Q31. What temperature reduction can I expect with my coated exhaust.... - Our Performance RangeTM offers typical surface temperature reductions of 33%; so if your uncoated exhaust operates at say 600oC , then our ceramic coating will reduce this to just 400oC (so a massive 200oC reduction). This has a major impact on the amount of heat escaping into the engine compartment, and on the temperature of components close to the exhaust. Our ceramic coating has in fact been demonstrated to reduce general underbonnet temperatures by up to 50oC (122oF).

http://www.zircotec.com/page/frequent_questions/5

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Why do F1 engineers and Moto GP engineers not heat wrap their exhausts/manifolds?

Is it against the regulations?

If it's not against the regulations, then I guess they would be doing it if they felt it to be of benefit?

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone

They use other coatings not heat wrap

I makes me laugh when you start comparing what works on top level race cars to souped up shopping trolleys! F1 exhaust systems are Inconel and can handle ridiculously high exhaust temps, due to packaging constraints (proximity of very close fitting bodywork etc) they may well use ceramic or similar coatings to try and keep the heat in.
As for heat wrap, yes it's more likely to cause head warpage as often the heat will be trapped in the manifold for longer (especially with a convoluted system like ours come with as standard) but that needs to be weighed up against the detrimental effects of increased under bonnet temps (Detonation, failed electrical components, heat soak on coolers, radiators etc).
If you start doing things to your car that optimise performance in one area you are likely to reduce its lifespan or performance in another area. If you heat wrap on a road car you should expect reduced life of the manifold due to the increased heat and corrosion from trapped damp, and unless you allow a cool down period at the end of hard drives you risk warping the head. (less likely if your water/oil cooling system is well suited to the kind of abuse the car will be subjected to)

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R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars

Isn't the whole point in using manifold coatings because the extra heat makes the exhaust gases escape more quickly and efficiently, thus reducing exhaust gas blow back ?

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Pug fee`ver,

Pick a Bogey, buy a Pug.

Black 306 GTI 6 Standard, was 60k mileage, bargain!!

Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & =

Hot engine's dont 'perform' as well as the cooler ones.

Why would companies such as Aston Martin use cam coat ?

You dont get any more bhp from using a light fly or engine pulley yet there is still some noticeable performance from using those uprated parts.

I wouldn't use any heat wrap, but if i could i'd get the manifold coated then i would, they have tested the coatings with salt spray experiments etc.

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Pug fee`ver,

Pick a Bogey, buy a Pug.

Black 306 GTI 6 Standard, was 60k mileage, bargain!!

Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & =

i didnt think exactly in the way of corrosional effects, my 17 year old phase one gti for all intents still had its original exhaust manifold and it was/still is in pretty good nick, internally and externally. (even after bouncing 50 feet from my car attached to the engine)

i half imagine it could double that figure and still be in as functional condition.

heat wrapping or even a cermaic coating could cause internal 'skaling' or oxidization of the pipe to a larger extent due to the intense heat being trapped inside. however from the outisde the coating would keep up the appearance of alls well and will stop external oxidization. more so ceramic as it seals the outside layer airtight and would add a regidity to the pipe unlike wraps.

these scales... can flake off weakening the metal structure. pitting the internal surface making for uneven/interupted flow. these could block baffles etc reducing silencer lifespan and performance.

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the world is changed by people in sheds

stop scaring me :'(

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Team Wheelwhore
Team Limited Edition

Astor 306 Francorchamps RIP
Virtual Blue 208 GTi

The 6 manifold ?

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Pug fee`ver,

Pick a Bogey, buy a Pug.

Black 306 GTI 6 Standard, was 60k mileage, bargain!!

Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & =

Yeah mine was rusty, once sandblasted it looked very clean steel.

________________________________________

Pug fee`ver,

Pick a Bogey, buy a Pug.

Black 306 GTI 6 Standard, was 60k mileage, bargain!!

Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & =

Must be a rubbish grade of stainless then, the head joining part was very rusty enough to flake off, the pipes just looked the colour of rust.

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Pug fee`ver,

Pick a Bogey, buy a Pug.

Black 306 GTI 6 Standard, was 60k mileage, bargain!!

Clicky: [url =http://www.306gti6.com]click here[/url] remove the space between [url & =

I didn't know the standard '6' manifold was stainless. Is this definitely correct?

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"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone