Heat Wrapping Manifold?

[Boydy 0]

Hi guys, just brought a new 6-3-2-1 exhaust manifold for my car, i want to heat wrap it and have no idea on how much to buy in length and width, whats the best type and how many ties to buy also. If anybody has done this or there is another post up about it would be a great help!

Any other info or tips also

Thanks alot! Alan

[samthegram 10]

i wrapped a 4 to 1 manifold and used nearly 20 metres of 50mm wrap. you should get at least 40m to be on the safe side. i know that sounds a lot but i thought i would have plenty left over but used it all and could have done with another metre to be honest.If you soak the wrap in water first it goes on easier and then shrinks tight when it gets hot. By the way it is the most time consuming arkward job i have ever done :censored: Not wanting to put you off like :lol:

[Boydy 0]

Cheers,sent a message to a couple of other people and one came back saying I needed 38ft,and you said forty so so far 40 sounds around the right length.I can imagine its a pig of a job,but has to be done so there's no choice in the matter really!Ive always been the type to just get on and do something,no matter what it is,to get the end result I want/get to where I wanna go.No probs :D And im sure one of my mates will help us out with some kind of bribe! :lol:

[boost monkey 0]

you could do the maths and work it out yourself! :norty:

[drewiee99 0]

Spend the extra money and go for this from zircotec a thermal plasma coating no hassle and looks good to. Around 50% reduction in under bonnet temps from tests done at mira.

[ADZ_VR6 0]

Spend the extra money and go for this from zircotec a thermal plasma coating no hassle and looks good to. Around 50% reduction in under bonnet temps from tests done at mira.

 

 

Is that off the shelf item or is it cast around your manifold looks good :luvlove:

[KipVR 1]

how much did it cost out of interest?

[drewiee99 0]

Just send them what you want spraying and they do it within 10 days,its blasted on at around 1000c and is about 3 microns thick, if any one has this months evo with the zonda r check the standard white coating on that. they do turbo housings too and say they spool up 400 rpm quicker. I think it was around £200 ish for my manifold a vr6 would be around £300 but if there was enough interest i may be able to get a little discount as a forum/club.

[Boydy 0]

Looks really good but I think ill be sticking to the heat wrap tho.Thanks for your input and pic mate

[sparks 0]

please baring in mind that last time i wrapped a manifold i itched like crazy for 2 days as the fibreglass got into my pores

 

its bad stuff unless they have changed it recently

 

the spray on option prev mention then starts to look good

 

 

stu....

[plateletboy 0]

how does something that is only 3 um thick have such an amazingly low thermal conductivity..?!?

does it just block heat transfer by radiation - although it doesn't look very shiny..?!?

 

can i spray my house with it........ :lol:

 

weird........

 

pb

[VEEDUBBED 0]

I've wrapped two 3inch turbo downpipes with that wrap and all i can say is it's garbage,the stuff lasts a couple of months then turns to dust.

Sparky's right,if you use the wrap do wear laytex gloves as the itching will drive you apeshit,wear a dust mask aswell.

The 'Grafite impregnated' wrap is also bollox,it looses it's colour not long after you install it and smokes badly.

I bought the latest 'copper impregnated' affair but i'm not gonna fit it,30 squids wasted.

The downpipe also started rusting soon after installing even AFTER i'd applied two coats of high temp. paint as a protective primer :mad2:

Maybe the protective spray the company suggests to use would prolong the life of the wrap,who knows?,all i know is that the bloody stuff can't be posted abroad...

Remember to use a water spray bottle to wet the wrap whilst installing as it helps dampen down the dust.

[drewiee99 0]

PLASMA-SPRAY PROCESSING

General Plasma Spray Processing - Plasma-spray processing is a relatively specialised high temperature industrial process that utilises an electrically generated plasma to heat and melt the feedstock material. The process is capital intensive and requires significant electrical power. It offers a method of depositing a feedstock material (the material that is being plasma-sprayed) as a solid coating over an underlying target material. It can also be used to produce free standing parts made from just the plasma-sprayed material. Deposits having a thickness from just a few micrometers (µm) up to several millimeters can be produced using a variety of feedstock materials, including metals and ceramics.

 

 

 

The feedstock material is normally presented to the plasma torch in the form of a powder or wire. This feedstock melts rapidly within the plasma torch, where the typical operating temperature is ~10,000oC (18,000oF). It is then propelled as small molten droplets via a carrier gas towards the target material. When the molten droplets contact the target material they flatten, rapidly solidify to form a deposit that remains adhered to the target material. There are a large number of parameters that influence the interaction of the feedstock with the plasma jet and the substrate, and these parameters can lead to wide variations in the final product and product quality. These parameters include feedstock type and composition, feed rate, plasma gas composition and flow rate, energy input, torch geometry, nozzle design, nozzle offset distance, substrate cooling, etc.

 

 

 

The plasma-sprayed deposits consist of a multitude of pancake-like 'splats', formed by flattening of the liquid droplets. As the feedstock powders typically have sizes from micrometers to above 100 micrometers, the splats have thickness in the micrometer range and lateral dimension up to hundreds of micrometers. Small voids occur between the splats thereby trapping either air or the carrier gas whilst the splats cool rapidly leading to quite rapid crystallisation and large grain size. It is also possible for the deposited material to exist in metastable phases due to rapid cooling (i.e. crystalline structures that would normally only occur at very high temperature). Small micro-cracks and regions of incomplete bonding can also occur under certain plasma-spray conditions. The deposited material can therefore have properties that are significantly different from the bulk feedstock materials, eg. lower strength, higher strain thermal and electrical conductivity. By controlling plasma-spray parameters it is possible to control and make use of these changed material properties to suit specific applications.

 

 

 

This technique is mostly used to produce coatings on structural materials. It can be used to provide protection against high temperatures, corrosion, erosion and wear, or to change the appearance, electrical or tribological properties of the surface. The technique can also be used to replace worn material. Free standing parts in the form of plates, tubes, shells, etc. can be produced. The technique can also be used for powder processing (spheroidisation, homogenisation,modification of chemistry, etc.). In this case, the substrate for deposition is absent and the particles solidify during flight or in a controlled environment such as water.

 

 

 

Now see Zircotec's Plasma-Spray Process

 

 

 

Alternatively, to return to our Home Page Click Here.

[boost monkey 0]

That coating sounds mighty impressive, but is it really worth it on a stock manifold?

[drewiee99 0]

it is on the g60 as one i cant heat wrap it and two it will stop heat soak into the inlet as its sits on top, and hopefully more hp. It will also keep the engine bay a little cooler.

[Critical_Mass 10]

Is it a good idea to heat wrap or ceramically soak a cast iron manifold? wont it crack sooner or later?

[The_Dude 0]

Is it a good idea to heat wrap or ceramically soak a cast iron manifold? wont it crack sooner or later?

Surely metal expands as it heats and will put excess pressure on the ceramic coating?

[Critical_Mass 10]

I think the worry is more on the manifold itself being put under more pressure due to it retaining more heat and cracking. I've always read that you should never heat wrap / ceramically coat cast iron manifolds.

[Toad 0]

Yeah, I thought that wrapping cast manifolds was bad, but thin tubular manifolds needed wrapping to keep the temps up and help exhaust scavenging.

[drewiee99 0]

well ill let you know how i get on,zircotec never said anything about cracking they said it will help against corrosion.If it good enough for the lambo reventon,pagani zonda r,lichfield imports,Koenigsegg's CCX supercar etc i think my little g60 will be ok.

 

This technology also help the space shuttle survive re entry back to earth now thats hot.

[Critical_Mass 10]

Yeah but supercars wont use cast iron manifolds. :shrug:

[boost monkey 0]

Supercar EGTs easily pass 1000+ Celcius, I think their exhaust manifolds can stay plenty warm enough on their own even with thin walled tubular manifolds :wink: