Worcester County Model A Club
© 2015, 2016, 2017 Worcester County Model A Club
 Specifications Engine Specifications Engine Displacement 200.5 cubic inches Bore 3.876" Stroke 4.250" Brake Horsepower 40 HP at 2200 rpm Torque 128 foot pounds at 1000 rpm Firing Order 1-2-4-3 Compression Ratio: 4.11:1 Transmission Specifications Gear & Shaft Material Chromium alloy steel Gear Ratios High-1:1 (100%) 2nd-6.89:1 (53.8%) Low-8.75:1 (32.04%) Reverse-26.7% Bearings Main shaft front (ball) 1208;  Main shaft rear (ball) 1306 Transmission Case Length 6.560" to 6.565"  Clutch Specifications Material Molded asbestos composition Pressure Plate Weight 15 pounds Clutch Disc Weight 2-1/2 pounds Pivot Pedal Pressure 30 pounds Clutch Facings 9" diameter, 9/64" thick Inside Diameter 5-3/4" Total Acting Surface Area 75 square inches Clutch Pedal Clearance 3/4" for multiple disc, 1" for single  Clutch Release Bearing Hub 2.065" diameter Clutch Throw Out Bearing B7580 or B7580T Clutch Pressure 1100 pounds Radiator Specifications  Standard Radiators 1928-29 Tubes Flat 1/2" seamless Number of Tubes 101 in 3 rows, staggered at 9/16" centers Number of Fins 5 fins/inch-98 fins Core Size 19-3/4" x 19-1/8" x 2-3/16" centers 1928-29 Heavy Duty 8 fins/inch-158 fins Standard Radiators 1930-31 Tubes Flat 1/2" seamless Number of Tubes 95 in 3 rows, staggered at 9/16" centers Number of Fins 5 fins/inch-100 fins Core Size 20-1/8" x 18" x 2-3/16" centers 1930-31 Heavy Duty 8 fins/inch-167 fins Wheel Specifications  Material Steel Diameter 1928-29 21" 1930-31 19" Rim Drop center type;  Width  1928-29 2-3/4"  1930-31 3" Tire Specifications Size 1928-29, 4.50" x 21" 1930-31, 4.75" x 19" Recommended Tire Pressure 35 Lbs Station Wagon 5" x 21" or 19", pressure 40 lbs Tread Width 21" = 3.75", 19"3.90" Number of Spokes 30, 1/4" diameter