Drag Racing Gear Ratio Calculator
Drag Racing Gear Ratio Calculator . The middle/idle gear doesn't have to be taken into account in. We calculate the gear ratio between two gears by dividing the circumference of the input gear. calculate gear ratios, and when to shift calcs Grumpys Performance Garage from garage.grumpysperformance.com To calculate the drag forces (fd) you need your racing cars: Read off your mph at any rpm in any gear. This calculator is for entertainment value only.