Splits make less power then singles. cause there is less fuel to inject. the split shot plunger has little holes in it and the a releaf cut when the releaf cut is lined up with the bypass hole inthe barrel fuel is not injected it is returned. then as the plunger travels further down the fuel is injected. a 160 cc stage 1 will use the same amount of oil as a stock AB/AD (tiny difference)coded injector. the only difference is the amount oof fuel injected the cause the stage 1 (AKA AC coded) is a single shot. The split and single hybrids use the same amount of oil as they use the same intensifier piston (at least in my injectors) the plunger and barrels are different one has the bypass one does not. so you get more power out of a single cause you have more fuel. I also feel that you get a more when you dont strat and stop the injection process so you get a more complete burn and more power for you CC of fuel injected.