Fordnatics List Archive

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Mail From: "Anderson, Thomas L (Tommy)" <(email redacted)>



Hello Fellow Ford Lovers,

I appreciate everyone's input as to my muffler inquiry as
relates to aftermarket mufflers, mainly Flowmaster Vrs. Dynomax.
I got some rather interesting answers, and numerous opinions
as one might expect. Since there were a few requests to post
my results, I decided I would do so. So if you're satisfied with
your present mufflers, you might want to bail out now, but I'll try
to keep it short. In each case the car in question was a 5.0 'Stang.

From eight folks who responded, five had installed and were
using the Flowmaster mufflers, although one had reservations
about the volume of noise they produced and said they had
developed rust problems. But most owners of both brands
reported no rust or installation problems. In almost all cases the
Flowmasters were either stated or assumed to be of the two
chamber variety. The rest of the Flowmaster group descibed
their mufflers as "they rumble like hell', "louder but not unbearable"
"healthy sounding "and "can recognize the car a block or two away"
But most weren't really complaining. Some of the Dynomax owners
comments were "sounds damn good"(that was a cat-back system),
"sounds wonderful" and "like them just fine".. Some owners of both
said there was a pretty good resonance at the famous 2000 RPM
zone. One owner said the tone actually mellowed with aftermarket
exhaust headers. Okay, so it's up for conjecture and it's not scientific,
but it did answer some of my questions, and I appreciate those who
responded. It would be interesting to know if any owners of these
two brands of mufflers had ever received a noise ordinance
violation ticket. But that could very much depend on locale and
how hard one was standing on the "loud" pedal at the time.... [
Personally, I'm leaning toward the Dynomax's, especially since
price is very much a consideration from where I stand...

Now, in the meantime, I did locate my Super Ford mag. (Apr '90)
that did test several different mufflers using the J. Bittle American
dyno facility. The engine used was a 5.0 with underdrive pulleys
and big-tube shorty headers. In reading the chart and article, I had
forgotten there were a few surprises. For instance, the fact that plain
old bullet-type glass-packs did so well, no mufflers (straight pipe)
did worse, and the stock mufflers did pretty good. If fact, they article
hinted that aftermarket headers might be money better spent. I'm
going to summarize a good bit for the sake of space and time, but the
article was about 5 pages long. Incidentally, I have not tried it myself,
but in one of the latest Super Fords, they reported that they were
now on line at:

(email redacted)
or
(email redacted)

SUPER-FORD DYNO MUFFLER COMPARISON/APR. '90

Stock Flowmast. Flowmast. Pacesettr Walker Strait.
Muffs 3-Chamb. 2-Chamb. Glasspks. Dynomx Pipes

H.P. 233.1 238.6 236.3 242.3
239.3 235.5
RPM 4679 4953 4653 4949 4954
4639
DBs 101 104 105.5 106
105 116

If anyone has any specific questions, I will keep the article handy
and reply as time permits........

T. A.

This read-only message was archived from a public mail list.
Mail From: Roger Hupfauer <(email redacted)>


>From (email redacted) Thu Dec 15 15:15 PST 1994

>
>
>
>Hello Fellow Ford Lovers,

>
> (email redacted)
> or
> (email redacted)
>
> SUPER-FORD DYNO MUFFLER COMPARISON/APR. '90
>
> Stock Flowmast. Flowmast. Pacesettr Walker Strait.
> Muffs 3-Chamb. 2-Chamb. Glasspks. Dynomx Pipes
>
>H.P. 233.1 238.6 236.3 242.3 239.3 235.5
>RPM 4679 4953 4653 4949 4954 4639
>DBs 101 104 105.5 106 105 116
>
>If anyone has any specific questions, I will keep the article handy
>and reply as time permits........
>
> T. A.
>
>
Bear in mind that this is a four+ year old test; I think Flowmaster
has made several changes to the design of their muffler. I don't
know about the others.