440 HP Estimate

340mopar said
If you offset grind .060 you only get half that (.030) in stroke. The bearing shell (and new crank pin) is .060 smaller in total diameter. You are only gaining the thickness of the bearing shell half.

I used to think that also till I was shown exactly how it is done. I will try to explain so everyone can understand this.........picture when the crank is at the bottom of its stroke, while offset grinding u are taking off the top .050 to .060 thou depending how much wear there was to start with, and only .005 to .010 on the bottom to make the .060 thou smaller size.This moves the centerline farther out, which in turn brings the piston that much further down, then that much farther up, equalling stroke increase x2. Believe me it took a while to convince me at first. I guess you may just have to see it for yourself, once you see it you will believe. .........older+wiserkimmer.