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<font size="-1"><font face="Arial">Hello Charley,<br>
<br>
Nothing to do with mufflers, resonators, silencers or
whatever. I built an MGB GT V8 from the ground up and I was
determined that it would be refined so I developed my own
soundproofing material. The result was fantastic. My cabin
is much quieter, my doors close with a clunk not a clang and one
could hear the radio easily - if I had one !!! I am now doing
my next car and using BaryMat which has great specs (we will see
what it is like when car is on the road !!!). But do not use
"popular" "well advertised" material such as Dynamat.<br>
</font></font><br>
<div class="moz-cite-prefix">On 11/28/2017 11:04 AM, Charley &
Peggy Robinson via Mgs wrote:<br>
</div>
<blockquote type="cite"
cite="mid:c3547908-fb91-47a7-e5e5-d3cad0403680@ktc.com">I'e been
rethinking this. First, I used the term "front muffler" in my
earlier post. Actually, it's not a muffler; it's a resonator.
It's essentially an expansion chamber whose purpose is to cancel
out the high frequency exhaust pulses; the serp barks IOW. Some
resonators have a shell within a shell with insulation in between
to do some quieting; some don't.
<br>
Since it appears that the exhaust sound you object to is localized
in the cockpit area, I wonder if your resonator might be cracked
or possibly touching the underside of the floor pan or a loose
connection. If not, increasing the resonator volume or its type
of construction & insulation might be a way to go. Just have
to get the car on a lift and have a look-see.
<br>
<br>
CR
<br>
On 11/27/2017 6:40 PM, John Difede via Mgs wrote:
<br>
<blockquote type="cite">Thanks to all for your advice and
comments. I am reconsidering my idea to purchase a new exhaust
system because I have no guarantee that it will be quieter than
my current exhaust. I am thinking of replacing my middle “bomb
box” section with the oval shape muffler and see where I end
up. If need be I can then replace the rear section. I am
planning to use mild steel connected to the stainless front
pipe.
<br>
<br>
John DiFede
<br>
1973 MGB
<br>
Sent from my iPhone
<br>
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