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 Thermal Barrier Coating on Intake Manifold 
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Joined: Wed Dec 18, 2013 2:23 pm
Posts: 102
Anyone here have experience with TBC on intakes? I did a parts swap with someone and picked up an intake like I've tested in the past, only this one was apparently coated by Jet Hot. If I do the same type of plenum and runner mods that helped before, the internal coating will be ground away, but the external coating will remain.


Sun Aug 28, 2016 10:49 pm
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Joined: Sun Jun 23, 2013 1:41 pm
Posts: 366
Location: Phila. Penn.
My one experience with Jet-hot was years ago on headers, LA - A-body Headers by ed to be specific. Not impressed.
Before I went with custom stainless headers I was looking into TBCs. I think they do work in certain situations but there is a lot of smoke and mirrors.

A polymer barrier is going to be very thin and probably of little insulating value in terms of conduction. It could change the radiated thermal energy transfer and possibly the convection. One thing it definately can change is the conduction on contact. In other words if an object, say your skin, touched a piece of wood at 300 F it would not burn quite as quick as touching a piece of copper at 300 F. On the bottom of an intake manifold, perhaps this would reduce hot spots form oil splash and therefore the overall temperature of the casting.

A ceramic barrier probably has some insulating value in conduction. By ceramic I mean something like porcelain or zirconium dioxide coating. I do not mean ceramic material in a polymer binder. Relatively expensive process to apply.

More detailed findings on Properties of Thermal Barrier Coatings for Exhausts. Still looking for more light to burn away the marketeering fogs


Sun Sep 11, 2016 5:31 pm
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