To cat or not to cat???

[rotoryboy]

Mines an ABY with a 3" single box de-catted system by Longlife Leeds, sounds fantastic.

You need a CAT to pass the emissions test from post-92 I think?

Another reason why the 91 3B is superior

With a de-cat and a decent full exhaust, you certainly get a bit more noise, you definitely get more of a "whooshing angry hissing" on full boost, which is nice, and you get a lot more popping and burbling on the overrun, which is lovely. Quite often you get flames

[gavs20v]

very nice mate, thats looks spot on

[s2driveruk]

@rotoryboy..does it pass an MOT though?

[rotoryboy]

@rotoryboy..does it pass an MOT though?

It passes with my MOT station, thats all I care about

[Jamo]

Well that goes against all the info I've found so far ....... I reckon it's just you ABYers getting jealous of our superior firepower and propogating urban myths to make yourselves feel better!

I've never met a bigger turn coat in my life, it's like a Liverpool supporter turning into a Man Utd fan!

[rotoryboy]

I've never met a bigger turn coat in my life, it's like a Liverpool supporter turning into a Man Utd fan!

[Fat Audi 80]

Just to clarify again, ( I had to go through this in detail at the last MOT) you do not need a CAT after 1992 but do need one after 1994, But if you don't have a CAT after 1992 then you need to pass the emissions test. An S2 will not even come close to passing the emissions test WITHOUT cats. My MOT station did eveything they could to pass mine without cats and it failed by miles.

HTH

Cheers,

Steve.

[raymor]

If your S2 must have one, I'd get a sportsCAT - 100/200CSI, which will allow free flow but remain within the law if you get pulled. It also saves all the messing about at MOT time.

I reckon the difference between sports CAT and no CAT in real driving terms won't be significant enough to justify the messing around and also if you've had your car remapped without a CAT and then you change the spec and add one... I guess that may give problems.

... also dare I suggest it, it isn't my world and yes I like fast cars... but I'm only here for a short while and the kids will be here long after me

[dan_b]

Just to clarify again, ( I had to go through this in detail at the last MOT) you do not need a CAT after 1992 but do need one after 1994, But if you don't have a CAT after 1992 then you need to pass the emissions test. An S2 will not even come close to passing the emissions test WITHOUT cats. My MOT station did eveything they could to pass mine without cats and it failed by miles.

HTH
Cheers,
Steve.

So in essence, although you don't need a CAT to pass the MOT post 1992, you need a CAT to pass the MOT because without it it won't pass?

[Jamo]

So in essence, although you don't need a CAT to pass the MOT post 1992, you need a CAT to pass the MOT because without it it won't pass?

Nearly, after 1994 you need a cat
1992 - 1994 - Don't need a cat only need to pass the emissions test.
pre august 1992 do what you like.

But the S2 wont pass an emissions test without a cat, Mihnea has tried to map a car to this affect and said it was impossible.

If he says that, then it's good enough for me.

Sports cat are the way to go, anyway i'm not a fan of de-catting, those who do it don't really care about the future generation for the sake of 5bhp.

[dan_b]

That's what I'm saying - although you don't need a cat to pass the MOT 1992-1994, without one you'll fail because the S2 can't manage the emissions test, so you need one!

91 3B rulez

[rotoryboy]

those who do it don't really care about the future generation for the sake of 5bhp.

Trucks, buses and aircraft are far higher up the polution list that a couple of cars . Diesel fumes (inc. public transport) have been proven to cause asthema in children but I don't see the goverment doing anything about this. Aviation pumps thousands of tons of polutants into the air on a daily basis so in the grand scheme of things de-catting car is not going to cause the death of the planet