RE: [alfa] Resonator replacement ideas

["Jeff Greenfield" <alfaguy@xxxxxxxxxxxx>]

Jon -

If you fit the early style 4 into 2 headers to a later car, all you need to
do is use the corresponding front pipe, which will then bolt up to the
standard front muffler. The early front pipe, has a resonator approx. where
the Cat is now on your car.

Of course doing this eliminates the cat, so this set up would have to be
reserved for um-uh track events and other sorts of off road use, right?

The series 4 cars, went back to a 4 into 2 header, with a front pipe that
incorporates a cat. I don't know if you could use the series 4 front
pipe/cat with the early headers, but I somehow suspect you could. Anyone
know for sure?

The front resonator, does not really have that much influence on the sound,
as I've heard a few cars that had them replaced with straight pipes by
quickie muffler shops that didn't know any better. I've heard though, that
not having it does hurt performance some.

Bigger changes in the sound, can be made by eliminating one of the mufflers,
and/or replacing one or both with glass packs. There has been much
discussion of this here lately.

HTH,

Jeff

-----Original Message-----
From: owner-alfa@domain.elided [mailto:owner-alfa@domain.elided] On Behalf Of Jon
Pike
Sent: Friday, February 13, 2004 4:41 AM
To: alfa-digest@domain.elided
Subject: [alfa] Resonator replacement ideas

Hi all..

I am getting a new cat to replace the 27yr old unit that is a rattly,
noisy, dead doornail..   I'm hoping that the new one will improve the
tone of the exhaust, (or at least not contribute so much noise to it!)
as well as clean it up.

But, "for off road use only" ;-) I have a pre 75 dual manifold, a needs
some work set of downpipes to fit, (or might get new) and was wondering
what might go on the other end to connect to the center muffler?

Early cars had a kind of  box that I was under the impression, was more
a resonator than muffler..  though I think I saw one cut open once,
about half cavity half muffler like damping.  Anyone have experiences
with using straight pipes, or small glasspack things there,  and how did
it influence the sound?

That, and a cheap source of a few flanges,  and I'll be set for several
kinds of motoring..

Jon
77 Spider
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