AH64ID, You posted this on the Cummins forum back in 2012. Original poster was asking about dropping rail pressure when towing. "That is how the stock RP map works, so no the BOP won't do anything if your meeting the commanded rail pressure. You can see here the dip it has as load increases at those rpms." Any chance you can send me what the image you posted? Also what does BOP stand for? Thanks Lebo.