O.S. Speed B2102 Competition .21 Engine w/T2090SC Pipe

Tower Stock# LXGJVU  •  Manufacturer Stock# 1A301
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Notes from our tech department:
This is the O.S. Engines Speed B2102 1/8 scale Competition Buggy Engine
with the T2090SC Tuned Pipe.

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


Low cylinder head reduces the buggy's center of gravity by 0.67"
(17mm) for better stability during aggressive driving
Newly designed 22C slide valve carburetor for better fuel economy
Tungsten weighted crankshaft with diamond-like coating and silicon
Bypass of crankcase is modified for better performance
Tuned pipe is constructed of aluminum with polished natural finish
and has an EFRA-2089 noise rating


O.S. Engines Speed B2102 Engine with P3 Turbo Glow Plug
T2090SC Tuned Pipe
6.5mm Carburetor Reducer in Red
Exhaust Seal Ring
One each 3mm, 16mm and 18mm Dust Caps
Instruction Manual


Fuel: 10-30% nitro content, 20% recommended for break-in
Air filter, glow starter and track equipment


Displacement: 0.211 cu (3.46 cc)
Bore: 0.646 in (16.40 mm)
Stroke: 0.646 in (16.40 mm)
Practical RPM: 4,000-42,000
Power Output: 2.65 PS/2.61 hp @ 34,000 rpm
Weight: 12.25 oz (347 g)
Crankshaft Size: UNF1/4-28
Distance/Mounting Hole Centers Same Side: 0.83" (21mm)
Distance/Mounting Hole Centers Opposite Side: 1.45" (37mm)
Width of Crankcase below Mounting Tabs: 1.2" (31.6mm)
Width of Mounting Tabs: 1.8" (45mm)
Height/Mounting Tab to top of Cylinder Head: 2.6" (65.9mm)
Height/Mounting Tab to center of Exhaust Outlet: 1.1" (28mm)
Height Crankcase Bottom to top of Cylinder Head: 3.2" (81.5mm)
Length of Crankshaft end to Front Bearing: 1.2" (29.5mm)
Length of Crankshaft end to Backplate: 3.7" (94mm)
Length of Crankshaft end to Center of Crankcase: 2.9" (73.5mm)

Carburetor Settings;
(Carburetor is preset from factory and should only require very
small adjustments)
Needle Valve: 3 turns open from fully closed
Mixture Control Valve: One turn screwed in from flush position with
carb body
Metering Needle: 0.3-0.4mm protruding from flush position with carb
Throttle Stop Screw: Approximately 0.5mm from carb body when viewed
from above

T2090SC Tuned Pipe;
Length: 6.6" (167mm)
Diameter: 1.4" (35.2mm)
Exhaust Outlet Diameter: 0.31" (8mm)

jxs 12/03/17



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