Re: How many HP is a 439 cc engine?
Not sure how to answer that as it all depends on the design of the engine.
Are we talking a 2-stroke, 4-stroke gas or diesel. supercharged, turbocharged, what compression ratio is it, carbureted, fuel injected and on and on.
493cc's only refers to the displacement of the engine. The area swept by the piston(s) from top of the stroke to the bottom of the stroke.
A 493cc engine can have a much as 200 hp or maybe as little as 1 horsepower!