Originally posted by fillibuster
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Cory's post, the chart is a power curve for 1915 high duty Harley twins compared to a stock 1914 Harley. It does not clearly specify horse power or torque. The chart also displays an unusually smooth curve for both motors. To produce good power there are to many variables to detail easily.
The Ghost uses a stock Harley Davidson cam shaft, stock 1914 cylinders and engine cases, a period correct screw on Schebler carburetor, even a stock exhaust system including muffler packing. Flywheels are remanufactured from exact replica 1914 castings machined to increase stroke to 1/8 greater off center location of the crank pin to provide clearance for the over size crank pin.
Much attention was paid to the small stuff , details. The intake tract from the open end of the carb. all the way through the open intake valve. I sought to include both volume and velocity inside of the intake system to achieve performance levels obtained by the 65.5 inch 1914 motor.
The new found high rpm's caused intake valve float which required redesign of my intake valve springs and other valve train components.
joe
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