easy to do the calculations on line about potential top speed. you can determine the ratio by just jacking it up and spinning the tire and counting the rotations. You also need tire size for the calculators. But the issue is really how much power it takes. drag goes up as the square to the speed. it becomes a monster at high speeds, the vast majority of your Horsepower is used up pushing air out of the way! In the land speed world the saying is that it takes 7X as much power to make 2X the speed. ie if you can make 100 mph with 100 horsepower, you would need 700 HP in the same car to reach 200 mph. You can actually run the car through a calculator if you know CD and frontal area. Frontal area pretty easy to guestimate, measure up the side, then across the width, think of it like if the car punched through a wall in a cartoon. The shape the car leaves, thats the frontal area.
you can go over to Seldom Seen Slims website - landspeed . com for calculators and alot of guys who know this stuff cold!
anyway with frontal area and coefficent of drag you can easily calculate how much horsepower you need to reach any specific speed. i can tell you that most guys way overestimate their cars top speed, and some of em even lie about it - make stuff up. I doubt the 180 speed given here, unless the guy is putting out about 550 hp at the wheels
