| Insulated exhaust? [message #333771] |
Wed, 20 June 2018 21:19  |
Rick Staples
Messages: 126
Registered: May 2014
Location: Johnstown, Colorado, USA
Karma: -1
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Hope this isn't a silly question, but I've been thinking of wrapping the exhaust pipes and mufflers with some of the insulating products (header wraps, muffler shields, etc)found on the performance equipment sites. Thinking this might reduce the amount of heat delivered back to the gas tanks. (I already added heat shields between the tanks and the tailpipe similar to those used on California coaches. Seem to help a bit.) Just wondering if anyone has tried this approach, and what your results were.
Rick Staples
'75 Eleganza ('The Dancing Bear')
Johnstown, CO
Rick Staples, '75 Eleganza, Johnstown, CO
"Advice is a dangerous gift, even from the Wise to the Wise, and all paths may run ill." -Tolkien
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| Re: Insulated exhaust? [message #333777 is a reply to message #333772] |
Wed, 20 June 2018 22:23  |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Senior Member |
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I have seen this done on 4 wheel drives (in magazines) where the exhaust system is in REALLY close proximity to drivetrain components, but I would think it might promote corrosion of your pipes and mufflers, unless they are Stainless Steel.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: Insulated exhaust? [message #333781 is a reply to message #333772] |
Thu, 21 June 2018 00:15 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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It is common to wrap exhaust systems on airplanes and helicopters but only on daily fliers. Aircraft exhaust systems run much, much hotter but wrapped ones still corrode, rust, deteriorate if not flown daily.
I would not recommend it on a once a week or less used vehicle.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Insulated exhaust? [message #333820 is a reply to message #333771] |
Thu, 21 June 2018 21:48 |
Rick Staples
Messages: 126
Registered: May 2014
Location: Johnstown, Colorado, USA
Karma: -1
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Senior Member |
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Thanks for the replies. I'm not worried about embrittleing my headers as I run cast iron manifolds. Less noise, less heat, and less crowding in the engine room. Some day in the future when a total engine rebuild becomes necessary, I may have the exhaust ports in the heads separated by welding and resurfacing, but until then I don't think headers would do all that much good. And yes, I am slightly concerned about accelerating rust under any exhaust wrap, which is one reason I asked if anyone had tried it, but I guess no one has. It's so dry here in Colorado, I'm still running the exhaust system that was in the Dancing Bear when I bought it over 20 years ago. Growing up in New England, where mufflers lasted 3-4 years if you were lucky, I willing to gamble on rust.
Finally, thanks for the usual good advice, JimK. Wish I'd thought of moving the fuel lines and selector valve outside the frame before I dropped the tanks and completely replumbed the system last year. Next time I'll follow your plan (or something like it). And yes, I have purchased many things from Applied GMC, and will in the future. Thank you, Jim,, for all you do to keep our classics running.
Rick Staples
'75 Eleganza
Rick Staples, '75 Eleganza, Johnstown, CO
"Advice is a dangerous gift, even from the Wise to the Wise, and all paths may run ill." -Tolkien
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| Re: Insulated exhaust? [message #333821 is a reply to message #333771] |
Thu, 21 June 2018 23:02 |
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GMC2000
Messages: 193
Registered: March 2018
Location: Georgia
Karma: -3
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Senior Member |
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what I was trying to get across is that it may weaken the mufflers too just like it is notorious for with headers and why it voids warranties by most header manufacturers.
it will increase the muffler temperatures a quite a bit and they will probably self destruct much sooner than they would without the wrapping.
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