Racers Place / Engine calculators
Bob Weight Match Calculator
v1.0-beta
Compare the calculated bobweight of your pistons, connecting rods and other components with the value specified for your crankshaft. Use the calculator to compare component packages and support parts selection.
Calculation: 2 × rotating mass + 2 × (reciprocating mass × 0.5).
Crankshaft details
Reciprocating mass (50%)
Rotating mass (100%)
The result shows the difference between bobweight values. It does not specify the amount of material to remove from or add to the crankshaft.