Universal cats

[audis293]

My 93 Coupe didnt pass the emission test which was no surprise since it didn have any cats.
Went to my local Audi dealer to check prices for new ones....7000 NOK a piece.There was no way I was gonna pay 14000 NOK (1300 pounds) for 2 cats.
I thought I was gonna be smart and rebuilt the exhaust system from dual pipes to a single 2.5" from downpipe to connection point on rear muffler.
I installed a universal 2.5" cat and wnt for a new emission test...all ok.
Went for work and came back 5 weeks later from India and my wife had been driving the car in the mean time.Here only complaint was some ratteling noises.Girls girls girls....
I tried the car and it only boosted 0.5 bar and had a lot off strange noises.
The inside of the cat had come loose and was restricting exhaust to pass causing litle boost and a lot of strain on the turbo I guess.
I was driving the car one day and heard a big bang and a lot of smoke came out the tailpipe and voila .... it boosts 1.4 bar again.
This is only a warning to those,if any, who concider the cheap solution when bying cats...dont do it!!!I was lucky to not destroy the turbo I think.

I have now only a pipe where the cat was and will buy a real cat at next emission test.
Ohh, by the way, the uni cat was american

audis293

[Pisobiker]

Well, what I can say is I would never replace a stock cat with another ceramic one. And only of a "sport" type with no more than 200 cells per square inch. Price will be only a little higher than a cheap "universal" one but will last 10 times more and give sensible performance increases.

Apart form my symphaty for "merricans" and US, I know for sure there are a lot of really excellent prodacts they make, so I guess you had bad luck or maybe didn't pay too much attention to the fact an S2 deserves much better than an economical "universal" replacement part, whatever it is....


Ciao

Marco

[Sweeper]

Don't get me wrong but girls usually can catch a lying cop or a bump and destroy a catalyst just like that.

So maybe it wasn't cat.

[Stick Insect]

I went through a deep puddle and killed the cat on my Mondeo. Better than killing badgers I s'pose.....

Deep snow and lying water can fracture the ceramic on cats.

I hate to ask audis293, was the cat fitted the right way round? is there a right way round for that cat?

The cat debris blew up the exhaust and was only cleared when I replaced the exhaust. Max speed was 18 MPH

Sweeper, you don't have lying cops in Lithuania do you?

David.

[Sweeper]

There are also a possibility to distroy a cat using bad petrol. They just blow.


David: Well it's Latvia not Lithuania , but no I do have them in a some living areas. In fact they are very high and if the car is lowered you will scratch your bottom even moving slowly.

[Stick Insect]

Sweeper, my mistake. Latvia has more reindeer.

I now know what you mean

your lying cop is what we call a sleeping policeman ( speed hump)

Our lying cop is a policeman who does not tell the truth.

David

[Pisobiker]

Originally posted by Stick Insect


Our lying cop is a policeman who does not tell the truth.

David

Guys, all this humorous language disclaiming is really funny.....
I hope our moderators won't argue we always end up going out of topic....



Marco

[Stick Insect]

Was there a topic

As long as it's good clean fun I don't think they mind

D.

[Sweeper]

Marco: Strange but I use word translator(a very good one) quite often , writing here , and it translated the sentence right.

Anyway , catalyst converters !

[audis293]

He he a lot of comedians on this forum, but thats good.We need some humor from time to time.
To answer some of the above questions....yes the cat was the right way and yes I have only used good fuel....and yes I was stupid to buy the cheap one instead of invest in a proper one.

audis293