Those pumps will deliver 100 psi capacity, but the 400lph is @ 40psi so if you start at a 50 psi base pressure, with 20 psi boost you have an effective pressure of 70 psi. More pressure to compensate for those injectors will only make the situation worse as pump flow drops as the pressure goes up.
calculated estimations put you needing about a 105 lb per hour based on the last dyno graph I saw for your truck. I think things have changed since then so i would say it's time to step up.
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Jaime
Last edited by ElecTech; 02-20-2013 at 08:51 AM.
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