I put a P1SC procharger on my '04-F150. Procharger claims approx 60-65% HP gain with their kit on the '04 F-150's. Assuming a base line of 300 HP (factory) for the 5.4L 3V this should mean over 150HP gain (at least). The predator flash tuner they ship though has just a 100hp tune when you get it. Does anyone have experience tuning or getting more HP out of their procharger kits.

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I think most folks on this site eventually get a good dyno tune...that or they go with a tuner, start with a canned tune, then fine-tune it via datalogging and having the tuner tweak it.

BTW - ATI's claims are at the wheels.