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Exhaust Wrap? or no?

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Old Dec 9, 2009 | 07:57 AM
  #16  
RallyEclipse98's Avatar
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From: Lincoln, Nebraska
Originally Posted by chuntington101
Coat and wrap for the ultimate in heat retention. Coating the inside will also help to reduce the wear that happends on the header from the exhaust gasses.

I think most people use a silicone spray to reduce water absorption of the wrap.
Coating the inside? With a spray? I don't know how you could wrap the inside with the tape cloth.
Old Dec 9, 2009 | 07:58 AM
  #17  
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From: City of Champions
Originally Posted by mifesto
the negatives of heat wrap is possible but hypothetical only. i havent read or heard even ONE source stating any proof. the positives of wrapping is undeniable. i agree with Del Turbo. i've wrapped the stock cast manifolds for 50 - 60k miles already and i never seen significant increase in surface rust when wrap was removed.
I have experience with a down pipe that I wrapped on my WRX. The car was my DD. The pipe was a year old when I decided to wrap it. It was made by a company called M2 Performance. In 15 months I needed to replace the down pipe because of a crack. The down pipe back was still in good shape, as well as the bottom of the down pipe that wasn't wrapped. The pipe looked great until I removed the wrap... because of this I would not use the wrap on a DD.
Old Dec 9, 2009 | 08:05 AM
  #18  
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I would say leave it off, and wrap your downpipe, since our downpipes are closer to T/C and oil pan, my downpipe is wrapped for about a year now.

Last edited by tweakdsm; Dec 9, 2009 at 08:08 AM.
Old Dec 9, 2009 | 08:07 AM
  #19  
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Originally Posted by tweakdsm
I would say leave it off, and wrap your downpipe, since our downpipes are closer to T/C and oil pan.
Not to mention wrap is ugly in case you show your car.
Old Dec 9, 2009 | 09:35 AM
  #20  
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the cracking occurs because people wrap them incorrectly. if you over lap too much it creates hot spots in the heavily wrapped areas whoich eventually lead to the cracks. Ive also caught my old wrapped tubular mani on fire, but thats cause i was dumping straight on it....hadnt made the dump tube yet haha. and i hated having fiberglass on me everytime i worked on the car and all over my shop floor!
Old Dec 9, 2009 | 10:47 AM
  #21  
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Originally Posted by xtmx
I have experience with a down pipe that I wrapped on my WRX. The car was my DD. The pipe was a year old when I decided to wrap it. It was made by a company called M2 Performance. In 15 months I needed to replace the down pipe because of a crack. The down pipe back was still in good shape, as well as the bottom of the down pipe that wasn't wrapped. The pipe looked great until I removed the wrap... because of this I would not use the wrap on a DD.
there is also the assumption m2 performance make their DP's with low quality material(just playing devils' advocate)... also for most evo owners, the exhaust manifold is cast iron. compare that to thin material most DP's are made of theres no comparison... also remember many "stainless" steel exhaust components out there arent true stainless throughout.

as for the statement about it catching on fire, i've been in the 240 community and most are even more ghetto then DSMers.... 9 outta 10 guys were ebay'd out from fender to fender lol. seriously only way it will catch fire is if your leaking something flamable or the heat wrap is cheap and cant stand the temp.

Last edited by mifesto; Dec 9, 2009 at 10:51 AM.
Old Dec 9, 2009 | 11:22 AM
  #22  
Ted B's Avatar
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Almost every ss part herein is 304 stainless. 304 is basically consumer grade, mild ss. It's good enough to suit most applications, but it isn't impervious to a strongly oxidative environment.

To truly get something that is pretty much guaranteed to outlast the car, 321 ss is the ticket. It is also considerably more expensive.

Just FYI
Old Dec 9, 2009 | 04:36 PM
  #23  
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Originally Posted by Protostar1
Search, there are a few threads on here about this. I do not believe it is an issue of too much heat, its the heat cycles. The wrap can get the header or tubing very hot and the ambient temperature or water can cause a quick and larger than normal temperature change and crack the tubing. I might be wrong but this is as I understand it.
I did search. That is how I found this thread that is over 2 years old.
Old Dec 10, 2009 | 05:47 AM
  #24  
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From: UK
Originally Posted by RallyEclipse98
Coating the inside? With a spray? I don't know how you could wrap the inside with the tape cloth.
TBC or thermal barrier coating. Bassically a very high temp ceramic coating that helps reduce heat loss throught the manifold. speak to someone like swaintech (i think).

by coating the inside of the manifold its the coating that wears away not the actual stainless.

Chris.
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