[Tru2Chevy]

Originally Posted by JL8Jeff

Why would it be counterproductive? Coating keeps the high temps out of the engine compartment and helps pull more exhaust/heat out of the engine. The headers might stay hotter longer after shutdown, but while running the coating is always a plus. It's not necessarily to protect the metal but probably not worth the cost to do on stainless headers.

Seems we had this discussions back in '06 Jeff: http://www.njfboa.org/forums/showthr...inless+coating

Originally Posted by foff667

Coating Stainless Steel headers is pointless imho & I always thought SS was actually far better at keeping underhood temps down in comparison then mild steel coated headers.

Originally Posted by Tru2Chevy

How does normal stainless steel act as a heat barrier?

- Justin

Originally Posted by foff667

http://www.burnsstainless.com/TechAr...s_article.html

"Typical 1010 carbon (mild) steel conducts 219% more heat per foot than do the types of stainless steel we use in header fabrication. By contrast, quite a bit more heat stays inside the stainless header tubes and does not get passed into the surrounding air. By not allowing the contraction of the cooling gases as they flow down the tubes, more exhaust velocity is retained which promotes better scavenging at the collector. This retention of velocity increases the overall header efficiency."

http://performanceweldingheaders.com/svsm.htm

"It is believed that due to Stainless Steel Thermal characteristics, the high exhaust temperature is retained inside the primary tubes and can increase the exhaust speed in the header, which in a Competition Racing Header sometimes is an important goal. Due to the simple fact that there is no rust generated, the inside of each primary tube will stay smooth and flow accordingly"

http://www.quicktimeperformance.com/Headers/

"Stainless steel performs this function without the need for add-ons because it has a much lower coefficient of thermal conductivity, thereby keeping more heat inside and transmitting it to the header outlet. Radiated heat is perhaps the most important reason to wrap or ceramic coat the headers to protect the car and the driver from excessive, fatiguing high temperatures"

(Sorry for the hijack Mike)

- Justin