O.S. Engine OS-1A400 Track-Tuned 1/10 200mm Engine  [OS-1A400]

O.S. Engine OS-1A400 - O.S Speed T1201 1/10 On Road Touring Car Engine
Price:
NZD$674.21
Brand:
O.S. Engine
Model:
OS-1A400
Condition:
Brand New
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O.S. Engine OS-1A400 Brief for Club and Championship Racing

The O.S. Engine OS-1A400 is developed for 1/10th scale 200mm race cars and follows the Speed 12XZ Spec.III heritage. It targets improved fuel efficiency and broader torque delivery to help drivers manage long runs and changing track conditions.

Performance-Oriented Long-Stroke Setup

The long-stroke architecture on the OS-1A400 widens the usable rev band and improves driveability. A precision carburetor gives finer mixture control for predictable throttle reactions, while the lower centre of gravity cooling head supports steadier handling at higher corner speeds.

Build Notes and Key Figures

Specifications

  • Stroke Volume: 2.10cc
  • Output: 1.75ps / 35,000 RPM
  • Bore: 13.67mm
  • Stroke: 14.3mm
  • Practical RPM Range: 5,000 ~ 45,000 RPM
  • Weight: 223g

Whether for club weekends or series racing, the OS-1A400 offers a balanced mix of efficiency and torque for competitive 1/10th touring applications.

How do I tune the engine for varying track temperatures?

Adjust the high and low needles incrementally as track temperature changes, checking for crisp throttle response and stable idle before race runs.

Is the cooling head changeable for different setups?

The low centre of gravity cooling head is designed for improved balance, but compatible aftermarket heads may be used if they match mounting and cooling needs.

Will this engine suit sprint and endurance formats?

Yes, the engine's fuel efficiency and broad torque make it suitable for both sprint events and longer mains, given proper fuel and tuning strategy.

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