Though the Blacktop head incorporates a much more open up combustion chamber (see “Head combustion- chambers”) it still has a greater static compression ratio (see “compression ratio”), this is solely as a result of piston style. The Silvertop piston contains a very modest dome with two deeply angled exhaust flycuts, https://4ageenginesale15815.like-blogs.com/31206944/the-single-best-strategy-to-use-for-blacktop-4age-for-sale