Did any of you horsepower calculator guys ever use this

You been racing long enough, your MPH will get you close to actual HP estimate.
But you knew that.

i don’t put a lot of stock in the numbers because in my case right now I’ve gone 9.42@138mph. But between what I think need a bigger carb (850 gas converted to alcohol), 4.88 gears, and a solid lifter cam, my combo is dead in the water before 1000 foot. Hopefully try a bigger carb this year and update my five year old valve springs.