Quote:
Originally Posted by E.Roy
I think I want to avoid all the work/issues of paneling the underside of a FULLSIZE VAN by using an air dam to reduce drag.
Whereas you'd want to panel the bottom side and go without an air dam, which could potentially be more effective overall. But I feel the ROI wouldn't be worth it in my case, but I understand you're all in on this stuff.
I propose there's more than 1 area of the vehicle/system to use to extract air from the engine bay, my choice would be not stuffing so much air under, thus keeping pressure low despite some stagnation, and having rear of vehicle/system draw on the engine bay.
I feel it's also possible to increase air speed down sides of vehicle with air dam, which could potentially draw air from engine bay.
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You'll have to be careful on that. While the back of the vehicle is considered an area of low pressure, it's at a higher pressure than the center of the vehicle, with an opportunity that air at the 'back' will actually flow 'backwards' towards the front.
A belly pan and diffuser makes that impossible.