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I just had a look under the car in the front-section.
There is absolutely no ducting in front or behind the radiator, the air just spills on and around it and below the car.
Sadly there is no space to make Porsche 996 style air-curtains as the radiator ends about where the wheels start.
There are also some components in the way.
The small vents in the bumper don't actualy do anything and could as well be taped off (or re-purposed for air-curtains)
Possible modifications to the radiator air routing:
-intake duct and smaller intake cross-section
-exit ducting from the fan-shrouds to the wheels
-fully closed flat undertray from the front bumper to the rear end (black ABS plastic untill engine, aluminium sheet metal near the engine and exaust)
Allthough idealy I would design a whole new bumper, the current one has large flat surfaces at the front, wich are less than ideal.
I haven't yet been able to measure pressures there, but a rounder one would certainly be better.
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