I use a flat top because the heads I use have a large combustion chamber
and I need the compression.
This quote you might find interesting:
"Here's the last piston design we cam up with for a NASCAR NW Tour engine.
For those that don't know the rules, these motors are 23* raised runner heads
with unlimited portwork (no welding) ported cast intake manifolds, roller cam,
any bore/stoke/rod combo (358" max),9.5-1 comp. max, and a untouched 390
carb.
These photos are of pistons that made about 8hp more than a reverse dome in
the same exact motor with the same exact specs on the same dyno. Nothing
was changed but the piston design"
