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Old 04-14-2009, 10:19 AM
RedBarchetta RedBarchetta is offline
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Join Date: Oct 2003
Location: Yorba Linda, CA
Cobra Make, Engine: SPF w/392CI stroker
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Quote:
Originally Posted by cdnus View Post
Dean,
I was able to get out yesterday for my first run with the replacement s/s mufflers...I did fab & install the transition cone in the inlet side...If you look at the posted photo by mickmate (above) you can see the difference in the upgraded version of their muffler....NOTE! I still get that fluttering sound on de-cel below 2000 rpm. & idle, but no tweeting with this set.

Regards Craig
Craig, thanks for the update. The upgraded mufflers don't look all that different to me...maybe a thicker weld bead along that 90* section to "build up" the deflection area, but I don't see much else. The fact that you are still experiencing that fluttering noise at/below 2,000rpm on d-cel, WITH THE REDUCTION CONE, concerns me greatly. Not from a performance standpoint, but just that this fluttering is a frustrating aspect that shouldn't be there.

I would suspect that the 2.5" ID are considerably quieter than the baseball-esque 3".

-Dean
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