Though the Blacktop head incorporates a far more open combustion chamber (see “Head combustion- chambers”) it continue to has a better static compression ratio (see “compression ratio”), this is purely because of the piston structure. The Silvertop piston incorporates a really tiny dome with two deeply angled exhaust flycuts, two https://jeffreyptlnl.thenerdsblog.com/37002274/5-essential-elements-for-blacktop-20v-4age