How much power do engine mods yield?

That is at the wheels Bill!!!
15 psi on that pass. (14.95 actually)
Will

Wow! WOW!!!![/If you use the "85%" time-honored rate that everyone seems to believe, for converting rear-wheel horsepower to flywheel numbers, then that means that this 225 slant six was actually putting out 570 FLYWHEEL horsepower (my calculator says that 570 times 85% is 484.5.) on ONLY 15 pounds of boost!

That, my friends, is just amazing!!!

I can't IMAGINE what it might do, if the boost level were raised to, say, 25 pounds!

Will, are there any plans for another dyno-test, or another assault on the quarter-mile at increased boost levels? I know you shut down early on the one 9-second pass you made. Sounds like if you increased the boost to, say, 25 pounds, and stayed on the throttle all the way to the finish-line, some incredibly-fast numbers could be posted!

Curious minds want to know... :blob:

And, thanks again for the explanation.... it's a mind-blower...