Despite the fact that the Blacktop head features a more open combustion chamber (see “Head combustion- chambers”) it still has a better static compression ratio (see “compression ratio”), this is only because of the piston style and design. The Silvertop piston features a pretty small dome with two deeply angled https://4age-engine-for-sale81254.dailyhitblog.com/36795711/everything-about-4age-20v