Regardless that the Blacktop head includes a additional open up combustion chamber (see “Head combustion- chambers”) it nonetheless has a greater static compression ratio (see “compression ratio”), this is solely due to piston style and design. The Silvertop piston incorporates a very compact dome with two deeply angled exhaust flycuts, https://bookmark-master.com/story18533457/the-basic-principles-of-toyota-4age-blacktop-engine-for-sale