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Author: Subject: Exhaust heat wrap, whats the difference
martinnitram

posted on 15/11/17 at 11:00 PM Reply With Quote
Exhaust heat wrap, whats the difference

I'm going to wrap my exhaust manifold to keep the heat down a bit as my water pipes run close to the manifold.

I see some on t'bay for about a tenner and there's some in Demon Tweeks for 40 - 50 quid, I know you get what you pay for so whats the difference, is the £10 stuff likely to burst into flames ?

Never used this stuff before so want a bit of input from those on here that have.

Thanks

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coyoteboy

posted on 15/11/17 at 11:25 PM Reply With Quote
I used some £10 stuff on my tin top a while ago, was fine but quite loose-weave. It wrapped loosely and was very itchy. I think the more pricey stuff is tighter weave, smaller threads, wraps a bit neater. The neater weave also might hold a little less moisture when it gets rain/puddled on.





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bikecarbfred

posted on 16/11/17 at 06:30 AM Reply With Quote
You've got to put it on right and have it wet abit so it stretches so when it dries it tightens up further.
For me good quality one lasted about 2-3 years before it started breaking up i.e bit of woven material breaking off it.

On my next build I am going to brush up the header and have it ceramic coated but I'm only willing to spend £200 max on it. I have a 4-2-1 exhaust header.

Also you said you never used the stuff before so don't be scared when you see loads of smoke coming out of the engine bay when you go for your first run. obviously stop the car and double check. It goes away after that.

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neilp1

posted on 16/11/17 at 08:07 AM Reply With Quote
I used some of this

https://www.designengineering.com/category/catalog/dei-cycle/motorcycle-exhaust-pipe-wrap-kits/titanium-exhaust-wrap-lr-technology

Can't remember where I bought it though. Was a pain to fit and my back was knacking!!.

Been on 3+ years

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Andi

posted on 16/11/17 at 08:58 AM Reply With Quote
quote:
Originally posted by neilp1
I used some of this

https://www.designengineering.com/category/catalog/dei-cycle/motorcycle-exhaust-pipe-wrap-kits/titanium-exhaust-wrap-lr-technology

Can't remember where I bought it though. Was a pain to fit and my back was knacking!!.

Been on 3+ years


I used that on my old car. The gold colour looks really well and it was definitely thicker and better quality than the cheap stuff I got from a Chinese website recently

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ttalps2000

posted on 16/11/17 at 09:37 AM Reply With Quote
I have the same issue, but I'm going to wrap the water pipe instead of the manifold. Might be a better option?
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motivforz

posted on 16/11/17 at 12:54 PM Reply With Quote
magmawrap was the one I used on my car, and I used around 20m for a 4-1 manifold for a crossflow engine. Has been on for 2 years and looked pretty good in my opinion.


[Edited on 16/11/17 by motivforz]

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jossey

posted on 16/11/17 at 07:59 PM Reply With Quote
I tried it on my manifold to reduce under bonnet temps. Oh my gosh it ichys so much as mentioned above. Wear gloves and overalls.

Also it made very little difference so I took it off.





Thanks



David Johnson

Building my tiger avon slowly but surely.

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Angel Acevedo

posted on 16/11/17 at 08:15 PM Reply With Quote
quote:
Originally posted by ttalps2000
I have the same issue, but I'm going to wrap the water pipe instead of the manifold. Might be a better option?


For hoses look for Parker Hannifin Stratoflex Fire Sleeve.
Good enough for hoses in planes...


And regarding headers, I was thinking if one could make a homemade coating using liquid glass and some kind of filler.





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martinnitram

posted on 16/11/17 at 09:05 PM Reply With Quote
Thanks for replies.

Ill give the cheap stuff a go then, good shout bikecarbfred regarding the smoke on the first run, I can just see myself pulling over in a panic thinking my cheap wrap has gone up, ! lol

So the general idea is to glove up, wet it and stretch it.

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SPYDER

posted on 17/11/17 at 01:36 PM Reply With Quote
I used some of the "titanium" coloured wrap off ebay for my stainless manifold despite reading various scare stories.

"Welds will crack."
"Engine temps will go up."
"You'll go blind."

Maybe that last one was to do with something else but 3 years on the wrap is still there and I'm not blind.
I also wrapped the pipe before the silencer but found that it was prone to slipping around the bend.
To combat that I put a lockwire "cage" around it to hold it in place. Works a treat.
I did struggle to wrap the collector so I gave up on that and covered that with a sleeve made from the alu heat mat
type stuff, cut to shape then stitched with brass paper rivets.

My previous mild steel manifold had developed a crack under heat wrap but I put that down to being a 30 year old piece of shit.
The manifold I mean. Not me. I'm a lot older. I do, however, admit to having a crack but I usually keep it under wraps.













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David Jenkins

posted on 17/11/17 at 02:14 PM Reply With Quote
When my car's exhaust was wrapped I used to get one loud backfire every time I turned the engine off after a run - my wife always knew when I was home - but I never worked out why it happened. I guess there must have been some fuel vapour getting into the hot manifold after stopping, but I have no evidence either way. It stopped doing it after I took the wrap off...

I'm thinking of re-wrapping (more for safety reasons than anything else - burnt hands and legs) but it may be OK now as the car has totally different carbs.

My main worry is that the last time I did it, I cut my hands to ribbons on the stupid metal fixing straps that are traditionally supplied - they're like razors. Next time I'll get good-quality jubilee clips.

Oh - and I also got scared to death on my first drive after wrapping, with smoke pouring out from under the bonnet!





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