O.S. Engine OS-13911 Speed 21 VZ-B-V Spec II Competition Spec  [OS-13911]

Purpose-built performance from the O.S. Engine OS-13911

The O.S. Engine OS-13911 is tuned for drivers who demand consistent performance on both track and rough terrain. It combines engineering precision with a compact footprint to suit serious RC car and buggy setups.

High rev capability with usable midrange

This engine has a 3.66cc displacement and produces 2.5ps at 34,000 RPM while offering a practical operating window from 3000~40000 RPM. That range makes it adaptable for different gearing and pipe choices to match driving style.

Balanced dimensions for handling and endurance

With a weight of 349g and a 16.6mm bore paired to a 16.0mm stroke, the OS-13911 maintains a compact mass that aids vehicle balance without sacrificing longevity under race conditions.

Tuning benefits for lap consistency

Drivers will notice the steady power delivery at higher revs, which helps maintain consistent lap times and reduces the need for mid-run corrections.

The O.S. Engine OS-13911 suits competitive drivers looking for a reliable, tunable engine that balances power and weight for race conditions.