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M380 (Unique Issues) If you have a unique issue with your M380 model coach and it can't be answered in one of the other forums here, then this is where you can list it.....list your M380 Parts here too.

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  #21  
Old 12-17-2015
CaptPegLeg CaptPegLeg is offline
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BajaChuck, you're too far from the ocean. The chance of of some ding dong in West Marine knowing the heat range that flapper is able to withstand is just about the same as asking your local parts dealer what the heat range is of something. Maybe the manufacturer could opine on the heat range but for the application it's not usually important.
My guess is it'll work...for a while. And that might be quite a while, I think. And then it'll hit Ron's tailgater. If I were installing it, maybe some of the header wrap stuff around the pipe to insulate the rubber where it clamps on the pipe would help it last.
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  #22  
Old 12-17-2015
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I would expect the West Marine clerk to know as much about the heat range as my dog would.

I have a WM Port Supply card so I am going to pay a little under $40.

The wrap is a good idea but based upon what I have read here in WOG the pipe itself should not be extremely hot. The hot gas might be, however.

This is an experiment but if anyone has tried something like this and it didn't work I can refuse the part when it arrives.

P.S. I just copied this from Van's post in "Exhaust"

...The volcano tape I have works. On the way from AZ to TX last week I shot some temps after a long hill country run at average 70 mph in cool (for Texas) 78 degree ambient temps and was pleased:

1) chase wall inside coach, rear closet with closet door closed - 78 (slightly below ambient temp inside coach )
2) chase wall inside coach, adjacent to bed - 82 (ambient)
3) up top, chrome exhaust turnout at mid 90 degree bend (slipstream cooled) - 107
4) wrapped 60 degree elbow at bottom - 136
5) bare bellows - 227
6) wrapped S pipe just before bellows - 155
6) exposed metal pipe just before wrap at turbo - > 330 __________________
Van & Toni in TX & AZ
2004 M380 & 2013 Fiat 500 Pop
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2004 M380 Double Slide (Sold)
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  #23  
Old 12-17-2015
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Randy Dupree Randy Dupree is offline
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i don't think any kind of rubber is going to like your exhaust temps at 60mph.
When i follow other birds,i can see the heat waves come out the stack.
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  #24  
Old 12-17-2015
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we all gotta try some times --might work

but metal will work for sure~! wonder why they never did a alum flapper?????
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  #25  
Old 12-17-2015
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I would not think the temperature would be a lot cooer than what the Pyrometer reads. Perhaps two to three hundred degrees less at the end of the exhaust pipe but it is hot. Ever noticed a burnt up mud flap that was mounted too close to the exhaust pipe?
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  #26  
Old 12-17-2015
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Maybe John Finn could insert a poll here? 40 bucks is 40 bucks after all.
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  #27  
Old 12-17-2015
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Bumpersbird Bumpersbird is offline
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AI have a Stailess steel flapper on my straight pipe for several years now works well. Costs around $25 bucks.
But I have a backup
Just after the flex connector I welded a down section of 5" pipe
Cut several slots in main exhaust
Any water intrusion goes into catch can
At the bottom of pipe I welded a 3" exhaust flang
Initially I was going to install an electric exhaust dump like on the hot rods
But opted for just a plate because those dumps almost always leak
If I get stuck in a hurricane I can loosen the bolt and the water drains out of exhaust before it gets to the flex section
Eventually I'll weld a pipe to the plate and a hose so it will drain on its own
So far I haven't need to do anything
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  #28  
Old 12-17-2015
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Randy Dupree Randy Dupree is offline
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Quote:
Originally Posted by RonC View Post
Maybe John Finn could insert a poll here? 40 bucks is 40 bucks after all.
Hey Ron,send me $20 and don't buy the rubber flapper.
See?
Saved you $20.!
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  #29  
Old 12-17-2015
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Ha Ha Ha, Randy

I am just about talked out of this. WM can put it back on the shelf when it comes in.

But, as I have said many times..."Nothing is fool proof for the determined fool" so I am going to continue to think about this. I don't see why you couldn't make the same thing with no rubber involved. A hose clamp like ring for the pipe and a light weight aluminum flap on a shaft with a spring around the shaft just strong enough to hold it closed when the engine is off.

Similar to this that would open wider...http://www.raneystruckparts.com/stra...ainless-steel/
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Last edited by RonC; 12-17-2015 at 03:36 PM.
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  #30  
Old 12-17-2015
BajaChuck BajaChuck is offline
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The tab behind the flapper/cover is a counter weight to compensate for the weight of the cap and the reason the cap bows open when the wind blows in the right direction, if the wind has rain in it the cover makes like a back stop to make more rain go into the pipe.
Putting the cover vertical would make the cap stay closed maybe causing too much back pressure. I think a tab/counterweight could be welded onto the tab to fix that problem.
About that rubber flapper. Exhaust can be hot enough to melt aluminum pistons. Around 1400 degrees but the combustion gas should be down under 1100 degrees. That would be right at the exhaust ports and much cooler at the top of the stack. Fire happens sometimes in the stack so the muffler can get pretty hot. Diff. rubber melts at diff temps so maybe it will be good for around 800? Anyway I just thought it might be worth checking. if the rubber flapper can take the heat it's a great idea and will fix the above problems.
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