the real question one should ask is where is the point of diminished return??? :wizard:

adk,

It gets more interesting when you run the full simulation on these two engines. The results are not exactly what you would expect. I'll post the sim asap

Bob

Bigger bore shorter stroke add more rpm and CRUSH the stroker motor!!! says the oldest student in med school!!! lmfao!

swept volume is swept volume... as I said earlier... the needs are both the same... however.. the big bore/shorter stroke has the potential to dominate over the counterpart... that being said a cylinder head with a bit better flow characteristics would be of an advantage to the BB/SS engine... now put on your thinking cap and see where I'm going with this...

It's been tested and with everything else the same there is no significant difference in power or torque

you would RPM the shorter stroke engine thus making a notable difference in HP just sayin

i remember reading an article steve schmit wrote a long time ago,it addressed a class that was limited to 400 cu in.he said he went with a larger bore and smaller stroke because it had less shrouding around the valves,he was winning so maybe he was right.that was a long time ago.

I see alot of big power forced induction engines today running smaller stroke and big bores. Maybe it's a combination of the fact the larger bores help unshroud the valves , along with modern valvetrain technology to allow them to spin the small stroke setup to a higher rpm and more reliably , than possible years ago. Idk.

Guess we should've addressed the race vs. pleasure variable.

RPM is limited in most pleasure cases. In most engines, you're not going to just keep raising the rpm. Typically speaking your going to run around 5200 - 5800 peak. Over that RPM i could understand how that would be an advantage with a 12,000 RPM funny car.
Plus just because your pulling more HP doesn't mean you've got the torque to keep a boat going. Which brings us to size of boat/application questions. And I think most people running large cid engines don't run flat bottom 18 foot race boats. Plus.... look to my left... if I'm the one looking for opinions about bore vs. stroke, i'm talking about a very heavy twin engine baja. :cool-smiley-011:
I like the stats above about flow. Originally i was thinking a larger bore would require the same volume in a shorter stroke would require more volume, but if RPM is static, the flow would be the same.. still need 502 cubic inches of air for each rotation.

Biggest cubes you can afford and right cam for TQ....