Yeah but does each shot deleiver like a P-pump does?? The same amount nearly every time, and at that RPM yeah the ECM will deliver a signifacnt amount of messages to the injectors, but in the world of truck pulling where we need significant amounts of fuel injected extremely quicky, precisely, and at the time we need it, would you put your fuel system up against a sigma 8 cylinder pump for flow and rate of injection?? The limitations are all present, the ability to have complete control over the injection event is the beauty of common rail, and well HEUI too, with the P-pump being the old skool tech, I would be very impressed if your 6.4 shamed a Haisly or Schied truck at that.. When that happens I'll buy the beer.