RPM
Enter Ratio, Tire Height, and Speed (mph) then click Solve to calculate RPM
Transmission Ratio RPM
Enter R&P Ratio, Tire Height, Speed (mph), and Transmission Ratio, then click Solve to calculate RPM
|
| Recommended Towing RPM |
| 4 cl |
2200-3200 |
| 6 cl |
2000-3000 |
| Big Block |
1600-2600 |
| Small Block |
1800-2800 |
| Ford 6.0L |
1900-2400 |
| Ford Diesel (Non-Turbo) |
1600-2500 |
| Ford Diesel (Turbo) |
1400-2200 |
| Dodge Diesel |
1400-2200 |
| GM Diesel 6.2L |
1800-2800 |
| GM Duramax Diesel |
1800-2400 |
Transmission Gear Ratio Chart
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| |
| |
1st |
2nd |
3rd |
4th |
5th |
6th |
| Powerglide (sm. blk) |
1.76 |
1.00 |
|
|
|
|
| Powerglide (big blk) |
1.82 |
1.00 |
|
|
|
|
| Turbo 350 |
2.52 |
1.52 |
1.00 |
|
|
|
| Turbo 400 |
2.48 |
1.48 |
1.00 |
|
|
|
| Turbo 700R-4 |
3.06 |
1.63 |
1.00 |
0.70 |
|
|
| M20 (1963-65) |
2.56 |
1.91 |
1.48 |
1.00 |
|
|
| M20 (1966-74) |
2.52 |
1.88 |
1.46 |
1.00 |
|
|
| M21/M22 |
2.20 |
1.64 |
1.27 |
1.00 |
|
|
| Super T10 (S-code) |
2.43 |
1.61 |
1.23 |
1.00 |
|
|
| Super T10 (W-code) |
2.64 |
1.75 |
1.34 |
1.00 |
|
|
| Super T10 (P-code) |
2.43 |
1.76 |
1.47 |
1.00 |
|
|
| Super T10 (U-code) |
2.88 |
1.91 |
1.33 |
1.00 |
|
|
| Richmond 4+1 |
3.27 |
2.13 |
1.57 |
1.23 |
1.00 |
|
| Richmond 6-speed (a) |
3.27 |
2.13 |
1.57 |
1.23 |
1.00 |
0.78 |
| Richmond 6-speed (b) |
3.01 |
1.88 |
1.46 |
1.19 |
1.00 |
0.62 |
| Borg Warner T56 |
2.66 |
1.78 |
1.30 |
1.00 |
0.74 |
0.50 |
| Borg Warner T56 |
3.36 |
2.07 |
1.35 |
1.00 |
0.84 |
0.62 |
| Borg Warner T56 |
2.97 |
1.94 |
1.35 |
1.00 |
0.84 |
0.62 |
| Borg Warner T56 |
2.97 |
2.07 |
1.43 |
1.00 |
0.80 |
0.62 |
| ZF 6-speed |
2.68 |
1.80 |
1.29 |
1.00 |
0.75 |
0.50 |
| Toploader (close ratio) |
2.32 |
1.69 |
1.29 |
1.00 |
|
|
| Toploader (wide ratio) |
2.78 |
1.93 |
1.36 |
1.00 |
|
|
| Toploader (overdrive) |
3.29 |
1.84 |
1.00 |
0.80 |
|
|
| 200-4R |
2.74 |
1.57 |
1.00 |
0.67 |
|
|
| 4L60E |
3.06 |
1.63 |
1.00 |
0.70 |
|
|
| 4L80E |
2.48 |
1.48 |
1.00 |
0.75 |
|
|
| Tremec 3550 |
3.27 |
1.98 |
1.34 |
1.00 |
0.68 |
|
| T-5 (F-body) V8, 83-87 |
2.95 |
1.94 |
1.34 |
1.00 |
0.74 |
|
| T-5 (F-body) V8, 88-92 |
2.95 |
1.94 |
1.34 |
1.00 |
0.73 |
|
| T-5 (F-body) 83-87 |
3.35 |
1.99 |
1.33 |
1.00 |
0.68 |
|
| T-5 (F-body) 88-92 |
3.97 |
2.34 |
1.46 |
1.00 |
0.79 |
|
| Saginaw 3 speed (all) |
2.54 |
1.88 |
1.00 |
|
|
|
| Saginaw 4 speed (all) |
2.20 |
1.64 |
1.47 |
1.00 |
|
|
|
Tire Height
Enter Tire Width , Aspect and Wheel, then click "Solve" to calculate Tire Height.
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Street tires are rated using three numbers for example 225/70R15 or 255/70/15. In our example 225 is the Width in mm if the tire was measured from the bottom of bead to bottom of bead. In our example 70 is the Aspect, which means that the sidewall is 70% as tall as the tread is wide. In our example 15 is the the Wheel, the size of the wheel in inches, also called rim size. Placing the example numbers in the corresponding fields you will get a Tire Height of 27.4. Place your corresponding numbers into the fields below to calculate your tire height.
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