Although the Blacktop head contains a much more open up combustion chamber (see “Head combustion- chambers”) it nonetheless has a higher static compression ratio (see “compression ratio”), this is only as a result of piston layout. The Silvertop piston encompasses a incredibly modest dome with two deeply angled exhaust flycuts, https://blacktop-4age00802.blog-gold.com/38904785/5-simple-statements-about-toyota-4age-engine-for-sale-explained