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2010 Ford Mustang Shelby-GT500 6 speed manual Gear Ratios Calculator, MPH, Top Speed

 


This calculator outputs the how fast the Ford Mustang Shelby-GT500 can go in each gear as calculated by the gear ratios, engine redline and tire size.
The ultimate top speed may be limted by the power, drag and aerodynamics of each individual car.

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Tire Size
(345/30/20)
/ -
OR
Tire Diameter
(inches)
 
Final Drive Ratio
Redline (RPM)
1st Gear
2nd Gear
3rd Gear
4th Gear
5th Gear
6th Gear
7th Gear
8th Gear

RPM 1st Gear 2nd Gear 3rd Gear 4th Gear 5th Gear 6th Gear 7th Gear 8th Gear
500 3.81 6.35 8.69 11.3 15.27 22.61 0 0
600 4.57 7.62 10.43 13.56 18.33 27.13 0 0
700 5.33 8.89 12.17 15.82 21.38 31.65 0 0
800 6.09 10.16 13.91 18.09 24.44 36.17 0 0
900 6.85 11.43 15.65 20.35 27.49 40.69 0 0
1000 7.61 12.7 17.39 22.61 30.55 45.21 0 0
1100 8.37 13.97 19.13 24.87 33.6 49.74 0 0
1200 9.13 15.24 20.87 27.13 36.66 54.26 0 0
1300 9.9 16.51 22.61 29.39 39.71 58.78 0 0
1400 10.66 17.78 24.35 31.65 42.77 63.3 0 0
1500 11.42 19.05 26.08 33.91 45.82 67.82 0 0
1600 12.18 20.32 27.82 36.17 48.88 72.34 0 0
1700 12.94 21.59 29.56 38.43 51.93 76.86 0 0
1800 13.7 22.86 31.3 40.69 54.99 81.38 0 0
1900 14.46 24.13 33.04 42.95 58.04 85.91 0 0
2000 15.22 25.4 34.78 45.21 61.1 90.43 0 0
2100 15.98 26.67 36.52 47.47 64.15 94.95 0 0
2200 16.75 27.94 38.26 49.74 67.21 99.47 0 0
2300 17.51 29.21 40 52 70.26 103.99 0 0
2400 18.27 30.48 41.74 54.26 73.32 108.51 0 0
2500 19.03 31.75 43.47 56.52 76.37 113.03 0 0
2600 19.79 33.02 45.21 58.78 79.43 117.56 0 0
2700 20.55 34.29 46.95 61.04 82.48 122.08 0 0
2800 21.31 35.56 48.69 63.3 85.54 126.6 0 0
2900 22.07 36.83 50.43 65.56 88.59 131.12 0 0
3000 22.84 38.1 52.17 67.82 91.65 135.64 0 0
3100 23.6 39.37 53.91 70.08 94.7 140.16 0 0
3200 24.36 40.64 55.65 72.34 97.76 144.68 0 0
3300 25.12 41.91 57.39 74.6 100.81 149.21 0 0
3400 25.88 43.18 59.13 76.86 103.87 153.73 0 0
3500 26.64 44.45 60.86 79.12 106.92 158.25 0 0
3600 27.4 45.72 62.6 81.38 109.98 162.77 0 0
3700 28.16 46.99 64.34 83.65 113.03 167.29 0 0
3800 28.92 48.26 66.08 85.91 116.09 171.81 0 0
3900 29.69 49.53 67.82 88.17 119.14 176.33 0 0
4000 30.45 50.8 69.56 90.43 122.2 180.86 0 0
4100 31.21 52.07 71.3 92.69 125.25 185.38 0 0
4200 31.97 53.34 73.04 94.95 128.31 189.9 0 0
4300 32.73 54.61 74.78 97.21 131.36 194.42 0 0
4400 33.49 55.88 76.52 99.47 134.42 198.94 0 0
4500 34.25 57.15 78.25 101.73 137.47 203.46 0 0
4600 35.01 58.42 79.99 103.99 140.53 207.98 0 0
4700 35.78 59.69 81.73 106.25 143.58 212.5 0 0
4800 36.54 60.96 83.47 108.51 146.64 217.03 0 0
4900 37.3 62.23 85.21 110.77 149.69 221.55 0 0
5000 38.06 63.5 86.95 113.03 152.75 226.07 0 0
5100 38.82 64.77 88.69 115.3 155.8 230.59 0 0
5200 39.58 66.04 90.43 117.56 158.86 235.11 0 0
5300 40.34 67.31 92.17 119.82 161.91 239.63 0 0
5400 41.1 68.58 93.91 122.08 164.97 244.15 0 0
5500 41.86 69.85 95.64 124.34 168.02 248.68 0 0
5600 42.63 71.12 97.38 126.6 171.08 253.2 0 0
5700 43.39 72.39 99.12 128.86 174.13 257.72 0 0
5800 44.15 73.66 100.86 131.12 177.19 262.24 0 0
5900 44.91 74.93 102.6 133.38 180.24 266.76 0 0
6000 45.67 76.2 104.34 135.64 183.3 271.28 0 0
6100 46.43 77.47 106.08 137.9 186.35 275.8 0 0
6200 47.19 78.74 107.82 140.16 189.41 280.33 0 0
RPM 1st Gear 2nd Gear 3rd Gear 4th Gear 5th Gear 6th Gear 7th Gear 8th Gear





Some additional information on how these are calculated:

When D is the diameter of the tire, the car moves forward a distance πD with each revolution of the tire. If there are F revolutions per unit of time, it moves forward at a speed of πD´F per unit of time. If D is in inches and F is in revolutions per minute (rpm), the above result will be in inches per minute. There are 63,360 inches in a mile and 60 minutes in an hour, so one inch per minute equals 60/63360 miles per hour or 1/1056 mph. So we have the following formula:

V(mph) = D(in) ´ F(rpm) ´ (π/1056)

In the automotive industry, the coefficient 1056/π is usually taken to be equal to 336 (exactly it is 336.1352398...) and the formula corresponding to the above is:

(mph)(gear ratio)(336) = (tire diameter in inches)(rpm)

With the above numerical approximation, both formulas are identical if we consider that (rpm)/(gear ratio) is the rate of rotation of the tires. So the "gear ratio" as the number of rotations of the driveshaft for each turn of the tire. This ratio is normally more than 1, except in overdrive gear. So, calling R the "gear ratio", your final answer is:

V(mph) = D(in) ´ F(rpm) ´ (π/1056) / R

or, approximately: V = (D ´ F) / (336 ´ R)

where V is the velocity (in mph), D the tire diameter (in inches), F the engine rpm, and R the gear ratio.

 


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