The Birmingham Blower: 1939 Velocette Roarer Replica

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by Robert Smith
Dan Smith's 1939 Velocette Roarer replica.

1939 Velocette Roarer Replica
Engine: 498cc air-cooled supercharged SOHC parallel twin w/two counter-rotating crankshafts, 68mm x 68.25mm bore and stroke, 7.5:1 compression ratio, 54hp @ 4psi boost (est.)
Top speed: 140mph (est.)
Carburetion: Single Amal 10TT9 w/Shorrock-type supercharger
Transmission: 4-speed, shaft final drive

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