What if you switch to a sd2, can you run 160s then or is it not possible with the stock ecu? What about Bob Bailey maybe he can cut a chip for you.Well Eric said no chips burned for 160's ................ I wonder why 120's but not 160's ?? Not sure what I'm going to do . I'm only going to need the equivalent of 140's max and still have a cushion . Can this be "cheated" with a higher base fuel pressure setting , as long as the pumps can keep up , or will there be drivability issues at low speed / idle ??