Hi. I am hoping for some advice on airflow...in particular, guaranteeing airflow to a rear mounted radiator, in my 2.5 Triumph Spitfire. I have read, about low pressure, and high pressure areas, although im a little confused as to the area underneath the car. I understand that the lower a car is to the ground, the more the car "sucks" itself down....Bernoulli affect? The Triumph Spitfire has a low pressure area at rear, which , can pass exhaust gases,back into the car. I have heavily modified my car bodywork, in as much as i have nearly fabricated a new roof,(Am currently at "plug" stage). This roof has three vents, which will guide air to a rear mounted radiator.In addition, i flowed the roof back, similar to fastback design, which in that case allowed the car to gain 7mph top end speed. Now im looking to enhance the overall flow, to rear radiator, by using the under car air. The rear radiator will be mounted in the boot area, and angled, with two cooling fans. I was thinking, that i could use a panel, gathering air from beneath the car, and directing it at radiator. I have some photos on my blog, if these will help, http://ukcjmspitfire.blogspot.com/ Any advice, comments, or observations greatly appreciated.