Ported Edelbrock versus W2 out of the box !

I helped design and dyno the KB quench dome pistons
much easier than welding up the chambers :)
Quench- two parts
two cold surfaces
not enough space left for enough molecules to support combustion
push chamber closer to plug
SQUISH
turbulence and tumble and swirl
but you can have too much- blow out the fire
you can have less with high octane fuel or alky
goal is to get chamber - all points -as near the spark plug and the exhaust valve as possible
Tougher with a Big block except with the 413 Truck heads where the spark plugs come in from the top like a small block
as others have said you can get race high hp with an open chamber and high octane
Those comments on dome pistons are correct- we learned that with the 413 wedge- fire slots were a band aid
for the street quench and Squish rule