Mine are a little under 650
and OH HE!! they sound good!

Q,
What did you have done to them and by who?
thanks,
Dean

I know we are running superchillers which is supposed to add 100HP... so just around 650HP if we are correct... There are kits available raising boost, changing to MSD blue box, and a 120* thermostat but we are quite content with a 93MPH boat... lol

SB,
That is one of the first upgrades that I would want to do myself. Great thread!
Dean

Dean Gellner's built up a few 575's that are producing
700+ hp.

He built a couple of sets of dart iron eagles,
supplied me with the custom HR cam he uses
and remapped the ECM's and mine run awesome

I'm guessing mine are in the 650-675 hp range,
being that we kept the compression stock, and
didn't use the heads he uses on his recipe.

Do you have chillers on your 575's?
Thanks,
Dean

No, don't have clearance necessary for them, and scoops
are out of the question.

The neat thing about them is that they totally
look stock....they don't sound like a stock 575
anymore though.

yeah,
I don't know how the scoops thing is going to go over with the wife and kids? But I would really like to have the chillers if I can make it work. It seems to be pretty easy 100 HP?
Thanks,
Dean

I made a scoop hatch for the last boat, the wife
and her friends hated it, and when rafted up,
the drunks, when crossing boats, seemed to like to step on them......CRACK

My only other worry ( if I were able to add chillers)
was supercharger longevity.

Simply adding the chiller usually doesnt net you
all that power, it's when you add the smaller pulley
along with it that gets you there.

These superchargers have had their share of problems,
in stock form.

Putting a smaller pulley and winging the sh!t out of them probably isn't good for them in the long term.

The 575's Vinny P. Rebuilt last winter were mine. We decided to keep them completly stock but use all the best parts. There is something to be said for a 575sci in stock form. They sound and run killer!! Will I be the fastest guy at the next poker run ? No....... But I did finish everyone that I entered and I didn't miss a day out this summer. I would love to crank them up and pull 700+ hp out of them but my season here in NYC is to short to take any chances, Good luck with your rebuild and keep us posted on your results.............. John.