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the reason why certain bodies seem to preform better is the weight and aerodynamics. if u had a a high riding bulky truck body on ur car u would experiece poor prefomance due to a high center of gravity and drag. a lower body with a sleek aerodynamic shape that would cut through the air would experience less roll due to a lower center of gravity, better accel and speed due to less drag, and improved handeling and tire placment to the ground due to the greater down force on the car. the ideal most effiecent body would have a low to the ground froont wedge shaped bumper that would increase slightly as it moves bac over the rest of the car staying as flat as possible. this would experience less drag and a good amount of air would go over the top of the car pushing down on the wheels for grip instead of having air going underneath making the car lift off the gound as it sped up inceasing roll. y do u think high prefomance cars, stock cars, indy, dragsters, are so low to the ground with very sleek bodies. le mans race cars are a perfect example of this.
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