Low speed torque and driveability ?

Check out the formula in post #22. That formula is mentioned in every article on how to calculate rear wheel horsepower. I may have them crossed.
Hmmmm, and how does it calculate the difference between a 727 w/a soggy juicewheel and a Dana60, vs a rollerized 999 w/a tight juicewheel and an 8.25"...??? Asking for a friend...