Curious what you guys are getting out of a 100% stock LLY? I was able to get 400hp and 772ftlbs before rail pressure really started to drop off. This is the first Dmax I've tuned (my friends), though I've done lots of common rail Cummins. Exhaust does not smoke once the turbo lights, makes 32 psi of boost, but if I add any more duration rail pressure drops off significantly and power does not increase. I told him its time for a lift pump, ill post the tune and a data log later when get to my laptop. What are the limits of a stock LLY?