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Author Subject: heat wrap
jalittle

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Location: Dover

Registered: 07 Feb 2010

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Post #1
i am planing on heat wrapping my manifold and decat how much would i need to do it
Posted 17th Jul 2011 at 00:17
bigbadbowen

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Location: Winchester

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Post #2
I doubt you will be able to heat wrap a std manifold ?

Just buy a roll see how far it goes ?

Posted 17th Jul 2011 at 00:32
devere

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Location: Saxtead

Registered: 16 Dec 2008

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Post #3
bigbadbowen wrote:
I doubt you will be able to heat wrap a std manifold ?

Just buy a roll see how far it goes ?



I did mine, it is a royal pain in the backside though. I think i used 20 metres of 2 inch wide wrap.... there wasnt much left at the end. I THINK it was 20 metres.. bare in mind how much you need varies greatly depending how wide it is.
Posted 17th Jul 2011 at 00:44
devere

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Location: Saxtead

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Post #4
This will help.

http://www.heatshieldproducts.com/Instruction/ExhaustWrapISheet.pdf
Posted 17th Jul 2011 at 00:48
dav1

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Registered: 20 Jun 2011

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Post #5
i did mine time consuming but worth it

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Posted 21st Jul 2011 at 01:26
swiftyboi006

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Post #6
Is it worth heat wraping a decat if my manifold isnt heat wraped? And also what are the benefits from heat wraping, sorry for the steal

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Posted 12th Aug 2011 at 18:06
pete_rallye

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Post #7
Not a lot of benefits really. I've done a standard manifold, and also a de-cat. The wrap on a standard manifold needed a lot of steel ties to hold it in place, because its so twisty its hard to get a nice tight wrap all the way round.

I did the de-cat because the exhaust tunnel used to get red hot in my track car with the heat that came off of it. I would't bother doing it again, not for what the stuff costs. If it was cheaper I would consider it, but its pretty expensive stuff.

There are also arguments for it keeping the heat in the engine which is believeable, as the manifold acts as a good radiator to get rid of the heat.

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Posted 12th Aug 2011 at 19:13
beez_neez_gt

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Post #8
Its really not worth it, it can rust the manifold or catch fire and for not much benefit.

Try here > http://www.camcoat.u-net.com/Exhausts.htm

Cars like Aston Martin etc use these types of coatings and i know its more expensive the im sure the gains from it are much better.

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Posted 12th Aug 2011 at 20:28
burnout21

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Post #9
quote:
Its really not worth it, it can rust the manifold or catch fire and for not much benefit.

Try here > http://www.camcoat.u-net.com/Exhausts.htm

Cars like Aston Martin etc use these types of coatings and i know its more expensive the im sure the gains from it are much better.


Does Anyone know If these guys are still in business?
There E-mail isn't valid.. And the prices are as of 2002.
Posted 18th Feb 2012 at 18:44
stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

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Post #10
Personally, I wouldn't wrap an exhaust manifold.

There is evidence to suggest (as Pete points out) that the manifold does indeed act as a radiator and remove heat from the cylinder head. By wrapping it, you have insulated it and the heat stays in the cylinder head. This has been known to burn exhaust valves out prematurely. Yes

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Posted 18th Feb 2012 at 19:21
calibra306

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Post #11
There is also a lot of evidence showing reduced manifold life.

Cracking can happen very quickly especially on SS manifolds.

Also there is a risk of fire if the slightest of gaps appear in the wrap as the intense heat acts like a magnifying glass consentrating a spot of heat on what every it may be in the engine bay!

I have looked into various heat wraps and plasma coatings etc and came across a lot of negatives on the heat wraps!

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Posted 2nd Apr 2012 at 01:01
dav1

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Post #12
If it is so wrong then these coatings must be wrong too because they keep the temps in there? Why do so many ppl do it if it's so wrong ? Formula1 cars have the coatings an I consider my car on a par with one lol.

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Posted 2nd Apr 2012 at 21:16
welshpug!

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Post #13
coatings are a little different, they don't keep the heat in the metal as much, nor do they promote corrosion or fires.

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Posted 2nd Apr 2012 at 21:19
fatlapit

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Post #14
http://www.zircotec.com/page/home/1
These a
e the bots tospeak to dont bother with the cheap wrap stuff get it ceramic coated, they also have a faq page on their website to answer all the above questions!!!

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Posted 2nd Apr 2012 at 21:20
fatlapit

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Post #15
Q37. I have been told that I should not use exhaust wrap with my stainless steel manifold because it might corrode or even crack. Is this also true for your coating? - Here at Zircotec we have coated a significant number of stainless steel manifolds and exhaust parts without experiencing any problem. Our technical specialists confirm that stainless steel can corrode (very) quickly under certain conditions, though Zircotec's coatings serve to protect against this type of corrosion and cracking. Unprotected stainless steel can suffer very rapid intergranular corrosion in poorly controlled welds or where the material of construction is poor quality. There is also a little known phenomena called chloride stress corrosion cracking by which highly stressed parts, including those made of stainless steel (such as stainless steel exhaust manifolds) can undergo extremely rapid attack by chloride. This effect can be so pronounced that the stainless steel parts will appear to have just rotted away. The worry here is that the materials used in exhaust wrap can often contain chlorides, and these can be released when the exhaust wrap gets hot. Furthermore, many chemical cleaners and road contaminants that might get trapped in exhaust wrap do also contain chloride materials. In view of this, our technical specialists advise that exhaust wrap should not be used on stainless steel manifolds or exhaust systems.

Whats very interesting is the last sentence.

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Posted 2nd Apr 2012 at 21:22
fatlapit

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Post #16
welshpug! wrote:
coatings are a little different, they don't keep the heat in the metal as much, nor do they promote corrosion or fires.


Coating the manifold simply reduces the amount of heat escaping from the manifold and exhaust system

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Posted 2nd Apr 2012 at 21:23
eddy_gti6

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Post #17
If you can be bothered with the f**k on of getting the nanifold off and stuff then do it. I think its too much if a hassle on to notice no difference at all. I have a heat wrapped gti6 in my shead never been fitted since i wrapped it. I will hunt it out!

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Posted 2nd Apr 2012 at 21:27
dav1

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Post #18
Is this scare mungering or should I go outside an rip the s**t off? Dave

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Posted 2nd Apr 2012 at 21:35
fatlapit

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Post #19
its pointless mate tbh

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Posted 2nd Apr 2012 at 21:37
dav1

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Post #20
Is this scare mungering or should I go outside an rip the s**t off? Dave

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Posted 2nd Apr 2012 at 21:50
eddy_gti6

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Post #21
If you have already done it then i would just leave it!

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Posted 2nd Apr 2012 at 21:57
coskev

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Post #22
Zircotec quoted me £230 to do a Gti6 manifold a couple of years backThumbs down

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Posted 13th Apr 2012 at 22:57
fatlapit

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Post #23
Worth every penny u get wat u pay for. imo bearing in mind this is for proper motorsport and it is one of the best ways of keeping the exhaust cool.

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Posted 14th Apr 2012 at 08:14
dragoon

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Location: Ghent - Belgium

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Post #24
I've done mine, because I didn't have a heatshield as standard (on the 1.8 with gti mani) so needed to protect the rest from the heat somehow




Big pain in the ass to do though, if you do it, wear protection, the fibre is extremely unhealthy, and apply it wet!

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Posted 14th Apr 2012 at 14:25
stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

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Post #25
fatlapit wrote:
Worth every penny u get wat u pay for. imo bearing in mind this is for proper motorsport and it is one of the best ways of keeping the exhaust cool.


How are you keeping the exhaust cool? By wrapping it you are insulating it meaning that it will stay hotter. Also, if you wrap a manifold, then the downpipe will get hotter as a result due to the gases passing through the manifold are not releasing heat to the outside.

In my humble opinion, I don't believe exhaust wrap is a good idea. No

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Posted 16th Apr 2012 at 16:35

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