Im not sure what the CFM numbers are for carbs. Stack injection has one butterfly per hole, which in this case are 2-5/8" butterflies. The injection doesn't fire like electrical injection. The Mechanical set up is a constant fuel system. There are 8 injectors that are constantly putting fuel down the cylinder. There is a distribution block that increases flow into the injectors as you move the throttle. The rate is regulated by one (pill) or jet. Tuning is backwards from a carb set up. If you want to lean out the system, then you use a bigger pill, to reduce fuel pressure. Richer you use a smaller pill to add fuel pressure into the system. The injectors come in lots of sizes. The injector size is like a power valve or accel pump in a carb. it allows only so much fuel in the cylinder. The more pressure will ad more fuel but that's why the fuel pumps are flowed. The mechanical fuel pump doesn't run only one flow. As the motor increases RPM the pump, pumps more fuel increasing the pressure. Its a real simple system once you understand how they work. Hopefully this helps and doesn't confuse you more. Ill be in parker this weekend if you see me come by and I can explain it more by showing the parts.

The Beav