Dynomax Ultra Flo vs Walker Muffler Comparison - sound levels and sounds!
We've compared two mufflers in search of quiet(er) performance.
*EDIT* Dyno results
are in! 443 rwhp and 490 rwtq. Taking into account the 1.5 degrees of
timing we added, the mufflers cost NO power. Before we made 422 rwhp and
EDIT EDIT: Car has run a best of 10.77 @ 128 so far... still some left in
EDIT EDIT EDIT: The car turned a 10.55 @ 129.3 and the block and trans let
go. A Dart 363 and a built Powerglide are going in!
Walker SoundFX 17809 - Ram 1500 4.7L
Just a quick video of my 04 Ram 1500 with the 4.7L v8. I replaced the
flowmaster 40 series that rotted off and wanted something quieter. This
muffler has a good low rumble and with the tailpipe it has almost no noise
in the cab. I got the 3" version because that's what I was told I needed
but I think it's 2-3/4" that I need. Oh well, I cut some spare 3" pipe and
slotted it to make a shim of sorts and clamped it down. Tailpipe is a
Magnaflow 15003 universal SS 3". All told I have less than $100 into the Exhaust.
Chevrolet Silverado 4.3 walker muffler
This is a stock single 2 3/4 exaust pipe with catalytic converter delete
and a cheap walker soundfx muffler.
I'm happy with it, 55$ and it just quiet enough. Sadly I can't say what did
what as far as sounds goes since I removed the (internally shattered)
catalatic converter at the same time.
It sounds better than stock but I don't know if it's louder because the
cat is no longer there or if it's the muffler that's louder.
first vid: open loop (cold start)
second vid (closed loop, o2 sensor kicked in)
third: rev to 3k
four and fifth: acceleration with and without clutch
Why Catalytic Converters Fail - Walker Exhaust Video Series
This video is about catalytic converters and what causes these
sophisticated components to fail.
Any number of problems can damage a converter. And these issues must be
corrected before installing a new one.
There are four primary types of converter failures: poisoning, coated or
oil-fouled substrate, overheated or melted, and structural damage.
Learn more about these four types of failures and the common causes for
these failures by watching this video.
Bottom line, these components don't fail on their own -- an outside issue,
often related to the ignition, fuel system, engine or engine controls, has
caused the failure. And you've got to fix the root cause if you want your
replacement converter to last.
Thirteen Steps for Diagnosing Emissions: