I think there are a few things here.
A. You are making it too complicated here.
B. Alex from VMP has already mentioned tuners basically not using the DI system for added fuel needs at all. And even more importantly its cheaper and easier to address fuel needs on the port side.
C. You dont really need bigger lobes you would need a DI fuel pump that flows more. Look at the ecoboosts for example they can just change the DI pump to increase fuel capacity while still using STOCK cams. I am 100% confident the Gen3 Coyote will be the same or go back to what I already said and rely on the port injection for added fuel needs.
D. It will be interesting to see what happens with aftermarket 2018 gen3 coyote cams my money is the fuel lobe profile stays the same and people just use same DI pump or aftermarket pump that flows more.
Doesnt the comp stage 3 have 2.5% more DI lobe built in?Just a couple of thoughts, just because tuners are using the port side for added fueling needs doesn't mean there isn't any advantage to adding fuel through the DI injectors. A different lobe profile can increase fuel flow even without a higher flowing DI pump. A higher flowing pump would be best, but the GM guys drive the factory pumps harder on a regular basis with no issues. if you could add all of the additional fuel through the DI side you could make more power. How much? Likely not enough to justify spending the extra money to do so. If it was worth an additional 5-10 hp with no downside to using a different fuel lobe that would be a pretty good gain on top of what a set of cams will give.
Your car already comes with racing cams...Anyone working on cams, I'm wondering if fuel lobe size can be increased for more fueling on the direct injection side and if higher intake lift/duration can be achieved for higher rpm power. like 8500 rpm shifts with a cobra jet setup (once tuning for the throttle bodies has been figured out).
I can call comp on monday, but I figured I'd ask first here.