tangcla wrote:teK-- wrote:Idea is good but I think it would just be sucking in a lot of hot air.
Irrelevant - when your car is moving, you will be forcing cold air from outside the engine bay to your air filter. The only time you will notice heatsoak is when the car is stationary.
Not irrelevant at all.
The intake sucks air in, and so in and around the filter box is a low pressure region. Some of the cool air going into the engine bay when car is moving, also goes through the radiator. That heated air will then flow to anywhere that is of lower pressure than the front exterior of the car. Some of it will go through the bay and out the back under the firewall, some will go into the exposed air filter box.
By not having an exposed filter you are not creating a low pressure region around the airbox area as it is all enclosed up to the air intake opening under the bonnet.