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How Drag Racers Are Running In The Sixes With Manual Transmissions
Jalopnik • • technology
Key Points:
- Professional drag racing with manual transmissions requires advanced skill and precise torque management to handle over 1,000 horsepower without damaging the drivetrain.
- Controlled clutch slip is essential, allowing the clutch to absorb energy and progressively transfer power to the wheels, preventing sudden torque spikes that can harm the transmission.
- Adjustable clutches enable racers to fine-tune the slip rate between the clutch disc and flywheel, improving consistency and reducing strain by gradually increasing clutch pressure with engine RPM.
- Notable achievements include Joel Grannas' MkIV Supra and Jonathan Atkins' 'Grubbworm' Camaro, both using adjustable clutches to break into six-second quarter-mile times.
- Different slipper clutch designs—from manual modulation to adjustable and dedicated slipping devices—all aim to regulate torque delivery for maximum traction and durability, enabling manual cars to compete with automatics in drag racing.
