intake manifold thermal barrier coating...??
#1888228
08/09/15 07:47 PM
08/09/15 07:47 PM
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Spaceman Spiff
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Anyone have a thermal barrier coating applied to their intake? Who did you use, and how were the results? Thanks!
526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!
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Re: intake manifold thermal barrier coating...??
[Re: Spaceman Spiff]
#1889819
08/11/15 09:58 PM
08/11/15 09:58 PM
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Spaceman Spiff
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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.
526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!
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Re: intake manifold thermal barrier coating...??
[Re: Stanton]
#1890744
08/13/15 01:07 AM
08/13/15 01:07 AM
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Joined: Jan 2008
Posts: 795 Glendale Az
Darryls-Demon
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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.
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Re: intake manifold thermal barrier coating...??
[Re: Darryls-Demon]
#1891031
08/13/15 02:49 PM
08/13/15 02:49 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
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I Live Here
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Posts: 16,376
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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.
Last edited by dogdays; 08/13/15 02:51 PM.
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Re: intake manifold thermal barrier coating...??
[Re: Spaceman Spiff]
#1892072
08/14/15 09:43 PM
08/14/15 09:43 PM
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Joined: Nov 2010
Posts: 3,696 jersey
Spaceman Spiff
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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.
526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!
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