OS1CC00

OS SPEED R21GT

Product info:

This is the O.S. Speed R21GT engine for the 1/8th GT on-road classes. Designed with the forthcoming 1/8th GT IFMAR World Championship in mind, the engine builds on the proven R2101 crankcase which was refined as was the 5+3 ports liner and piston to meet current IFMAR rules. The newly designed crankcase features a DLC coating for wear while the updated cooling head design ensures optimised heat dissipation under the large GT body shells. The engine is rounded out by the newly designed 22E (B) GT carburettor and it comes with a 7mm venturi insert, again to meet IFMAR requirements.

 

Tech specifications:

Displacement: 3.49 cc

Bore: 16.08mm

Stroke: 17.20mm

Intake ports: 5-port

Exhaust port: 3-port

Practical RPM range: 4,000 – 42,000 rpm

Max. power output: 2.65 ps / 2.61 hp / 34,000 rpm

Weight: 369Gr.

 
More info

This is the O.S. Speed R21GT engine for the 1/8th GT on-road classes. Designed with the forthcoming 1/8th GT IFMAR World Championship in mind, the engine builds on the proven R2101 crankcase which was refined as was the 5+3 ports liner and piston to meet current IFMAR rules. The newly designed crankcase features a DLC coating for wear while the updated cooling head design ensures optimised heat dissipation under the large GT body shells. The engine is rounded out by the newly designed 22E (B) GT carburettor and it comes with a 7mm venturi insert, again to meet IFMAR requirements.

 

Tech specifications:

Displacement: 3.49 cc

Bore: 16.08mm

Stroke: 17.20mm

Intake ports: 5-port

Exhaust port: 3-port

Practical RPM range: 4,000 – 42,000 rpm

Max. power output: 2.65 ps / 2.61 hp / 34,000 rpm

Weight: 369Gr.

 
Data sheet
ModelOn Road
Engine or ComboEngine
2 stroke or 4 stroke2 stroke

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