Performance … At This Point all Theoretical

With the specified equipment on the Build Specification page, I used several online sources to come up with estimated performance for the vehicle:

Tire Size Input Gear Ratios
Width 315 mm. 1st 3.270
Profile 35 % 2nd 1.980
Rim Size 17 in. 3rd 1.340
Slicks in. 4th 1.000
5th 0.680
Calculated Tire Size 6th
Diameter 25.681 in.
Rollout 80.680 in. FD 3.270
Revs/mile 785
RPM at Cruising Speed
MPH 1st 2nd 3rd 4th 5th 6th
70 9797 5932 4015 2996 2037 N/A
MPH at Engine Speed (Shift Points)
RPM 1st 2nd 3rd 4th 5th 6th
6,000 42.87 70.80 104.62 140.19 206.16 N/A
RPM Drop N/A 3633 4061 4478 4080 N/A


  1. The speed shown in first gear on the RPM at Cruising Speed Chart would be limited by the 6000 RPM red line.
  2. The top speed shown on the MPH at Engine Speed table is theoretical only being simply based on the ratios. Actual top speed is governed by other factors as well such as peak horsepower, aerodynamics, handling characteristics, tire conditions and other environmental factors (humidity, temperature, etc).
  3. From what I have seen online the max horsepower is developed around 5500 based on torque/hp curves online (which are only a rough approximation of the actual engine performance) and does not include drive train power losses, etc. I am guessing that by the time you take all into account top speed would be in the 140-150 MPH range.

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