Quote:
Originally Posted by dci
Apparently there aren't to many engines making 2.3 HP per cube normally aspirated out there, brand X or otherwise LOL. So it looks like our little old Pontiac's are holding their own with several here making at least 2 HP per cube !!!! I think we are way to hard on ourselves and place way to high of expectations on the people willing to venture into that territory. When in reality we are holding our own with these old Dinosaurs LOL.
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For a Small Block type engine, 2.3 is not very difficult.
However a Big Block Sportsman type build, in the 550-650 inch range, 2.3 is a tall order and the larger the engine gets, the taller the order.
It can be done I have a couple that are right 'at' 2.30, not cheap builds. Billet intakes, big carbs, expensive cylinder heads, aggressive valvetrains. My 638 at 2.3 makes peak hp at 83-8400 and shifts at 9000 rpm. That's a little extreme for a sportsman engine and given the CID.
Can a Pontiac do it? Not easily. Cubic inch for Cubic inch, the big bore/big valve Chevrolet or Ford has the advantage.
As always, the best scenario for the HP/CID game is the smallest CID possible so you have the greatest valve and bore per CID ratio, and the most efficiency with the shorter stroke.
560-580 CID Pontiac, 2.3 per is going to be $$$$$$$$$$$$$$$$$.