Even though the Blacktop head contains a far more open up combustion chamber (see “Head combustion- chambers”) it nonetheless has a higher static compression ratio (see “compression ratio”), this is solely because of the piston style. The Silvertop piston contains a pretty tiny dome with two deeply angled exhaust flycuts, https://titusgggfe.bloggin-ads.com/54660362/5-essential-elements-for-4age-blacktop-for-sale