I recently made a heatshield for my K&N cone airfilter, to attempt to get cooler air into the intake. I have yet to improve the intake ducting through the wing but today I took some readings of the difference the heatshield made. Although the heatshield did reduce the maximium temperature attained, it also slowed the cooling of the intake air as the speed increased, which I found surprising. Generally, I was 3oF cooler without the heatshield over the same route. Disappointed in the intial results, I will improve the ducting through the inner wing and re-test but at the moment, the shield stays off.
For those interested, here's a pic with the shield in situ:-
and a plot of the results:-
