416 Longblock built-need help deciding on camshaft-SR or Ft?

jbc426 said
I missed this part, but how is a dish piston going to be able to provide quench?

I'm in the process of lowering the compression in my 493" RB from 12 to 1 to 10.2 to 1. With a .040" thick head gasket, and a 75cc heart shaped chamber. I still have to run a zero deck step piston with something like a 23cc dish just under the valves leaving over 2/3rds of the piston a flat top at zero deck.

I don't understand how those dished pistons with just a ledge around the perimeter will provide any quench. Please clarify if you would.
Click to expand...

I will measure the width of that ledge and let you know just how much area it covers but experience tells me it still provides a significant amount of charge motion.

The step pistons you are referring to in your 493 sound like an Icon piston which is basically 2/3rds of a piston with a much lower compression height and they don't offer much quench at all. J.Rob