Quote:

However a proper chamber shape could also recreate the dish effect you suggest is beneficial, thought I read somewhere less piston surface area, ie flat is more efficient, with all other parameters being optimized. /2


You would have to create more volume somewhere, so reduced quench would be the result. If we are talking about something like a 450 to 470 inch BB, then you have some choices, dish the piston and cut the head, or just run a flat top for pump gas. Once you go past that number of cubes, a dish will be needed anyway. I have 440-1 heads with 62cc chambers. They would need a dish for pump gas on anything bigger than about 420 cubes ,just off the top of my head. But the surface to volume ratio would be better with a dish than a 75 cc chamber and no dish.
I suspect the comment about flat tops being better was meant to mean no dome. I fully agree with that, thats why I had the heads cut so far to reach 15/1 compression, very little dome.

8..603 156 mph best, 2905 lbs 549, indy 572-13, alky