muffler distance from body - JeepForum.com

 
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post #1 of 6 Old 06-14-2013, 09:46 AM Thread Starter
meater
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1981 CJ8 
 
Join Date: Sep 2007
Location: Delaware
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muffler distance from body

Just had a new exhaust installed on my Scrambler. No carpet. Lined with Raptor on the inside and under.

The person who installed it, put the muffler as close to the floor as he could... it's so hot that I saw water literally hit it and steam right off.

He lowered it to make it flush with the frame and put a heat dampener around it, but it's still pretty hot.

How far away are your mufflers from the body and do you have insane heat coming off of them?

thanks!

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post #2 of 6 Old 06-14-2013, 10:34 AM
ASteve
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1972 CJ5 
 
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Location: Nor-Cal
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Good Ol JF will not let me upload a 640 kb photo

But here's a link to a photo that shows the distance I have with no hot floor problem.

http://www.jeepforum.com/forum/f8/da...l#post15241248

Hope this helps.

SC
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post #3 of 6 Old 06-16-2013, 01:21 AM Thread Starter
meater
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1981 CJ8 
 
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thanks! it looks like you're running pretty close to the body. can't figure out why mine is so hot.
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post #4 of 6 Old 06-16-2013, 10:32 AM
titomars
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1981 CJ7 
 
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when I bought my CJ7 the PO had a Flow Master on it. the muffler was no closer than 3 or 4 inches from the floor. That thing got the floor so hot you could fry eggs on it. I removed it and had a Magna Flow installed with no other changes. The problem was solved now my floor above the muffler is not any hotter than the rest of the floor.

1981 Jeep CJ7 4.0 HO, AX-15, D300, D30, D44, SOA
1977 Chevrolet C/10 step side 454 TH400 3.73 posi
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post #5 of 6 Old 06-20-2013, 10:05 AM
ASteve
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Quote:
Originally Posted by meater View Post
thanks! it looks like you're running pretty close to the body. can't figure out why mine is so hot.
Hey Meater,

You got me thinking...So, after I drove the jeep around I lifted up my carpet to check the floor for temp and I forgot I put carpet insulation down. I lifted that up and Wow! My floor was baking hot.

I think I'm going to go back to turbo style mufflers...

SC
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post #6 of 6 Old 06-20-2013, 10:27 AM
duffer
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1955 CJ3B 
 
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Install an aluminum heat shield between exhaust and tub. You can mount it directly to the hat sections, but it will work better and collect less debris with a little stand-off if you have the clearence. I just used 1/16" 5052 aluminum and rolled the edges a little for some rigidity.

As for the cross over pipe, I ran one on my 3B for 20 something years and they do mellow the exhaust somewhat. I used 2 1/4" pipe with a downward canted "nipple" welded into the header collector immediatly in front of the flange and routed the removable U shaped cross over pipe in front of the cross member and above the skid plate. It made greasing the front drive shaft a pain in the butt and was not re-installed when I replaced the headers (Hookers). Worthwhile? Probably not.

1955 CJ 3B, 381cid sbc (441cid all aluminum sbc coming soon), AGE M22W, Teralows, Warn OD, OBA, Premier Power welder, Warn 8274
1968 CJ 5, factory 225" w/ headers/450 cfm Holley, T86AA, Belleview winch, Warn OD
2012 Wrangler Rubicon Unlimited, Warn 9.5 xp-s winch
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