O.S. Engines, Speed 21V-SPEC AL

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OSMG2069    Speed 21V-SPEC AL

TECH NOTES

This is the O.S. Max Speed Tuned.21 VZ-B V-Spec Off-Road 1/8 scale
Racing Engine with Aluminum Heat Sink Head.
Ideal for Mugens, Infernos, and hybrid trucks.

**Additional Technical Info Will Be Added When It Becomes Available.**

****** Because of the expressed racing nature of this engine, ******
******     it is NOT covered by the O.S. 2 Year Warranty      ******
******               per page 25 of manual                    ******

FEATURES: Hardened, chrome-plated, 4-port, cylinder and liner for
high durability and long life
Specially coated crankshaft with precision ceramic bearing that
greatly reduces friction, plus a Tungsten weight for added balance
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 aluminum head provides fast heat dissipation

INCLUDES: O.S. Max Speed Tuned.21 VZ-B V-Spec engine w/ carburetor

REQUIRES: #203 Air Cleaner Assembly, OSMG2360
Exhaust System: T-2060SC WN tuned silencer (OSMG2938) developed
specifically for this engine
Fuel: Most of the fuels we carry meet or exceed the lubricant content
required for optimum performance and maximum engine life. In the
past, the conventional lubricant content used in fuel was 18%. But
with new advanced technologies, fuels like Red Alert and O'Donnell
for example, have a better quality of lubricants even though the
percentages of lubricant content are lower. These high-tech
lubricants provide exceptional cooling and protection.

SPECS:    Practical RPM:
Output:
Bore:               0.654in
Stroke:             0.630in
Weight w/o Muffler:
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 consumption 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.

NEEDLE SETTINGS:
High Speed - (see pg 17 of manual) 3 turns OUT from fully closed
Metering Needle - (see pg 22 of manual) Head of screw is flush with
ball link body
Mixture Control Valve - (see pg 22 of manual) Head of screw is 1 full
turn IN from flush with carb body

ACCESSORIES

THIS IS THE O.S. MAX .21 VZ-B V-SPEC BUGGY ENGINE W/ALUMINUM HEAD
FEATURES: HARDENED CHROME-PLATED CYLINDER & LINER, RESHAPED CRANKCASE CORE
ENSURES SMOOTHER AIR FLOW, SLIDE VALVE CARBURETOR W/8MM AND 9MM
CARB RESTRICTORS TUNING TO SPECIFIC TRACK CONDITIONS.
REQUIRES: 10-20% FUEL W/18% OIL CONTENT, HEADER, COUPLER, TUNED PIPE.