Even though the Blacktop head incorporates a additional open up combustion chamber (see “Head combustion- chambers”) it nonetheless has a better static compression ratio (see “compression ratio”), this is only due to piston design and style. The Silvertop piston contains a pretty little dome with two deeply angled exhaust flycuts, https://dftsocial.com/story19260203/a-review-of-4age-blacktop-engine-for-sale