340 Vs 360

273 said

A 410 vs a 305 would more realistic, at similar lbs-ft:cid a 8,000 rpm 410 would be about a 11,000 rpm 305, why same top end? say you base the parts on a 11,000 rpm 305 probably won't work so well on the 410 and vice versa, it's hard to do apple to apple comparison since each combo needs to be tailored for each application. So what's apple to apple if different parts are required ? What it takes to make same hp? Other?

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The point of that bench racing comparison with multiple strokes was to demonstrate that RPM *isn't* "king of horsepower".

Incrementally reducing stroke will require you to run more RPM (and usually more cam duration) to achieve the same horsepower but it sure-as-**** won't make *more* horsepower.

As a general rule, whenever you are working on an engine platform with multiple different displacement offerings available, and top end and valvetrain components are interchangeable between.

The best practice for making horsepower is to start with the biggest displacement you can. And build from there according to the required application.

There may be the occasional exception to the rule, but it's extremely rare to increase potential horsepower by reducing displacement.