Guess the horsepower on a little pepped-up 390....

[whiskeyrunner]

533 at 6700

[TripleJ]

544 at 6550

[fekbmax]

587hp @ 6640rpm

[cjshaker]

You are going to get screwed again if you don't play the whole game and add an RPM to that guess

I'll even add another incentive:  if anyone guesses the exact horsepower and the exact peak horsepower rpm, they will receive a free set of my new non-adjustable roller tip rocker arms. 

That only applies to the free rocker arms. I won't even venture the odds of hitting the EXACT horsepower AND RPM.

That's why I went in first, figured I'd double bulb ya.

I'll be waiting with my finger on the keyboard to change my guess at a moments notice before the event

[blykins]

Dyno rpms will be in 250 rpm increments.

[Drew Pojedinec]

$1!!!!

[Barry_R]

I'll take a swing at it.

I was trying "not to" because the combination is so unusual that I am almost guaranteed to be wrong.

Torque peak of 485 at 5000 RPM, power at 581@ 6500 RPM

[Tobbemek]

My wife seas 556HP -6400 RPM and she is always smarter than me.

[Heo]

My wife seas 556HP -6400 RPM and she is always smarter than me.

[TorinoBP88]

Nice project!

The C8OE heads will hold it back some obviously, but i think it will be interesting.  Ill say 560-575 hp. If the heads are really good, 625 hp.

[69Shakar]

539@6750

[mike7570]

uncorrected 539hp @  6800

[mike7570]

Wasn't reading all the post ^^ I guess we think alike. looks like more than two at 539.
RPM tie breaker?

[fryedaddy]

568hp at 6750 rpm

[stubbie]

579 @ 6500