There are a lot of variables that can effect 'RWHP' so lets talk about flywheel HP.
First question is what fuel?
Keep this simple rule in mind...
The fuel you run
dictates the cylinder pressure (compression) you can build,
which dictates the minimum 0.050" duration of the cam you run,,
which dictates the effective RPM of the motor.
It's a bit counterproductive to say.. "I want to use 'this' cam and make 'this' HP". Not saying it can't work,, just that you may throw an additional $1000 at it trying to make a $300 cam work!
That said,, 500 is about as easy as falling off a log these days,, but you will have to follow what I call Roger Rule #2
(Roger Copeland being a wise old friend that taught me buttloads about just general engine building)
His favorite comment is
Quote:
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Make your choices, pay your money, and live with the results
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So choose a fuel and we'll talk