O.S. Engine OS-1A301 Compact Race Engine with T2090SC  [OS-1A301]

O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler
Price:
AUD$980.57
Brand:
O.S. Engine
Model:
OS-1A301
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alt="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler" title="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler"
alt="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler" title="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler"
alt="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler" title="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler"
alt="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler" title="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler"
alt="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler" title="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler"
alt="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler" title="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler"
alt="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler" title="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler"
alt="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler" title="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler"
alt="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler" title="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler"
alt="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler" title="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler"
alt="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler" title="O.S Engine 1A301 - Speed B2102 Combo Set with T2090SC Muffler"

Built for race control the O.S. Engine OS-1A301

The O.S. Engine OS-1A301 is aimed at racers who prioritise chassis balance and consistent performance. Its compact layout and tuning range make it suitable for a variety of competition vehicles.

Fuel efficiency via a redesigned carburettor

A new carburettor improves fuel consumption and metering on the OS-1A301, enabling roughly ten minutes of running per fill under normal race setups, reducing downtime between heats.

Handling benefits from a low-profile cooling head

By lowering the center of gravity by 17 mm, the low-profile cooling head helps the vehicle turn cleaner and stay stable mid-corner, while preserving the engine's cooling ability over long runs.

High revs and controlled weight

The OS-1A301's 3.46cc displacement with a 16.40mm bore and stroke gives a maximum of 2.61HP at 34,000rpm and a usable range from 4,000 to 42,000rpm. At 347g with the T2090SC muffler it keeps mass low for better handling.

Specifications

  • Displacement: 3.46cc
  • Bore: 16.40mm
  • Stroke: 16.40mm
  • Practical RPM: 4,000 - 42,000
  • Max Power: 2.61HP @ 34,000rpm
  • Weight: 347g (with T2090SC Muffler)

The O.S. Engine OS-1A301 offers a compact, tunable power solution focused on handling and efficient running, making it a strong choice for track-focused builders.

What gearing should I start with?

Begin with your usual gearing for a 3.5cc class engine and adjust based on track straights and lap times. The OS-1A301 responds well to small changes.

Does the muffler included affect power delivery?

The T2090SC muffler is matched to the engine and provides a balance of backpressure and noise control while keeping power delivery smooth.

How often should I check the engine after running?

Inspect head temperature, glow plug condition, and needle settings after the first few runs. Regular checks help catch any tuning drift before race day.

Is this engine suitable for club racing classes?

Yes, its displacement and power curve fit many club classes for buggies and touring cars, though always confirm with local regulations.

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