O.S. Engine OS-1A301 Competition Engine Set with T2090SC  [OS-1A301]

Compact competition engineering in the O.S. Engine OS-1A301

The O.S. Engine OS-1A301 delivers a compact, precision-built powerplant for competitive car and buggy use. It focuses on predictable throttle response and tunability for race conditions.

Refined carburettor for consistent runs

The OS-1A301 features a revised carburettor that enhances fuel control and efficiency, enabling around ten minutes of running per tank in many race tune scenarios and reducing the need for frequent refills.

Stability gains from the low-profile head

The low-profile cooling head reduces the vehicle center of gravity by 17 mm, improving turn-in and mid-corner composure while still allowing effective heat dissipation during long sessions.

Strong output with a wide usable RPM window

With 3.46cc displacement and 16.40mm bore and stroke, the OS-1A301 reaches a peak 2.61HP at 34,000rpm and operates usefully from 4,000 to 42,000rpm. The engine weighs 347g with the T2090SC muffler, helping to keep the car balanced.

For racers wanting a compact, tuneable engine that balances power and handling, the O.S. Engine OS-1A301 is a practical choice for both on-road and off-road competition models.