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4800 @ 3.3" stroke @ 1400 rpm = 770 ft/mn piston speed
1.0 @ 3.03"stroke @ 3000 rpm = 1515 ft/mn piston speed
Yup the 4800 would be turning quite slow- actually by some accounts too slow while the stock geared 1.0 is above it's best range of 1000-1200 ft/mn at 65 mph.
You aren't going to get 50 mpg at 65 mph either.
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