100/200 cells Sport catalysts - good or not?

[944 turbo cabrio]

Anyone here having done the switch to Sports catalysts??
Have you seen a difference or is the gain so little that its not worth doing / nd is it cleaning well enough?

Cheers
Niels

 

[os951]

Have done it several times. Huge difference. Over 20 years old original cats are always worn out or more or less blocked.

 

[944Turbo]

Most people just remove them, not required in the UK for MOT so why go to expense of a replacement.

 

[os951]

Why not save the world.....[]

 

[944Turbo]

By raping it of precious metals to make the cat or by chucking more CO2 into the atmosphere once you have fitted it? (ok less co and other nasties)
Tony

 

[J4CKO]

I read that removing the cat can make the car sound odd, does anyone do a decat pipe for the S2 ?.

I decatted an Audi 100 (5 cyl) in the nineties (1990 car) and it went from meek and mild to sounding fairly quattro-esque, gained a good dose of power according to my arse dyno.

 

[os951]

Of course it sounds odd if there is not any resonator left. If car did not had a cat from the factory, it was equipped with resonator style silencer.

 

[TTM]

Niels, what's the rule like in DK?

 

[Diver944]

ORIGINAL: J4CKO

I read that removing the cat can make the car sound odd, does anyone do a decat pipe for the S2 ?.

Most of us just replaced the cat with a straight through stainless pipe for less than £100 fitted. Yes it makes it louder but not uncomfortably so, especially if you have a standard rear box. I personally cannot detect any extra power decatting an S2

It's much more noticeable in a Turbo [8D]

 

[944 turbo cabrio]

Rules in Denmark are that the car needs to clear original emssions with in a fixed percentage (don't quite remember by how much).
It is however not always measured although it should be.....

I am more the feeling that I happily sacrifice 5-10 BHP for the sake of a good feeling and not risking to be detected.

@ Olli: What cat have you bought and where? I need a 3" metallic cat and have found some universal fit by some Swedish companies.

Cheers

Niels

 

[os951]

Niels,

i have had good experience with Swedish made Ferrita cats. Should be available in Denmark. I suppose you can get one easily from Sweden as well.

 

[944 turbo cabrio]

Thanks Olli