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Old 09-08-2013, 05:46 PM
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downpipe, heat wrap or not

I am going to order a downpipe this week. going with the 2 piece diamond eye. I wanted some opinions on heat wrapping the upper section, because it's next to the evaporator, wiring, and firewall.


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Old 09-08-2013, 05:56 PM
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Originally Posted by tony0713 View Post
I am going to order a downpipe this week. going with the 2 piece diamond eye. I wanted some opinions on heat wrapping the upper section, because it's next to the evaporator, wiring, and firewall.


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I don't have anything. Go for it if you want. It's not necessary to my knowledge.


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Old 09-08-2013, 05:56 PM
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I did not on my 94 (it still had the factory stuff over the firewall and AC box). If I was going to do anything about it, I would probably opt to have the DP ceramic coated. Cheers!
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Old 09-08-2013, 06:20 PM
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does the wrap make rust start prematurely


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Old 09-08-2013, 06:46 PM
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Quote:
Originally Posted by tony0713 View Post
does the wrap make rust start prematurely


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Simply put, yes.
The heat wrap keeps the heat in but also traps moisture (not that a downpipe will stay wet for long). I've had headers wrapped up before and it's amazing stuff, but it takes its toll on the pipes.

I really like the idea of ceramic coating it if you're worried. Or run a ss downpipe.

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Old 09-08-2013, 06:58 PM
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Your probably better off putting more reflecting stuff on the firewall and stuff than the actual pipe by the sounds of it.


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Old 09-08-2013, 07:13 PM
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My folks had a 6.9 with the ATS turbo system on it. The DP was wrapped up on it for 15 years. It only got driven about 3000/year at most though.

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Old 09-09-2013, 05:24 PM
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we wrapped the upper half of the downpipe on my 97. was it necessary probably not but I had the wrap on hand because we wrapped the up pipes.
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Old 09-09-2013, 06:10 PM
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Not necessary, but you can benefit from it. I know on my truck on longer trips in the summer, the passenger side floor can get warm. But not enough to cause damage of any sort. Its going to be a really tight fit to begin with. Most people have had to bend the seam of the firewall to get a downpipe to fit. So it could be a bit more work to allow for a couple layers of heat wrap.

Also something no one has addressed is it will be keeping heat in, and could result in higher EGT's. How much im not sure, but cooler is always better and not having it heat wrapped will allow the pipe to dissipate heat better. Air is a good insullater that will protect items close by.

If you must opt for something, I would say go with ceramic coating. But IMHO I feel the money could go better elsewhere for other upgrades that you can feel in the seat of your pants....
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Old 09-10-2013, 04:37 PM
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I just used the wrap from the factory downpipe, cut it in half, and strapped it as far as I can, especially along the transmission, my floor does not get that hot.
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