Quote:
Originally Posted by Larry Hill
Mike Mans,
I worked most of yesterday on the flow bench and lathe (making test valves, you know changing back angle, stem radius, surface finish, and waist diameter) and picked maybe two to three HP. I do need help on finding the remaining 75 to 85 HP I need to make it a race in a heads up situation.
Breaks over back to work!
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Larry.....Just port the heads like your competition and blast them with "Black Beauty" (acid isnt as good) to hide what you did. Use the rough grit. $35 worth of Black Beauty and 10-15 min. per head is all it takes. It works great on both alum. and cast iron heads and intake manfolds. Thats at least 1/2 of the HP min. your looking for on a 440/383 head. Dont forget to fill the heat riser with an old broken racing piston (Im sure you have a couple of those after the demise of your engine) to as close to the bowel area as you think you dare so the tech inspectors wont get upset. That alone picks up that one port close to 5%. If you dont believe its being done then Ive got a nice bridge I can sell you ! LOL