Horsepower Estimate?

a-bodyguy said

Its weight and mph=hp period
Everything else is just about et gears/verter/traction/tunning
mph might change abit if it does you refigure it
you take your weight and mph= hp
Then look up weight and that hp will tell you the quickest et you can run if everything is perfect aka traction/gearing/verter /tunning
At some point when everythings perfect and you get that best et for that mph, at that point you need more power to go quicker

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These charts and graphs are all ok but there can be things that kinda mess up the numbers. Example my duster with my 422 Indy headed 422 ran [email protected]
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My Edelbrock headed 408 has gone [email protected]

My 422 had a solid lifter cam, 4 year old springs, and an 850 carb. This engine was out of steam at or before 1000 foot with my 4:88 gears

My 408 has the same size lift cam but it’s a roller cam. I also upgraded to a 1000 cfm carb. I never have ran it 1/4 mile as every track runs my class 1/8 mile. But it is pulling like a mule up top compared to my 422. I know it would probably run 9.28-9.32 but if you would run the numbers on an 1/8 mile chart I’m thinking the horsepower numbers would be off. So gearing has to be a factor I’m sure. So wouldn’t carb size play into this too.