Say you have a 2275 cc VW (94/82 bore/stroke) and you derate it to 2750 rpm. Scaling from the O-200's displacement and output, this should give you a nominal 67 hp engine, call it 50 hp continuous (75% cruise).
Would a VW conversion so stressed last for long? The crankcase was sized for 1600 after all, but I think improvements have been made over the years. Will the bottom end hold up?
Then there's the cylinders. Fin area is likely compromised a bit by the larger diameter, but the hot rod guys seem comfortable with this diameter. Will the cylinders and heads deal with 50 hp continuous?
Actually, is there enough valve area to breathe well enough to make 50 hp at these lower rpm's?
Would the results be better using a smaller bore and stroke and rating the engine at a more typical 3300 fpm?
Would a VW conversion so stressed last for long? The crankcase was sized for 1600 after all, but I think improvements have been made over the years. Will the bottom end hold up?
Then there's the cylinders. Fin area is likely compromised a bit by the larger diameter, but the hot rod guys seem comfortable with this diameter. Will the cylinders and heads deal with 50 hp continuous?
Actually, is there enough valve area to breathe well enough to make 50 hp at these lower rpm's?
Would the results be better using a smaller bore and stroke and rating the engine at a more typical 3300 fpm?
