Cam Math.xlsEOIT Worksheet.xls

Been doing some more digging and found these calculators to come up with EVC & IVO times. I have based these off a Big Mutha Thumpr camshaft. now my understanding is that I would want to put in the injector timing seconds I time between EVC & IVO to reduce the amount of fuel sucked into the open exhaust but still maintain spray onto the back of the IV, doing this at running temp and allowing a bit longer at warm-up to help fuel atomisation? Am I correct in the way I'm working this EOIT calculator.