OS Engines Speed R2104 .21 Nitro On Road Engine, No Longer Available
O.S. SPEED R2104 is a factory-tuned engine solely developed for 1/8 racing competition. The new engine boasts 9-port piston liner to improve torque in the low-middle power range. It produces enough power as designed even in high traction tracks. The redesigned crankshaft counterweight enables smooth power transition from low to top. The distance of each fin of the heat sink head is enhanced for better airflow for cooling and better balance.
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Features
- 9-port piston liner to improve torque in the low-middle power range. It produces enough power as designed even in high traction tracks
- The distance between the cooling fins is enhanced for better airflow and better balance
- The heat sink head is anodized in two colours; black and red
- A silicone O-ring fit to the inner head prevents dust from coming into the engine
- The redesigned crankshaft counterweight enables smooth power transition from low to top
- The carburettor is 21M2(B), which has been proved to be consistent and reliable for generations (R2101, 2102, 2103)
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Product Information
O.S. SPEED R2104 is a factory-tuned engine solely developed for 1/8 racing competition. The new engine boasts 9-port piston liner to improve torque in the low-middle power range. It produces enough power as designed even in high traction tracks. The redesigned crankshaft counterweight enables smooth power transition from low to top. The distance of each fin of the heat sink head is enhanced for better airflow for cooling and better balance.
Specs
- Bore:
- 16.08mm (0.633" )
- Carb Type:
- Slide valve
- Crankshaft Threads:
- UNF 1/4-28
- Crankshaft Type:
- Threaded
- Cylinder Type:
- Nine port liner
- Cylinders:
- Single
- Displacement:
- 3.49 cc (0.213 cu in)
- Engine (Only) Weight:
- 340g (11.99oz)
- HP:
- 2.8 ps / 2.76 hp at 35,000 RPM
- Height:
- 91.2mm (3.6"), total height
- Length:
- 94mm (3.7") backplate to of crankshaft
- Plug Type:
- OS RP7 turbo, cold heat range
- RPM Range:
- 4,000 - 45,000
- Recommended Fuel:
- 10 - 30% nitro content, 20% recommended for break-in
- Starter Type:
- Bump
- Stroke:
- 17.20mm (0.677" )
- Type:
- 1/8 scale buggy engine
- Width:
- 45mm (1.8") at mounting tabs
Product Manuals
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