ausmini :: View topic - Does anyone exhaust wrap?

Incidently the opposite is true on the inlet manifolds - something even Visard refers to

Oh and port-match your extractors to your head before coating them.

So with the inlet inlet manifold you're wanting to keep it cooler inside, rite?

And pardon my ignorance - what do you mean by "port-match"?

I wrapped mine and am having no probs.
I can't get my head around the theory that it makes the pipes rust faster. I can't see moisture being trapped in there or the wrapping staying damp when you consider the temperatures involved.
Peter.

peter1 wrote:

We get it on the big ship donks. The exhaust pipes are lagged by inches of insulation. With no place for the heat to go it gets pretty hot inside the pipes. The exhaust temperature can build up to a point where small pieces of metal will superheat and blow out the stack if the engine's are run too hard. Therefore the exhaust temps are monitored to remain below 900. Otherwise the steel will erode and a hole will develop.

Mini engines aren't usually flogged this hard, but it still can happen in a small way when the metal gets overheated.

Author:	mattsmadmini [ Wed Aug 27, 2008 9:48 am ]
Post subject:	Does anyone exhaust wrap?
Thinking about getting some to do a set of LCB's anyone else use it... anyone have any thoughts on the stuff?

Author:	1018cc [ Wed Aug 27, 2008 9:50 am ]
Post subject:
I have read on here before that the exhaust can start rusting under the stuff if it gets wet (doesn't dry out as easily as nothing). Unless you are really concerned with under bonnet temperatures (turbo etc) I wouldn't bother (IMHO).

Author:	Mick [ Wed Aug 27, 2008 9:52 am ]
Post subject:
I had it on a 3 branch for 10 years and then wrapped a set of LCBs. I've used it and had no problems. It kept the bulkhead temps down up in the tropics quite nicely. Some have had problems of the metal being eroded inside due to the extreme heat withing the pipes caused by the thermal isulation. It can be had very cheaply by the way as woven fibreglass wrap from places like Blackwoods for about 40 dollars per 50mm x 20 meter roll.

Author:	Hanra [ Wed Aug 27, 2008 10:08 am ]
Post subject:
Ive wrapped my pipes up all the way down to the diff region. Been like that for 5yrs (9000 miles). All seems ok.

Author:	slide [ Wed Aug 27, 2008 1:18 pm ]
Post subject:
I've had the extractors on my V8 wrapped for years with no problems. Certainly cools things down in the engine bay, and seems to make it run a little quieter. Just about to wrap a Maniflow Stage 2 LCB to go on the new 1360.

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Does anyone exhaust wrap? https://www.ausmini.com/forums/viewtopic.php?f=2&t=45230	Page 1 of 2

Author:	Timinik [ Wed Aug 27, 2008 1:33 pm ]
Post subject:
I have read about it in the past, most people seem to prefer the coated extractors instead, HPC i think its called... edit: unsure of cost tho

Author:	peter1 [ Wed Aug 27, 2008 1:43 pm ]
Post subject:
I wrapped mine and am having no probs. I can't get my head around the theory that it makes the pipes rust faster. I can't see moisture being trapped in there or the wrapping staying damp when you consider the temperatures involved. Peter.

Author:	smiling_simon [ Wed Aug 27, 2008 1:50 pm ]
Post subject:	re: exhaust coatings
$200 or thereabouts for HPC or jet hot coatings, inside and out. They won't rust, drop engine bay temperatures and don't make it even harder to get to your manifold nuts unlike wraps If you really want to keep it cool get it coated AND wrap it. But don't be cheap and sandblast it then spray paint it with super-cheap exhaust coating on the outside... you need to reflect the heat on the inside! Incidently the opposite is true on the inlet manifolds - something even Visard refers to Oh and port-match your extractors to your head before coating them.

Author:	Lillee [ Wed Aug 27, 2008 1:51 pm ]
Post subject:
I highly doubt it makes a difference to be honest. Was dead set on Jethot coatings, but for a road car it would make hardly any difference to warrant doing...

Author:	Flute [ Wed Aug 27, 2008 2:03 pm ]
Post subject:
I had my new LCB's ceramic coated by HPC in Wonthaggi. Cost $264- including GST and freight to get them and the inlet manifold (outside of manifold only) done. Looks great, prevents rust, doesn't discolour and reduces heat. I'm happy. Good service and quick. Google HPC for more info.

Author:	awdmoke [ Wed Aug 27, 2008 2:48 pm ]
Post subject:
Wrapping doesn't cause rust, but it does collect the rust flakes so it make look like a wrapped header is rusting more. Makes a big improvement in summer engine bay temps.

Author:	Moriarty [ Wed Aug 27, 2008 3:26 pm ]
Post subject:	Re: re: exhaust coatings
smiling_simon wrote: Incidently the opposite is true on the inlet manifolds - something even Visard refers to Oh and port-match your extractors to your head before coating them. So with the inlet inlet manifold you're wanting to keep it cooler inside, rite? And pardon my ignorance - what do you mean by "port-match"?

Author:	Anto [ Wed Aug 27, 2008 3:31 pm ]
Post subject:	Re: re: exhaust coatings
Moriarty wrote: So with the inlet inlet manifold you're wanting to keep it cooler inside, rite? Yes. Moriarty wrote: And pardon my ignorance - what do you mean by "port-match"? Port matching means you make the size of the ports on the inlet manifold/extractors the same size as the ports in the cylinder head to increase flow.

Author:	Mick [ Wed Aug 27, 2008 6:14 pm ]
Post subject:
peter1 wrote: I wrapped mine and am having no probs. I can't get my head around the theory that it makes the pipes rust faster. I can't see moisture being trapped in there or the wrapping staying damp when you consider the temperatures involved. Peter. We get it on the big ship donks. The exhaust pipes are lagged by inches of insulation. With no place for the heat to go it gets pretty hot inside the pipes. The exhaust temperature can build up to a point where small pieces of metal will superheat and blow out the stack if the engine's are run too hard. Therefore the exhaust temps are monitored to remain below 900. Otherwise the steel will erode and a hole will develop. Mini engines aren't usually flogged this hard, but it still can happen in a small way when the metal gets overheated.

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Author:	peter1 [ Wed Aug 27, 2008 7:14 pm ]
Post subject:
Mick wrote: peter1 wrote: I wrapped mine and am having no probs. I can't get my head around the theory that it makes the pipes rust faster. I can't see moisture being trapped in there or the wrapping staying damp when you consider the temperatures involved. Peter. We get it on the big ship donks. The exhaust pipes are lagged by inches of insulation. With no place for the heat to go it gets pretty hot inside the pipes. The exhaust temperature can build up to a point where small pieces of metal will superheat and blow out the stack if the engine's are run too hard. Therefore the exhaust temps are monitored to remain below 900. Otherwise the steel will erode and a hole will develop. Mini engines aren't usually flogged this hard, but it still can happen in a small way when the metal gets overheated. Ah ha - makes sense. Thanks.