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 Posted: Tue Sep 24, 2013 10:51 am |
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Joined: Jul 10, 2013
Posts: 131
Trade Rating: 0
Location: Daventry
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Just looking on service box (saves a trip under the car) and found this:
Picture Link
Basically I want to empty my cat box out for tuning/ecu mapping purposes. It looks like the cat section is sold with a huge long pipe on one end and a flexy (delicate) on the other.
But by looking at the picture it looks like I can cut the long pipe off and use an "exhaust sleeve" to re-attach it.
Does anyone have any experience with this??
Any help as always would be appreciated 
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Last edited by rlees85 on Tue Sep 24, 2013 1:38 pm; edited 1 time in total
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Posted: Tue Sep 24, 2013 12:52 pm |
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Joined: Feb 10, 2010
Posts: 4266
Trade Rating: +4
Location: Palestine
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well I wouldn't recommend that you empty your CAT,as this will make a noise while driving,which make driving not fun.
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Posted: Tue Sep 24, 2013 1:51 pm |
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Joined: Jul 10, 2013
Posts: 131
Trade Rating: 0
Location: Daventry
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Glad you mentioned that... I assumed it wouldn't as the 306 never did but I guess its a different exhaust! Probably have to give that a miss then, cheers
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Posted: Wed Sep 25, 2013 4:19 am |
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Joined: Jun 19, 2010
Posts: 1600
Trade Rating: +4
Location: South Bucks
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If my 1.4 hdi is anything to go by, it doesn't make that much noise as I removed the innards of my cat when it collapsed recently. BUT .. new MOT rules state that if the car had a cat, it must still be fitted.
So one option is to have two pipes: one with, one without, and swap them before and after MOT tests. But if you have any lambda sensors, that may trigger a fault and the engine management light. And that in itself is a fail.
Diesels don't yet have emissions tests that would show up a missing cat ... they just have a smoke test. So the chances of finding out are slim, until they move the goalposts again.
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| Down to just the 1.4 HDi. Cayman Green 2.0i CC sold. | |
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Posted: Sun Oct 20, 2013 6:48 am |
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Joined: Jul 10, 2013
Posts: 131
Trade Rating: 0
Location: Daventry
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Right sorry to raise this from the dead.....
Firstly, thanks Timon for your advice, much appreciated. But I am going to run the risk... The rest of the exhaust is standard and will be retaining the standard rear silencer. This should keep noise within reasonable levels, I hope, and also not knacker the turbo (in-case that rumor is true about no back-pressure).
But I am going to give this a go anyway...
Please do not comment about noise, MOT failures, little gains, etc. I am aware of everything and the main point of this is for my chip tuning experiments I want the red hot gasses around the turbo moving away quicker.
Now ideally has anyone found a way to gut the standard cat? it looks impossible to me as it has the flexi of one side and a decent length of pipe of the other. I would really appreciate to hear from anyone who has managed to do this and how.. !
Second option, I tried to find a straight pipe (and do the swap each MOT time) but again it seems easier to find pixie dust than 206 2.0 hdi de-cats! If anyone knows how to source one again would be appreciated...
Thanks again
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Posted: Wed Oct 23, 2013 6:52 pm |
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Joined: Sep 22, 2013
Posts: 107
Trade Rating: 0
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If its the same as a 1.4 hdi then its a very easy, just unbolt cat from centre section and from manifold, after removing heat shield. then use a large old screwdriver and a hammer to destroy internals, there's no noise coming from mine, all that happens is less carbon seems to build up now and its a little more responsive, no ecu lights have come up on mine. its a 53 plate facelift.
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Posted: Fri Oct 25, 2013 9:08 am |
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Joined: Jul 10, 2013
Posts: 131
Trade Rating: 0
Location: Daventry
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Thanks for reply... I think the 2.0 HDI is different as the CAT has decent lengths of pipe coming off both sides... I just wondered if anyone had successfully managed this on a 2.0 HDI despite this and how... (as knowing will speed my job up a lot if I haven't got to spend ages figuring out how haha)
Thanks anyway
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