Ditching the cat

[Sweep]

The cat needs to go! What's the best way to go about it? Cut it out and weld a piece in or flange it? I'm on a Jetex cat back anyway so will it make it much louder?

Ben.

[Doingitsideways]

Better to flange it if you can.
That way, if you decided to return the car to road condition, you could stick a cat on it quickly and easily.

As for making it louder, it will a little, mainly because of the lack of restriction.

[Sweep]

Righto mate I think that's the way to go.

I'm hoping it'll free up some more ponies too!

[Santa]

Just a note, this is all obviously for non-road use.

[Doingitsideways]

Of course :)

[Sweep]

Of course, I would never condone the use of such things on our country's roads.

[Mr Sheen]

Mine got noisier inside around the 50-55 mph, after ditching the cat.

[xllifts850]

How do you get around the lambda issue? Have often thought about decatting but been put off by the lambda and emissions.

[ExternalError]

by either putting a right angles spacer on the lamda sensor or mapping out the rear lamda sensor

[Sweep]

How do you get around the lambda issue? Have often thought about decatting but been put off by the lambda and emissions.


Hadn't thought about that, what will be the consequences of that?

[t5 pete]

With you having a 850 it sits pre cat so it won't be affected

[xllifts850]

With you having a 850 it sits pre cat so it won't be affected
Am I being dumb (probably lol) but my 850T5 has lambda at front and has cat, How does that work on my one, reason I ask is my lambda light is on at present and may as well decat when trying to reset fault.

[weagie]

As far as I've been led to believe if a car is fitted with a cat from the factory then it must have one at the point of the MOT test or it's an instant fail. It's one of the reasons mine failed lol

[jamesy12345]

A 100 cell/race cat would still get you through the MOT including emissions assuming the car is in good nick, without losing too much power

Emissions limits just for interest (out of date but still correct numbers I think):

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/346222/emissions_17th_edition.pdf

[Jamest5r]

Am I being dumb (probably lol) but my 850T5 has lambda at front and has cat, How does that work on my one, reason I ask is my lambda light is on at present and may as well decat when trying to reset fault.

Your lambda light being on probably has nothing to do with your cat 99% percent of the time, it could be as simple as a minor air leak somewhere, get the codes read if you can, also if your going for a decat and your cat is fine make sure they flange the pipe in and not permently weld it that way you can replace it for the mot.

[weagie]

My lambda light is on because I disconnected the idle control valve