max power on stock 2v heads?

fivemustangs said:

I have been looking around but could not find the max amount of hp anyone has got with stock 2v heads on a forced induction engine. Does anyone know what you can make with a built bottom end, intake, cams, exhaust and say 15-16lbs of boost on stock unported heads? also all supporting mods needed. Would 500's be in reach? Thanks!

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Yes.

Many bone-stock internal 4.6 2Vs are making 450HP at the crank with just 10 pounds of boost...

The question I would have is this: Why would one go to the trouble and expense of building a stout bottom end, getting good cams and putting blower on it all the way up at 15+ psi and stick with bone stock head castings? You could, but why?

Why not at least give them a bit of a bowl cleanup? Work the short-side radius a bit? A decent valve job? Or better, trade up to TFS heads or ported PI parts...

Seems weird to put so much money and effort into the whole package and then gaffe at the last minute by going cheap on the parts that are allowing air into and out of the engine. It's like getting this super-awesome milkshake and then trying to sip it out with a tiny little straw...

"Horsepower", the saying goes, "is in the heads." Approach the package that way: That stout bottom end should be built to withstand the power the heads will produce, not in spite of them.

500 is about right although you might get to about 550. The difference with ported heads and cams is another 100-200 HP.

With 12 lbs of boost, we got to about 420rwhp. Had Livernois port the heads and change the cams and I'm getting another 200+hp with 14-16lbs of boost. With some tuning, newer impeller, and higher octane fuel, I should be able to hit 750Hp. Might need a bigger MAF though.

I had a local near 600RWHP range with a ****na load of boost. However his exhaust guides were toast at about the 15K mark when we redid the heads.