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Old June 9th, 2008, 09:13 AM   #1
Plato2k5
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Default ceramic coated headers...

do they actually lower coolant temp levels?? Or just the underhood temp???

Also for those that run or have ran them, whats the temp difference you have noticed?
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Old June 9th, 2008, 09:15 AM   #2
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i have heard they lower underhood temps quite alot.
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Old June 9th, 2008, 09:22 AM   #3
Flexin' XJ
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I have one but don't notice a difference. I also don't have a temp guage under the hood.
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Old June 9th, 2008, 09:37 AM   #4
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my headders arent coated and i dont have any high temp issues it runs the same tep. that it would run if it was stock
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Old June 9th, 2008, 09:47 AM   #5
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Quote:
Originally Posted by Plato2k5 View Post
do they actually lower coolant temp levels?? Or just the underhood temp???

Also for those that run or have ran them, whats the temp difference you have noticed?
The concept is to evacuate heat from the engine more efficiently/faster. They also provide corrosion resistance to the pipes themselves.

If properly coated inside and out, the inner refractory coating resists absorbing exhaust heat and reflects it away from the header interior surface and out of the pipe. This results in a highter exhaust temp at the end of the system, but that's all heat that would have otherwise been soaked up by the motor and header.

The outer coating works in the opposite manner, pulling heat out of the pipe and giving it off faster. This would make you think that it would always raise the underhood temperatures, but the combined effect of the system lowers them overall since the inner refractory coating is pretty effective and the air moving over the exterior of the pipe is taking more heat with it since the heat that does get transferred into the header's metal is coming out faster.

I've always felt that the added bonus of the corrosion protection makes coated headers worth it. Vehicles that already had adequate cooling systems to begin with will probably not demonstrate much of a difference, but it will still be happening. However, a well-ventilated engine compartment reduces the need for things like this. A louvered hood would probably eliminate the problem completely. All you need in order to perform the comparison is an overn thermometer to sit at the top of the engine before and after.
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Old June 9th, 2008, 04:10 PM   #6
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Plato,

I have had both, and the only difference I see is: coated headers look better because they don't rust as bad, but they are like double the price.

Uncoated, will be all rust color in a matter of days.

I went with uncoated. Paint them with high temp paint, they will look fine.
(and mine are fenderwell)

My $.02
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Old June 9th, 2008, 06:47 PM   #7
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in my racing days I have done both... wrapped headers and coated heaters.... the wrapping works.... OK..... but in an ORV they can get covered in mud and stink over time, plus degrade....

the ceramic wasn't cheap, but it looked a LOT better and preformed well. We never ran bare, it was either wrapped or coated so I don't really have a compairison bare to coated.... but IIRC the coating was better then the wrapping, but not substantially... There was a guy that lived in Waterford that ran a shop in Detroit who coated them for us... Don't know if he still does, or if Eric Fulton at Prism does ceramic or not......
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