i read in a thread on here, someones build thread, the k-series w/dual turbo's & he said he was planning on having all the turbo piping ceramic coated & wrapped w/insulation,..and someone made a comment about using the header wrap insulation, saying that he really wouldn't need the insulating wrap if he had his plumbing ceramic coated.
they went on to say that they had a set of headers w/the coating inside & out, and they ran cool enough they could touch the headers while engine is running, i've tried to steer clear of header & use the stock cast iron manifolds, i know they don't perform as well as headers, but i run them to keep the under hood temp as low as possible. so my question is: do the ceramic coat headers really retain the heat inside the header pipes enough that they can be touched while the engine is running? the stock exhaust manifold gets hotter than that, they get so hot you can't touch them.
so, if the ceramic coated headers stay cool enough to touch, they would probally have a cooler under hood temp than the stock manifold?. is this true? i like to keep the temperature in the exhaust gases, the hotter the exhaust stays, the more velocity the exhaust gas maintains, therefor making it flow out the tailpipe faster. at least thats what i was told by either comp cam or lunati's tech line. they said regular painted headers allow the exaust gases to cool and loose its velocity and therefor the exhaust slows down & build heat in the header and raise underhood temp, which causes a hotter air charge into the carb.
i had an red 85 2wd silverado yrs ago, and it was fine for about a yr, then after i put headers on this truck, the heat from the headers faded the paint on my hood. so again, i ask, will the ceramic coated headers retain more heat in the exhaust flow and maintain less under hood temp. than the stock cast iron manifold? i know i want inside & outside coated headers that fit an 85 k10 w/bbc. but am hesitant to order these headers until someone 2nds the opinion of the ceramic coated headers, that they do indeed run cooler than the stock cast iron manifolds...cool enough they can be touched...if they retain heat the way i've been told they do, i plan on getting my exhaust pipe coated also, to keep the heat out of the cab. i plan on buying some s/s tubing to finish out my exhaust, that way i have double the corrosion resistance, w/s/s exhaust and the ceramic coating....i wonder if they will ceramic coat the mufflers?