Fuel Energy Flow Below 10500rpm

In Simple Terms

F1 engines must limit how much fuel energy they use at lower engine speeds (below 10,500 rpm). The rule uses a formula to calculate the maximum allowed energy flow: teams can use more energy as the engine spins faster, but they're strictly limited to prevent excessive power at lower rpms.

• Applies only when engine speed is below 10,500 rpm
• Energy flow limit increases with engine rpm using the formula: 0.27 × rpm + 165 MJ/h
• At 10,500 rpm, the limit reaches approximately 2,997 MJ/h
• Ensures fair competition and controls engine performance in the low-rpm range