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Originally Posted by Streetwize
Most 4 cylinder 4 valve motors often/usually have much larger strokes than bores and some of them rev to 8500 or more easily. A mitsubishi 4g63 motor is a good example, early first gen (89-92) blocks have 1.6:1 rod ratio rods and routinely take 9000rpm and 24psi of boost and make over 350 streetable horsepower, to put that into perspective, a 427 would need to produce 1225 hp to equal that HP/Cube.
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Your math is pretty close. I'm assuming the 24psi of boost was coming from a turbo? The FE above was dyno'd at 1,030. To drive the blower is probably over a 100HP, so call it 1,130 HP. And the owner was still working on the tune. I don't think he needed to go over 5,000 rpm to do those numbers either. I understand he's working on a twin-turbo FE hemi SOHC next.
9,000 rpm
why? just to get 350 HP? a big block can make 350 HP right out of a clapped out 1967 LTD with a little freshening. You got to know what to spend your time on/with.