correct me if I am wrong, but regardless of what you do to the tube, on your SRIs, you're still sucking in hot air and it's velocity at which it's taken in to the intake manifold and engine really wouldn't give it enough time to cool down.
Might I add a little something you neglected to consider. Considering that HEAT and thermal paints are designed to keep heat out, they're also designed to keep HEAT in! If you heat treat a BBQ, are you trying to keep heat out? No, you're trying to keep the heat in the BBQ, same with refridges, stoves, ovens, etc. It makes the temps inside stay at what they are. So, by using heat paint on an SRI (not CAI) you're essentially sucking in HOT air from the engine compartment, and keeping it hot. Really, it doesn't matter with SRIs because either way the temps are going to be hot with or without the paint.
CAIs are a different story. You're pulling in colder air, and that tube needs to be heat treated to keep it as cool as possible while it passes through the hot air in the engine compartment.
This was still a kewl write up on how to paint your intake. :btu
good examples, its like painting your valve cover its jsut to make your engine bay claener lookingThere is no scientific research on it, however, thermal treating items is designed to keep temps out and IN.
Heat treating a header keeps the heat in, think of insulation wrapping around your headers and even TURBO manifolds. Heat wrapping a turbo manifold is to keep the heat IN the manifold, and NOT the engine bay.
Heat treating an intake tube will keep temps exactly the same as what it sucks in. If you put heat resistant paint on a SRI, you're still sucking in HOT air, the same TEMP air that would heat your tube, therefore if you're pulling in air that is 150 degrees ambient in your filter, the tube get no hotter than that unless it's physically touching the heat source. This is regardless of the heat resistant paint on the tube. You're still sucking in the air.
The reason it doesn't work like people think it does is because the tube on an SRI is so short, the amount of volume being sucked through the intake is so fast it wouldn't have time to take any effect on the air itself.
MATH AND SCIENCE CONTENT:
Stock airbox flows at 237 CFM (Cubic Feet per MINUTE)
Injen Intake is rated at 351.4 CFM
In either case, those speeds are so fast it makes no difference. Here is why.... That injen intake moves 351 CFM, that means it would suck the air out of a 7ft x 7ft x 7ft (343 CUBIC FEET) room in less than 1 minute and imagine your engine bay being 3ft x 3ft x 2ft (18 CUBIC FEET). That means that in 1 minute, that engine bay would be cleared of it's entire air capicty 19.5 times over in a minute using that 351CFM intake, thus rendering the spray paint useless in terms of cooling an intake tube.