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If he could he would.!
I just don't see how he can't get that hp. ?? i have a 440 stock stroke .040 over stock crank & rods with cheap kb pistons & Indy SR head with a very mild port job M-1 intake no port work at all & 950 carb with a solid lift cam 282/292 & 540/559 lift with 1.6 Indy roller rockers & TTI headers and i am making 580 hp & Tq at the same & i had it Dynoed so its not a guess HP motor.!

*** So you are saying a hemi with better heads & bigger Valves better rod & pistons and a roller cam set up and head work & intake work with good headers won't out do mine. ?? ***

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I would tend to think it would be pretty hard to get 600 - 650hp out of a stock stroke street hemi while still being streetable and able to run on pump swill. A factory race hemi grossed out in the 550ish range with headers IIRC.

I think your friend needs to;

- pony up and stroke it
- give up being streetable and pump gas friendly
or
- lower hp expectations to something more reasonable; maybe 500 - 550hp

Dave

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Of course he can make his 600-650hp......but if he want's to make it out of a 426cu in engine running around 10:1 so he can use garbage fuel, it is going to have to be more radical than I would consider "streetable".....YOUR definition of streetable may be different.

in almost EVERY example given in this thread, the motor is larger than 426 cu in......because stroking it is the cheapest and easiest way to get the hp AND have the engine remain relatively tame.


Dave