The simplest way to look at it:
Rounded surface creates lower pressure. Look at an air foil, the top surface creates lift by lowering the pressure. Overall shape of the car is rounded, thus creates lower pressure on that surface (varying levels). Low pressure on the top half of the car is lift.
Flip a car upside down and you get down force right?
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1973 Fiat 124 Special
1975 Honda Civic CVCC 4spd
1981 Kawasaki KZ750E
1981 Kawasaki KZ650 CSR
1983 Kawasaki KZ1100-A3
1986 Nissan 300zx Turbo 5 spd
1995 Chevy Astro RWD (current project)
1995 Mercury Tracer
2017 Kawasaki VersysX 300
2022 Corolla Hatchback 6MT
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