I was curious about this.. I sent the intake manifold to be coated top and bottom but after reading this article

http://www.techlinecoatings.com/arti...ld_Article.htm

It says that you want a thermal barrier on the bottom and a thermal dispersant on the top for the air to cool down faster the intake manifold..

WHat you guys think?

 

where is it coated?

i'm guessing on the bottom, the sides and the runners- while the top is left "virgin?"

edit:

just read the rest of your message.

Yeah i guess it could work. Guys are using it to retain heat in the cylinders by coating chambers, pistons and rings and whatnot...

I dont see it being very big bang for the buck though on an NA motor, even FI.

1% on a 500hp engine = 5hp

 

It states to coat the bottom with a thermal barrier and the top with a thermal dispersant...

My thought after reading the aritcile is that if you coat with a thermal dispersant the top the heat will be trapped.

 

How would a "dispersant" trap heat?
It would make some sense to ceramic coat the mating surfaces where the intake manifold contacts the heads/block because that is where the maniflod gets heated at. The surface area of the exposed surfaces (sides/top) release heat to the atmosphere, and polishing or ceramic coating them will interfere with that heat transfer to some degree.

 

The dispersant coatings are made to aid in the heat rejection.
So the heat barrier coating goes on the underside and a dispersant goes on the top. Makes perfectly good sense and I can attest to it's effectiveness. You can touch my intake manifold after a 30 minute commute. Still "warm" but definitely much cooler than without a coating... I'm sure everyone can attest to having burned themselves on an intake manifold while working on our cars.

BTW, I used Swain



-Mindgame

 

being the smart child i am, i let my car cool off before i touch my intake manifold


but yet i tighten header bolts and change the oil right after i pull into the driveway

 

Yep, the top is coated with a thermal dispersent and the bottom as well as the tray on the bottom is coated on both sides with the barrier. A good friend of mine owns a coating busniess and we exclucivly use TechLine coatings. Like the article says ceramic coatings can not expand with the part. It will chip and peel of due to repeated expansion of the metal. They have performed tests with this (thermal dispersant) coating on brake calipers as well. And it showed a 200 degree drop in part temps. Plus TechLine coatings are specifically designed for high performance automotive applications. All of their products are put through extensive testing. We can coat intakes, valvesprings, valves, combustion chambers, engine bearings, pistons, turbo housings, and the list goes on and on. Significant power gains have been realized with changes in tuning allowed by these coatings. ie. timing, A/F ratios. There are endless possiblites with this stuff. If anyone has any questions feel free to e-mail me at creasyz28@hotmail.com.

PS. I have a stock fully coated intake for sale. The coating would cost 150$ I'll sell the intake for 200$

 

If you were really smart, you would use Stage 8s and not have to tighten them ever.