The center (as opposed to centre) muffler does most of the work in
making an Alfa quiet. I once ran a welding rod through the center muffler and
it is definitely a straight through design.
A proper sounding Alfa exhaust needs a resonator or catalyst at the
front. It needs a center muffler. The rear can be a straight pipe and still
be quiet.
The worst sounding exhaust I ever built was a straight pipe back to a 2
1/2 inch "Turbo" style muffler on the rear. It was extremely raspy and not at
all pleasant. That is why you need a resonator in front.
Since you are in Yurope somewhere, I bet your stock cast iron headers are
the split style with one runner in front of the cross member and one behind.
Those are much better than the stock 4 into 1 manifold we got in the USA.
Run the stock front head pipe with the resonator. Buy an Ansa center
section and run a straight pipe at the rear. If that is too noisy, put on an
Ansa rear section.
I know Ansa systems do not last as long as stainless steel, but they are
affordable.
My wife's 91 spider with the stock catalyst, the stock center muffler and
a straight pipe at the rear was very quiet. The rear straight pipe gave it a
bit of a proper Alfa exhaust note.
When the center muffler stress cracked, I replaced it with a Cherry Bomb
glass pack. It is now very loud, but still has a nice tone. I have a brand
new Ansa rear section with the single tip that looks best on the 91 spiders.
But my wife likes her spider loud, so it remains that way.
Ciao,
Russ Neely
Snowed in in Oklahoma City
--- On Sat, 12/26/09, Tiberio Nick <[email protected]> wrote:
From: Tiberio Nick <[email protected]>
Subject: [alfa] Centre Muffler
To: [email protected]
Date: Saturday, December 26, 2009, 7:38 AM
[alfa] Centre Muffler
Alfisti
This has been dicussed in the past somewhere in the digest but I cannot seem
to find the references.
I need to replace my loud exhaust system.
What makes the stock centre muffler quiet compared to after market types?
What type of construction/configuration is it?
Straight through, tri-flow, baffled, chambered?
Thanks
Nick T
1980 Alfetta GTV 2000
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