O.S. Engine OS-13641 21VG-X (P) .21 VG-P Sport Racing Engine  [OS-13641]

O.S. Engine 21VG-X (P)
Price:
CAD$293.38
Brand:
O.S. Engine
Model:
OS-13641
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Track-Tested O.S. Engine 21VG-X (P) for 1/8 Scale Racers

The O.S. Engine 21VG-X (P) is built for competitive 1/8 scale racers seeking robust, tunable performance. This .21 VG-P unit balances durability with responsive power delivery for club and track use.

Advanced Bi-Metallic Cylinder Design

The 21VG-X (P) uses a bi-metallic liner process to improve the bond between the sleeve and base metal. That tighter fit between piston and sleeve helps maintain stable compression and extends the service life of the engine under race conditions.

Slide Valve Carburetor for Sharp Throttle Control

Equipped with a two-needle 21F slide valve carburetor, this engine offers fine tuning and crisp throttle response across the power band. Slide valve carbs are prized for quick pickup and predictable behaviour during acceleration and deceleration.

Performance Data and Key Specs

Specifications

  • Displacement: 0.211 cu in (3.46cc)
  • Bore: 0.654" (16.6mm)
  • Stroke: 0.63" (16.0mm)
  • Practical RPM: 3,000 - 36,000 RPM
  • Power Output: 2.0 ps / 30,000 RPM
  • Weight: 13.9oz (395g)

For racers and experienced hobbyists, the O.S. Engine 21VG-X (P) offers a solid mix of longevity and tunability. Its construction and carburetor setup make it a dependable upgrade for 1/8 scale on-road racers.

Is the 21VG-X (P) suitable for newcomers to nitro racing?

The engine is performance focused, but its robust build and clear tuning range make it manageable for committed beginners who follow a proper break-in and seek basic tuning help.

What fuel mix works best with this engine?

Use a nitro car fuel in the 10-30% nitro range with at least 16% oil content for lubrication to achieve reliable performance and engine longevity.

How does the pull starter improve usability?

A pull starter simplifies track-side starts and reduces the need for a separate starter box in some situations, making the engine quicker to run between heats.

What routine maintenance keeps this engine at peak performance?

Regular inspection of the sleeve and piston, careful carburetor needle checks after each session, and following the recommended break-in procedure will preserve performance and prevent premature wear.

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