RPM Drop Calculator

Inputs

Shift RPM (n_1)

Engine speed before the shift.

rpm

Current gear ratio (G_1)

Gear ratio before the shift.

Next gear ratio (G_2)

Gear ratio after the shift.

Minimum useful RPM (n_min)

Lowest RPM you want to land above after the shift.

rpm

Results

Default result

After-shift RPM(n_2)

4,488rpm

Out of tol.

Also computed

RPM drop2,012rpm

Drop31.0%

Power-band marginOut of tol.−12rpm

Method notes 2 notes

The ratio method assumes road speed is unchanged during the shift.
Use dyno data or logged acceleration to choose the actual shift point; this page only checks gear spacing.

Powered by MachineCalcs ↗