To De-cat or not to De-cat that is the..

17th November 2005, 01:58

... question?

do i or dont i?

i have a de-cat pipe on my future piper full system,

is it worth the hassel, do u notice is difference in noise, performance?

cheers

17th November 2005, 03:18

Yeah you should leave it on, I have ordered a De-Cat pipe of ebay to put on to my car

17th November 2005, 14:07

definatly keep the de-cat i noticed a lot of difference with mine. there is a lot less engine braking, a more crisp note sounds awsome at about 5200 revs onwards make you shiver man and also it puts about 4-5 bhp on your car well on a mk1 anyway not to sure about mk2. as they have a different kind of exhaust system which is the main reason for the difference in bhp between the two models

17th November 2005, 15:41

Quote:

Originally Posted by SPENCER6

not to sure about mk2. as they have a different kind of exhaust system which is the main reason for the difference in bhp between the two models

not strictly true but never mind

you'll be lucky to see 2-3bhp from a de-cat, most noticeable things will be a very slight increase in responsiveness and a slight change in exhaust note. it's a bit of a pain in the arse changing it every MOT time but if you don't mind that then go for it.

17th November 2005, 15:51

it made mina a bit louder and a bit more responsive and pulled a bit better but my cat was part of the manifold so the manifold might make it pull better

17th November 2005, 16:00

[/QUOTE]
not strictly true but never mind

you'll be lucky to see 2-3bhp from a de-cat, most noticeable things will be a very slight increase in responsiveness and a slight change in exhaust note. it's a bit of a pain in the arse changing it every MOT time but if you don't mind that then go for it.[/QUOTE]

It was citroen that told me this!
they said that the difference is mainly in the exhaust system and construction of the cats on the newer models that made less pollution and better flow also the positioning of the cat being on the manifold changed the vibrations sent back and forth through the pipes creating again a better flow.
in theory this should mean that an identical full straight through system on both models with both having say a 4-2-1 manifold would even out the power!

17th November 2005, 17:30

not yet got round to the MOT but its onlt a jack up and 4 bolts. 2 on the manifold and 2 on the centre section!

17th November 2005, 23:46

if you can be bothered to change it everytime for an mot and your after a few bhp if your lucky,slight increase in loudness and responsive then go for it.however if your really unlucky you may get pulled over for an emissions test and then your fucked 2bh.however i dont know anyone who has been pulled over for one

21st November 2005, 20:01

been looking for a full system for my 1.1 hopefully push my car a bit further make it sound great and get rid of my std and exhaust tip .... plus i dont want just a back-box.... how much do you think it would cost for a full s/s system on a 1.1 ?

21st November 2005, 20:14

any1 know the best site or shop to get a decent manifold or de-cat pipe from

21st November 2005, 21:12

theres usually a few on ebay.
you can pick up a deacent brand new 4-2-1 manifold for about 150 including p&p
milltek manifolds are a very good manifold to get but the sportex manifolds have the same configuration and i think would be equally as good

22nd November 2005, 01:39

keep the de-cat mate dont be shy....
like people have said if it to noisy or you dont like or it doesnt make any difference just cange it.

22nd November 2005, 01:40

well the de-cat is on and a love it

22nd November 2005, 03:42

good lad.haha

22nd November 2005, 03:58

Quote:

Originally Posted by SC_03_TTY

any1 know the best site or shop to get a decent manifold or de-cat pipe from

If your going to get a manifold you might as well get a decent one have a look here. They come highly reccommended from gmc. If not one of those try a supersprint one.