That tool is definitely simpler. I plugged your tire size into the other one just to see if I would get the same answer and I did. It is kind of cool to push the throttle up and see what happens. With 400hp, tach at 4237, if your car is 3000 lbs, you're running 119.52. I have no idea if I did any of this right but I'm starting to think after I finish Granddad's falcon, I'm going to need another one so we can race each other.
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