I think some of you guys are missing the point. Any physical barrier that has a high heat shielding capacity will be beneficial whichever way you look at it. After all that area is a massive hotspot and as we all know aluminum will absorb that radiant heat of those turbo's quick smart. I have a similar think on my car except it is stick on. I have someone that has actually logs tests on how heat resistant it is and it easily retains up to 600 degrees C. Mind u this was also performed with a high grade thermocouple and blow torch to obviously produce the temps required.

I was the one who posted for some before and after data. But don't interpret that as me thinking this has no benefit. It likely does. But how much?

I'm not a physics major. But as I understand it, intake air temps will be raised primarily by three factors in relation to their contact with the manifold...(A) the temperature differential between the air and interior manifold surface. That differential should be reduced by the heatshield. (B) the amount of surface contact between the air and manifold which will be constant. And (C ) the time of contact (air to manifold surface), which varies but in any event be unaffected by the heatshield.

That's why I asked about data.

Your shield as much as I would like to see it work, will not. Your intake charge temps will be the same. The heat is still there. You have to give it a place to go. Some sort of vent to a vented hood may be an idea, but at the end of the day a vented hood will do the same job. Just my .02

My personal experience says otherwise. However I have added an extra bung to one of the primary runners on a lower intake manifold and will be datalogging hopefully by the end of week. I will let you guys know how it goes..

For the past week I have been testing the heat-shields. I have installed a GM style air temp sensor on the backside of rotor # 2's primary runner, right before it enters the motor. The testing has been somewhat frustrating. Its very hard to keep a control on the tests. It is very interesting to see how much the intake temperature changes in this position. A lot of things affect it, the biggest one is air-speed/throttle position. This really needs to be done on an engine dyno. The shields do indeed help, but its anywhere from 2-10C depending on conditions. One thing I forgot to do with the test manifold was plug the water passage for the turbo feed( 2nd gen). This heatsoaks the manifold considerably, that or just being attached to the engine is doing it. When you come a stop it creeps up. One big factor is your mph, it appears there is decent enough wind current to help bring the heat out of the engine bay at 100+mph( car has stock hood). I may try a easier test of just using a thermal coupler behind and infront of the shield for fun...



Test vehicle below; 20psi on a To4E 57 trim...

37C day, cruising intake temps are 40-48C in town, 39ish at highway speeds

25C in boost, but reaching 39C if doing 40-150mph pulls.