While the Blacktop head contains a extra open combustion chamber (see “Head combustion- chambers”) it nonetheless has an increased static compression ratio (see “compression ratio”), this is purely as a result of piston design and style. The Silvertop piston contains a pretty modest dome with two deeply angled exhaust flycuts, https://paxtonjqopn.blogmazing.com/30723960/indicators-on-4age-20v-turbo-engine-for-sale-you-should-know