.Rich12:
Your hole shot is going to be based on how much torque (not HP) you can get the engine to produce at bottom end. Much like a drag car. If y ou run too big a rear tire, the car will fall on its face, then restart to accelerate.
Same with the prop. I think using torque in your calculations would give a better answer. So I would figure ft/lbs of torque from the 1.85 / 27 vs the 1.75/23. My head says the 23 will come out quicker because you can surge into the torque/rpm curve faster.
Out of the hole its torque/HP . HP will help carry your speed on top end assuming the engine can pull the prob past its peak torque curve.
They’re basically identical rpm to speed as I’m comparing 1.85/27 and 1.75/25, the torque at prop shaft is higher with multiplication from the 1.85 gearing and my thoughts was it would accelerate slightly quicker as it would “spool” up better possibly and the taller pitch have more bite like a taller tire with stiffer gears think 28” with 4.10s vs 26” with 3.90s in drag racing as both cross the 1/4 mile traps at similar rpm in 1:1 trans gear. I realize we’re starting to splits hairs, though was just curious.
