Ducati's Secret To A Higher Redline — It's Not Desmo!

Summary by Krater

This video explains why Ducati uses a 70-degree crank pin offset in its 90-degree V4 engines by analyzing valvetrain torque and friction power across different firing orders.

From the video

Answers: Why does Ducati use a 70-degree crank pin offset in a 90-degree V4 engine?

• valvetrain torque
• crank pin offset
• firing order
• valvetrain friction
• Desmodromic valves

What it concludes

• Higher amplitude of valvetrain torque oscillation leads to lower reliability, whereas lower amplitude allows for higher RPM and valve lift.
• A 70-degree phase angle between cylinders minimizes both valvetrain torque oscillation and friction loss.
• Zero phase angle firing results in terrible peak power and high interference between exhaust pulses.