84mm bore Compression distance 1.379” Dome height 0.035” 0.6cc positive dome Intake valve pocket 0.120” deep x 12 degrees Exhaust pocket 0.110” deep x 12 degrees. I'm using an l24 block, l28 crank, l24 length rods. The pistons were designed as a 'cheat' gives me 2627cc. Big(ger) valve e31 head. 39cc. 10.5:1 cr, 294 deg cam This gives me a rod/stroke ratio of about 1.68 against a 1.8ish as standard. The way I understand it this is slightly 'better'? Or have I understood wrong?