Technical > Matt Shaff's Engine Shop

compression and bore increase hp gain?

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wideopen231:
511 was 4.378 with 4.25 stroke. My thinking is I can build it 15:1 and change gaskets for 13.5:. As for dome it is there no matter with a Hemi. Most of my compression gain will be in valve pockets I have a butt load of clearnace with pistons in motor  now. I think I can get to almost 14:1 with just more piston in that area, Heck right now with rods I have and pistons I had I am .020 down in hole which would be ,5 of it right there.

Oned thing about build most compression I can with .040 gasket is if lowering with gasket I move the whole chamber awa fro piston including top of dome, WOuld seem has to hel flame travel. Or so My therory goes.LOL

 Question was bout power gain and if chance desktop dyno is correct in the 60 hp to 70 hp depending on how I work cam timing.

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