 11:51 AM   #10
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The mini cats don't work according to IND but if you get them to work lmk know as well and I'll order some too
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      04-14-2014, 11:54 AM   #11
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Think the key is running a 90 deg extender towards the front of the motor as it's against the exhaust flow already and really pulled out of the stream. that + the mini cat should work pretty well. We'll see
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      04-14-2014, 11:57 AM   #12
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Quote:
Originally Posted by besiktas View Post
Hey man, how do you like your test pipes? I am considering it. how did the sound change, do you feel performance difference?
Thanks
Quote:
Originally Posted by besiktas View Post
I have FL registration so i dont worry about emissions

What are you doing?
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      04-14-2014, 11:59 AM   #13
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OP - Just spring for a tune. More power, improved efficiency, 100% CEL-less operation. The results are in amigo. What's left to ponder?
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      04-14-2014, 12:10 PM   #14
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Originally Posted by s85e90 View Post
Here you go>> Extenders, mini cats... Everything you need to get it to work.


http://www.o2spacer.com/

Would you happen to have a picture of this setup by chance? So if i follow I would buy two mini cats + right angle adapters to place on the rear set of bungs? Transfer over the pre cat sensors as normal.
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      04-14-2014, 12:14 PM   #15
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Would you happen to have a picture of this setup by chance? So if i follow I would buy two mini cats + right angle adapters to place on the rear set of bungs? Transfer over the pre cat sensors as normal.

Yes. Look at the pics in this other user's thread with Fabspeed O2 extenders.

http://www.m3post.com/forums/showthread.php?t=964661


I am doing something similar to this. I would buy the one piece angled bend but it doesn't look like enough room to install w/out dropping the exhaust a little bit, and TBH I'm really tired of taking my car apart. I am going to run the 90 deg angle to the min cat and have it look just like that pic I posted above (towards the motor)
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      04-14-2014, 12:17 PM   #16
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The extenders don't work. They definitely work for awhile, but you won't pass the OBD-II readiness checks with them there, and you will throw a CEL eventually. Sometimes it takes 20 miles, sometimes it takes a few hundred if you only do short trips. I tried them and gave up, and bought a tune.
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      04-14-2014, 12:22 PM   #17
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The extenders don't work. They definitely work for awhile, but you won't pass the OBD-II readiness checks with them there, and you will throw a CEL eventually. Sometimes it takes 20 miles, sometimes it takes a few hundred if you only do short trips. I tried them and gave up, and bought a tune.
Will it not make a difference with those mini cats mentioned as well?
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      04-14-2014, 12:27 PM   #18
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Yeah, if this is for inspection purposes I don't know. I'm talking about just keeping the CEL off. I don't live in a state that does annual inspections.
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      04-14-2014, 12:28 PM   #19
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Yeah, if this is for inspection purposes I don't know. I'm talking about just keeping the CEL off. I don't live in a state that does annual inspections.
I am in IL. We dont have physical inspection... just OBDII test. So in theory if this setup works and CEL stays off - wont that mean readiness will still in in tact?
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      04-14-2014, 02:43 PM   #20
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Quote:
Originally Posted by gazosnic
Quote:
Originally Posted by s85e90 View Post
Yeah, if this is for inspection purposes I don't know. I'm talking about just keeping the CEL off. I don't live in a state that does annual inspections.
I am in IL. We dont have physical inspection... just OBDII test. So in theory if this setup works and CEL stays off - wont that mean readiness will still in in tact?
No, the cel being off doesn't necessarily mean readiness is in-tact.
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      04-14-2014, 05:40 PM   #21
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Quote:
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No, the cel being off doesn't necessarily mean readiness is in-tact.
Right.


Quote:
Originally Posted by gazosnic View Post
I am in IL. We dont have physical inspection... just OBDII test. So in theory if this setup works and CEL stays off - wont that mean readiness will still in in tact?
What many guys posting in here don't realize is that we live in areas that for annual emissions inspection the car gets connected to a computer via the OBD port. If one simply "tunes" the car to remove the CEL/SES light, then the sensor is sitting in "Not Ready" status. More than 1 emissions sensor in "Not Ready" status is an automatic fail.

I've ran o2 simulators on my catless e46 m3 prior and never had an issue. The person I bought my last ones from has a new design out now. Unfortunately he is claiming 1 sim per sensor which just makes de-catting the car expensive.

http://www.o2simulator.com/smart-o2-...tor-p-185.html
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      04-14-2014, 06:17 PM   #22
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I thought most tuned kept emissions readiness intact?
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