Quote:

---

What is the real world difference of an engines power band, given that they have equal displacements but different strokes?

For example: If you took a 4.25" bore x 4.25" stroke HEMI it comes in at 483", and if you took a 4.5" bore x 3.75" stroke HEMI it comes in at 477". All else being equal, ie same heads, cam, headers, intake, etc, would there be any difference in the dyno sheets? Theoretical answers are welcome, but do any of the engine builders have any examples of actual builds?

I chose the HEMI because it's not a suseptible to shrouding with the smaller bore.

---

I'm not sure if the compression and bore combination or if it is the bore and stroke combination make the dfference in the results I have noticed that wedge motors with less then 10.5 to 1 compression, regardless of stroke, make more torque than HP on pump gas Higher compression motors make more HP than torque at a higher RPM on peak HP and peak torque RPMs I have seen more HP and torque per C.I. with similar heads on the larger C.I. motors during engine dyno testing If it is a street pump gas motor use the longest stroke you can, regardless of bore size