I have a street/race truck with a 175hp pump with 13mm p+b, 7mm DV, 5x22 injectors, haisley5k governor springs. Since going to 13mm p+b (only recent change) pump has been down ~150 hp. I have experimented with and checked the obvious variables. Ran timing from 20*-30*, fuel supply pressure 42psi at wot, functioning afc, properly adjusted shutoff solenoid, verified rack travel. tightened gov springs tight as I can get them. I saw slight variations in performance when I changed some variables but not matter what the truck is strong staging and spooling and to about 2500rpm but falls flat and wont even got to 4000rpm under load. free revs to 5000 no problem. There is more info I hvent listed but feel free to ask. Thank you in advance for any help or advice!