Re: Is a bigger exhaust better?

[John Graham <jgraham1@erols.com>]

Gerard wrote:

> Hi!
>
> I need to replace my back box on my 1990 Audi 200T. I got screwed
> when I bought the car 3 months ago in that the back box had a hole
> in it and the salesperson put a cheap rear silencer on. Now the
> thing is developing a hole at the welding  point. This comes from
> the rear box being a 45mm or 50mm while the entire exhaust system
> is in fact a 57mm system. I will have to replace the thing as the
> car does have an annoying beat to its exhaust note. So if I'm
> going to have the job done I was just wandering if it would be better
> to go on to a 67mm system or keep with the 57mm piping system.
>
> I have heard that it is not always an advantage to fit a larger bore
> exhaust system. What is opinion and experience of fitting a larger
> bore exhaust system? Obviously it will be louder, but what about
> performance?
>
> Another thing is these "performance back boxes". These have large
> diameter pipes surrounded by what look like very small absorption
> type mufflers, usually about 2 to 5 centimetres larger in diameter
> compared to the pipe (a very small silencer, indeed). What are the
> advantages of fitted these apart from a throatier/louder exhaust
> note?
>
> What are "resonator type tailpipes"?
>
> G.
> --
> "a thousand miles from here, there is another person smiling"
> name   : gerard van vught
> tel    : +27-57-912 2658 (w) / 082 923 9609 (cell)
> url    : http://www.acenet.co.za/homepages/gerard/
> e-mail : gerard@poboxes.com  / han.solo@galaxycorp.com
>          gerard@acenet.co.za / van_vught@frg.issi.co.za


Think of it as tuneing. The mufler and pipes must work as a system. You
can't just slap on
big pips with a mufler thats not tuned for it. And if theres a cat. in
the pipe for get it.
Go for an OEM part or replace the whole system.

John
1990 CQ