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Mark,
How about an update?
Mike Wills
RV-4 N144MW
----- Original Message -----
Sent: Monday, March 09, 2009 5:08
AM
Subject: [FlyRotary] Re: DNA
Muffler
Mike,
It may be a little premature to declare it a winner, but with ~10 hrs on
it now, it is holding up better than anything I've tried so far. Keep in
mind that this is DNA's best muffler, rated for 1000hp. It is made
of fairly thick SS, .030 if I recall, much thicker material than most
mufflers. I had to add a 3" to 2" taper to the outlet in order
for it to be acceptable in the noise category, but
that was surprisingly effective in reducing the exhaust noise
to an acceptable level. (Maybe I should have just put the reducer
on the 3" downpipe and saved some weight.) Anyway, when it passes 25
hours, I'll post another update. At this time it is looking very
promising.
Mark S.
On Sun, Mar 8, 2009 at 9:20 PM, Mike Wills <rv-4mike@cox.net>
wrote:
Mark,
Any update on the DNA
muffler?
Mike Wills
RV-4 N144MW
----- Original Message -----
Sent: Friday, January 16, 2009 7:05
AM
Subject: [FlyRotary] DNA
Muffler
Does anyone on the list have any real-life rotary
experience with the DNA Gen II muffler ( http://www.dnamufflers.com/DNA/main_DNA.html)? It is an
interesting design in that it has no packing material to burn out.
Instead, it utilizes ladder-rungs, which they call "internal sound
diffusers", which resemble a chain of DNA down through the center of
the muffler body, which is made of 304 SS. Their web site claims
that the racers use them with great success. From speaking with a
sales rep, they claim there the rotary crowd uses them too. I'm
considering purchasing one of their FULL THROTTLE COLLECTOR mufflers (P/N
1040), but thought I would check to see if anyone else has used this
style muffler. This muffler has a 3" inlet/outlet with a 4"
body. So it is compact enough to fit inside my cowl. My
exhaust header has a 3" swivel joint, so it should be a good fit.
Mark
S.
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