Mark A Shields

I realize the benefits of Jet-Hot coating on headers, but what about an intake, only benefit I can see is better looking, and I would assume more HP, keeping the under hood temps down...

Anyone have any experience with whether it would warrant the price, I mean they want like $270 for headers.

BTW, I'd get their new Sterling coating.

Mike1

iTrader: (2)

Yeah, I've been wondering the samething. Who's got some ideas about this?

Nixon1

Hmm... This is all strictly my theories... Well, I mean, it'd keep the external temps down around the engine, but the engine's internal temperatures would remain the same..Sort of like baking a potato and covering it in foil. The foil isn't gonna be as hot, but you take it off and the potato will still burn the living sh*t out of the roof of your mouth! The only way I see it making horsepower is by making the air pulled through the intake slightly cooler because the air taken in is just air drifting around the engine bay. Doubt it'd help the FI people in those circumstances unless they're running some sort of funny short ram deal, but the radiator would kill off a lot of the benefits of the coating.... but the carbed guys might see something out of it..?

BTW, can someone explain to me the benefits of the coating on headers? Besides decreasing the temperatures around the engine bay by quite a bit and preserving other parts that way...I don't see what else it could do. I can't imagine it would make much of a difference on the exhaust end... If it's cooling the exhaust on exit, sure it'll make it more dense, but it'll also slow it down cause hot gases move quicker than colder ones..

Beast5spdGTA

Nixon, the coatings that reduce header temp. do it by limiting the heat transfer from exhaust gas to the header material, therefore they(coating) keep the under hood temp down as well as keep the exhaust temp up. They also keep plug wires from getting burned up(trust me this is good), coating cost ~$200-300, new wires/boots(fire sleeve) ~$80 so far(18 months) and a few have burnt again. Needless to say my next headers will be coated for the temp reason, I don't care about the look nearly as much.

Mark A Shields

They also help protect against corrosion, and inside coating, helps smooth the surface helping gases flow easier.

gruveb

I agree with Nixon. Having a lot of experience with air cooled engines I know that having a painted surface (or coated in this case) definitely keeps the heat inside! On air cooled engines (Where a large portion of the engine's heat is transferred through the surface area of the engine and the rest through oil coolers) to add paint of any kind other than flat black is nearly a death sentence!


Since we're water cooled ( Thank G od) we can get away with having pretty looking engine blocks and chrome oil pans if we so chose. However, living where I live - it's HOT - I would much prefer a flat black oil pan (if paint is there this is the best kind) and a clean block.

I don't really see how coating your intake would do that much of anything other than make it look nice.

After all it takes a certain amount of power to cool the engine down!

KevinP92Z

You'd have to make sure your gounding path for any sensors mounted in the manifold is still valid. One set of headers I have coated are non-conductive, while the other sit is. Guess it depends on the Al content of the ceramic substrate the different companies use.

As long as you have the sensor threads masked off when coating you should be ok. You may also need to make a claer grounding path for the mainifold to vehicle ground with a grounding strap if the ground through bolts into the heads doesn't provide a good enough path.