If torque is the name of the game, then why are racers not building 6" stroke motors with 2" bores? I dont disagree that longer stroke motors make more torque every thing being equal. I just believe the parasitic loses with the longer stroke cancel out some of that extra torque. Higher piston speeds and bad rod angles create friction. I have see more bad ass short stroke big bore motors than square motors. Just look at Doms 470 for example. Nothing real fancy mild roller with rpm heads and it makes more power than any 511 I have seen. I believe he's making way over 700hp with that. Andys 470 was a bad ass compared to his 512. One other thing, short stroke spins higher and rpm is hp. Pro stock runs short stoke motors, under 4", 3.6 I believe, but they do have other reasons for that, CI limited.