Turbo Heat Shielding

[Pure_In_Sanity]

Anyone got a pic of this BA XR6 shield installed?
Is it a specific shield for the GT3540 or just universal matting?

[Draven]

vaguely on topic.... how thick is a ceramic coating? I'm assuming that the internal ceramic coating has no effect on the exh wheel?

[thechuckster]

thin and no effect - the mob up in brisbane run by peter henman (competition coatings) recommend it for the interior of the turbine housing.

[Roundy]

Anyone got a pic of this BA XR6 shield installed?
Is it a specific shield for the GT3540 or just universal matting?

what i am using is just universal matting from under the car somewhere, the exhaust dude i use had it lying around, it was the perfect shape for my car too!

[LeeRoy]

I'm a big believer in ceramic coating the exhaust housing of the turbo, and whacking in some XR6-T turbo shield matting to stop the radiated heat cooking your clutch cyl. This is not a cheap option (ceramic coating especially), but it's one I'll be doing.

Not sure on the price of matting but i got my housing coated for $135

- LeeRoy

[Draven]

where at? I was goin to go to competition coating at (auburn?)

[MarioM]

you have to understand the source of heat and methods of heat trandfer, adn also what you are trying to reduce.....

heat comes from the exhaust gas. it then transfers to the exhaust turbine housing (and manifold and dump etc). to reduce that heat transfer, only internal ceramic coating will help.

next, the heat in the turbine housing (and others) is transmitted by two ways, radiated (by infrared raps etc) and conducted (thru the air itself).
again, ceramic coating reduces the rate of heat transfer to the air, and also reduces the surface temperature (reducing radiated heat).

heat wrap or blankets, absorb the radiated heat, and also the conducted heat, so the same heat tries to escape from the turbo, but it doesn't go as quickly.. this results in higher turbine component temps, which could result in early failure.

next is radiation shields (the twin sheet shield type thing) which reduces the transfer of radiated heat to the surrounding objects...



only ceramic coating reduces heat transfer from the exhaust.
both ceramic coating and bags/wrap reduce transfer out of th turbine, but the ceramic (internal also) reduces the temp of the turbine components (comapred to no stuff), whereas bags etc raise the temp.

the amount of heat radiated and conducted result sin higher underbonnet temps...
again, ceramic is best to reduce this...

radiant heat shields are to preotect other things, but will not reduce underbonnet temps so much...

so what your trying to say here is that i would be wasting my time using heat wraps or anything similar to contain the heat of the exhaust housing of the turbo? ceramic coating is probably out of my price range, but if it were a two horse race, would heat sheilds (something like the ba heat sheild that everyone seems to talk about) be better than using turbo bags or the heat wraps?

[IN 05 NT]

anything is beta than nuthing,..........remebering, not using anything does more damage to engine bay components,....wire's, clutch/brake masters, hotter brake fluid, resulting in spongey pedal....

blake

[Pure_In_Sanity]

Seems the XR6 turbo uses ACL heatshielding. Looks like pretty easy stuff to work with.
Info FWIW http://www.aclperformance.com.au/prod_heatshield.htm

[1jzracing]

i have had esome big issues with under bonet temp as a circuit car sitting on redline for 15-20 minuts at a time creats MASSIVE amounts or heat from the turbo and pipes

I found the best was to wrap as much of the pipework as possable with the glass header wrap tape to reduce the amount of heat radiated from the hot components, leave the turbo housing exposed and then add a well designed shield to protect components

i found the best shielding is the factory stuff from things like 1jz's and 1ggt's etc, it has lots of curved bits and it can be cut bent and rivited together, its actually 2 thin layers of steel with some sort of glass type packing between so it doesnt transmit much heat

I put the shielding over the exhaust side of the turbo only (high mount) curling the front lip down as mush as possable between the housings, keep the shield continuos along the dump pipe curling it down the firewall like a big upside down ice cream scoop

this way the movement of air in the engine bay directs the heat emitted from the turbo along the shielding and down under the car, remember any gaps or big holes in the shielding will have red hot air blasting out of it frying everything is sight so its worth getting fussy. i often end up with a few other pieces wired bolted and riveted all over the place to protect stuff and direct as much of the hot air under the car or towards the engine block

its worth doing right, iv had no problems whatsoever with my road car and race car since doing it this way, both have a lot of components in close proximity

[oldcorollas]

so what your trying to say here is that i would be wasting my time using heat wraps or anything similar to contain the heat of the exhaust housing of the turbo? ceramic coating is probably out of my price range, but if it were a two horse race, would heat sheilds (something like the ba heat sheild that everyone seems to talk about) be better than using turbo bags or the heat wraps?

it depends if you want to protect components, or keep heat out of the engine bay, or both.

to protect components, shields are a minimum.
wrap and bags work, but keeps the components hot, and can fail (depending on component types and type of wrap). they should also decrease radiated heat a fair bit (if their surface temp is lower)... but if you can't ceramic coat.. ten i guess wrappign with ceramic is next best thing....
most ideal would be to ceramic coat the inside of turbine and manifolds/dumps to stop heat escaping in the first place..

[celicapain]

anybody know where to get a manifold ceramic coated in melbourne?

[stumpygt4]

at what temp does the ceramic heat coating start to fail? I was looking at getting my dump done, but was also thinking about the inside of the housing and exhaust manifold (165). But the last thing I want is to have it flake off and damage the turbine wheel.