Even though the Blacktop head contains a more open up combustion chamber (see “Head combustion- chambers”) it even now has a better static compression ratio (see “compression ratio”), this is purely as a result of piston design. The Silvertop piston contains a very tiny dome with two deeply angled exhaust https://felixxhhdu.prublogger.com/30720102/5-essential-elements-for-blacktop-20v-4age