How much power do engine mods yield?

15 psi

Will

Thanks, Will!

That slant 6 made over 484 flywheel horsepower on only 15 pounds of boost. A am assuming (correctly, I hope,) that the motor was on an engine dyno when this graph was produced,..

correct me if I am wrong.

The engines in Tom Wolfe's Dart and Ryan Peterson's cars, which show (on the Wallace online calculator,) to make just over 500 horsepower, were using 18 pounds to do it, not an unreasonable result, for that increase in intake pressure, I think.

But, 484 horsepower for only 15 pounds of boost, is a phenominally-good number IMHO!

I know you shut off early on your 9-second quarter mile run, Will, but how much boost were you running on that pass?

Thanks a lot for the dyno results!