O.S. Engine OSMG2072 21VZ-R Turbo II Competition .21 Engine  [OSMG2072]

High-Rev Turbo Performance for Circuit Use

The O.S. Engine 21VZ-R Turbo II, model number OSMG2072, is aimed at 1/8 scale on-road racers seeking a compact turbocharged powerplant. It combines tuned internals with rugged components to suit repeated race duties and precise setup work.

Crankcase and Porting Improvements

The internal crankcase has been tuned to enhance mixture movement while the re-shaped liner port promotes consistent combustion across the rev band. These tweaks help the engine stay tractable whether accelerating out of corners or holding top speed.

High-End Head and Reinforced Piston

The button-shaped inner head supports improved high rpm breathing and the piston, machined from bar stock, adds resistance to fatigue under race stresses. The two-piece turbo cylinder head and rear exhaust arrangement remain familiar to experienced mechanics.

Accurate Carburetion and Installation Flexibility

Equipped with the 20K slide-valve carb, the engine allows careful adjustment of fuel delivery for different circuits, and the repositionable universal fuel inlet nipple aids installation in diverse chassis layouts.

The O.S. Engine 21VZ-R Turbo II is well suited to experienced racers who tune for lap time and engine response. Its construction and tuning range support competitive circuit use.