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Re: [GMCnet] Muffles [message #318158 is a reply to message #318119] |
Mon, 29 May 2017 16:19 |
captjack
Messages: 271 Registered: February 2010 Location: Sebastopol, California
Karma: 1
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I've got 40's on my coach. I think they're too noisy and even more importantly my wife doesn't like them. I've been thinking about changing them out. I was under my coach and found that the aluminum body panel above them was cooked and distorted. Flowmaster makes heat shields and after sucuring the aluminum panel back up, I'm to install the shields. I've read that they reduce the noise. I'm hoping they do, but probably not that much. I was thinking of putting a piece of lead sheet between the shield and the muffler for further sound reduction, but looking at exhaust temps and the melting point of lead, thought better of it.
Jack Christensen - K6ROW,
'76 Glenbrook/Clasco - "The Silver Bullet",
Sebastopol, CA
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Re: [GMCnet] Muffles [message #318169 is a reply to message #318119] |
Mon, 29 May 2017 19:22 |
JohnL455
Messages: 4447 Registered: October 2006 Location: Woodstock, IL
Karma: 12
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40s can hardly be called a "muffler". I put a 2.5/2.5" series 50 on my Jeep as it was all I could find in the config I needed and it's throaty but tollerable with no brash RPM range. Some cheap mufflers are like megaphones at certain pulse rates.
John Lebetski
Woodstock, IL
77 Eleganza II
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