|
airdam vs bellypan depends on how bad the underside is and how big the actual bellypan can be...fairing over the entire bottom will obviously beat a small strip underneath the bumper, but can be difficult or impossible to pull off... since the engine compartment is the main problem, fairing over most of the engine bay is a good start, provided everything beyond that is somewhat clean. on the other hand a well designed airdam is also good and can improve over the stock situation. It doesn't make the air disappear however so it'll have to push it somewhere else... a to big an airdam can be a source of drag itself, some of the better airdams are lower in front of the tires and curved to the side to guide the air around the vehicle, and a little higher in the center so they allow the air to go easier under neath (where it would end up anyway)
for inspiration you could look at more modern vehicles and see how low their bumper/airdams go and how they're shaped.
|