Anyone have a thermal barrier coating applied to their intake?
Who did you use, and how were the results?
Thanks!

Bud Yancer did mine, It is coated inside and out. My motor seems to like a annular booster carb over a down leg, the only reason I can think of is because the intake runs so much cooler it likes the smaller droplets of fuel.

Sounds like it would be great with injection

I didn't do my intake but I did my Combustion Chambers, valve faces and exhaust stems and ports which should (residually) keep the heads and intake temperatures down by passing more heat to the exhaust.

Only did a break-in on it so far, I'll keep you posted once the car is running around.

If the weather is nice this weekend, i'll take some temp readings of the intake, at various points and note them.
This isn't a racecar, so i'm not looking to do this for max performance. it's a street car that gets driven A LOT. so i'm trying to keep under hood temps down, prevent any vaopr lock issues, and have a cooler and better running engine in the summer months.
I was also thinking of using a ram air box type set up, but i'd rather not cut holes in my core support.

Good luck with that. I think you're going to be disappointed with the results. What the barriers keep out they also hold in. Once the manifold gets heat soaked (and it will on a street car!) its going to stay that way much longer. You want to reduce under hood temps, move more air through it.

This is not what I have found with my intake, my intake seems to run so cool that when I ran a down leg booster carb the fuel would puddle in the intake at an idle. I had to switch to a annular booster carb.
david vizard rote an article on this subject a few years ago and seems to have found the same thing. The testing he did was for a nascar team.

Mr. Stanton forgets that when the engine is running, there is a large quantity of cooler outside air rushing through the intake, and usually there are fuel droplets evaporating, and that change of phase requires energy.

The thermal barrier is really just a layer of insulation that reduces heat flow, and heat always flows from hotter to cooler temperature. The barrier on the outside reduces heat flow from the hot oil splashing onto the underside of the intake, and the barrier inside slows the heat that migrates up from the cylinder head face. Barrier on top of the intake slows underhood heat, and some can get quite warm.

If the phase change requires more energy than is conducted by the manifold, the interior temperature will decrease below incoming air temperature.

Edelbrock makes its prototype intake manifolds out of fiberglas. The material has a lower thermal conductivity than aluminum. Because of this, the prototype intakes are always more powerful than the aluminum production intakes. I'd be interested in a ceramic intake. Posed this suggestion to Edelbrock years ago and their response was "We have our own foundry."

Now we have moved into space-age plastics.

R.

What would you port a ceramic intake with ???

Hanged if I know, but as 99% of the intakes that Edelbrock sells are NOT ported, maybe the question itself has little relevance.

Have a nice day,
R.

10 mile drive home from work, engine temp at 200° various points on the intake at 170° to 178°.
Exhaust was al over the place tho, from a low of 495° to about 605°
This weekend, I'll take more readings and note their locations.