[blykins]

The dyno is the only way to tell....But generally a longer stroke engine will have a lower redline just due to the mass of the reciprocating assembly.

My engine is 425ci.....using a 4.100" stroke and a 4.060" bore. Max torque was at 4500 and max power was at 5400. I have it chipped at 6000. We spun it to 6500 on the dyno....I didn't think that was too awful high considering the quality of the bottom end components that I put in it....but it just quit making power above 5400....so there's no need to spin it any faster.