O.S. Engine 21VZ-B V-Spec-T (P)  [OSMG2068]

FEATURES:

• Hardened, chrome-plated, 4-port, cylinder and liner for high durability and long life
• Machined steel piston features parallel rings that trap fuel oils and use them as a seal to enhance compression and boost power
• Reshaped crankcase core ensures smoother air flow and more consistent performance
• Slide valve carburetor with 8mm and 9mm carb restrictors allow tuning to specific track conditions, low-end needle adjusts from side to side for maximum adjustment ease
• V-shaped two-piece turbo head design provides fast heat dissipation

INCLUDES:

• One .21 VZ-B V-Spec-T (P) racing engine w/21C carburetor
• One P3 Ultra Hot Turbo plug
• One instruction manual w/OS decal
• One extra head shim/gasket(The other gasket is pre-installed)
• One 8mm carb restrictor
• One 9mm carb restrictor
• One exhaust port seal ring
• Two carb rubber gaskets
• One carb cover
• One exhaust cover

REQUIRES:

• #203 Air Cleaner Assembly, OSMG2360
• Fuel with at least 16% lubricant and 15%-30% nitro.
• Most of the fuels we carry meet or exceed the lubricant content required for optimum performance and maximum engine life.

SPECS:

• Practical RPM: 3000-40,000
• Output: 2.48 bhp @ 33,000 RPM
• Bore: 0.654in
• Stroke: 0.630in
• Weight w/o Muffler: 12.7 oz (360g)
• Height from crankcase bottom to top of cylinder head: 110.6mm (4.4")
• Height/crankshaft center to top of cylinder head: 95.3mm (3.8")
• Width including mounting ears: 45mm (1.8")
• Width not including mounting ears: 30.8mm (1.2")
• Width between mounting holes same side: 21mm (.83")
• Width between mounting holes opposite side: 37mm (1.5")
• Cylinder head diameter: 57.2mm (2.3")
• Length of exposed pilot shaft/crankshaft: 29.6mm (1.17")
• Internal thread size at end of crankshaft: 3mm

COMMENTS:

• Turbo glow plugs do not require a copper gasket.
• With the carb restrictors, the driver can select either low fuel comsumption or high power, allowing a wide range of engine control. Usage is as follows:
  • -9mm Blue: Fitted with carb when it leaves the factory. suitable for high-speed and flat courses that require power.
  • -8mm Red: Supplied with engine. Suitable for technical and bumpy courses and when less fuel consumption is more important.