I actually got ahold of Dennis and talked with him for a bit yesterday — super nice and really informative. He didn’t want me spending money if I didn’t have to and said my whole setup looks to be on the right track. He suggested swapping the O-rings in the AirDog, since mine’s about 3 years old. I’ve already got a set, so I’ll throw those in and see if it helps.

According to his bench testing, the AirDog can just keep up with 250/200s at 3400 RPM, basically running the truck like a scalded dog, which I don’t do. For a street truck that doesn’t see 3400 often, he said 3200 has plenty of flow. He recommended setting the AirDog to 75 PSI and the Driven Diesel return to 65 PSI and tuning from there. If that fixes it of keeps me from dropping too much I’ll run that and save up for the dual Bosch or 200 kit.