Exhaust Heat Wrap

[NisGTR]

I've just put on new aftermarket turbos with the new style tomei dump pipes. I have noticed that I have about 5-7mm clearance in between the front turbo dump to the second turbo. Would it be necessary to wrap up the dump pipe with heat wrap or not?

I've heard rumors about it that prevents the dump from cooling down too quickly and cracking, some say it traps heat in and causes it to heat up too much and also heard when metal cools, it sweats and it can cause rusting.

what are your suggestions?

[2LV8ETR]

Have you given ceramic coating a thought?

Expensive, but works really well.

[NisGTR]

how much is that stuff roughly?

[R31Nismoid]

Make sure you use the stock head shields, that is all.

Not even the track GTR's coming outta Racepace have wrapped exhausts, i don't see the need personally and haven't seen a lot of evidence to back it up either

[NisGTR]

ok how can I mount the stock heat shield to the new dump because it wont be a direct fit?

i'll go and check this out now.

[NisGTR]

would I get away with that much clearance 5-7mm without doing anything?

[Johnny]

im interested in ceramic coating too, saw a great feature on motive dvd; how much is the stuff?

[NisGTR]

here is a photo i just uploaded

[MrStabby]

Castle Hill Exhaust told me that wrapping stainless will cause it to become brittle over time, and they strongly encouraged me to avoid it.

[NisGTR]

would i run into any problems with it like this or not?

[2BNVS]

yeh my mate who does exhausts n stuff hates heat wrap as he also said it can make the metal brittle and weak over time. Ceramic coating is expensive but i love it, gives a nice clean look to it, and works great.

ben...

[badhairdave]

If it's a street car I don't think you'll have an issue with it being that close as there's nothing to melt in the area.

However, if you plan to track it some form of heat sheild is worth doing, whether you modify the stock ones or make some new ones out of sheet metal or that acl stuff you can get from supercheap. Thermal management is a major consideration for track work as you are generating lots of heat for reasonably long periods of time and it will just soak into surrounding bits of metal and ultimately attack anything perishable (rubber/silicone etc).

[J'z-R33]

im interested in ceramic coating too, saw a great feature on motive dvd; how much is the stuff?

Use as a guide only..

Parts had to be stripped before taking them in. ie they wont disassemble anything (workshop liability which makes sense)

RB26 Twin 6boost Manifolds (External coating only, high polished Silver) $250.00

2 x Turbo Intake and Exhaust housings (External coating only, comp housing high polish silver, exhaust housings black) $160.00

2 x Split Dump pipes (internal and external coating, high polished Silver)

$120.00 per metre

Done by Competition Coating in Guilford.

Cheers,

Johno

[bigmikespec]

here is a photo i just uploaded

S**t, that is a good photo that shows how close the dump pipe is the turbine housing, not nice!

[NisGTR]

thanks for the reply guys, problem fixed I put a welding shield which is abit stiffer then the normal heat wrap around the part where is needed and put a clamp around it, its not covering the dump pipe that much so it wont be a problem.

[Johnny]

Use as a guide only..

Parts had to be stripped before taking them in. ie they wont disassemble anything (workshop liability which makes sense)

RB26 Twin 6boost Manifolds (External coating only, high polished Silver) $250.00

2 x Turbo Intake and Exhaust housings (External coating only, comp housing high polish silver, exhaust housings black) $160.00

2 x Split Dump pipes (internal and external coating, high polished Silver)

$120.00 per metre

Done by Competition Coating in Guilford.

Cheers,

Johno

I appreciate the reply and i will use it as a guide, jst dont want to get a quote 300% above etc

Specifically i want to get my stock manifolds bored to suit new turbines and ceramic coat them + exhaust housings + dump pipes; can you ceramic coat cast iron though?......well with good or valued results?

thanks

-Johnny

[J'z-R33]

No probs, Im not sure about the coating of cast iron sorry mate. Best to give them a call and see what they say.

Cheers

Johno