How do you turn up a 12 valve Cummins?

well the right answer is how much power do you want to make? you can add a second turbo,or just a bigger one.additionally you can increase the fuel pump pressure,new fuel injectors,flash the ecm,propane injection,methanol injection,water injection ( i know it sounds wrong,but there is such a thing).for any more ideas pick up a copy of diesel power magazine,should be in the mag rack at your grocery store by now,or in other bookstores

To turn it up you need to take to the shop and reprogram the computer. Also a bigger turbo, and larger exhaust.

And to smooth it out t a little try adding some oil and transmission fluid to the fuel about half a quirt per tank, Shh do not tell the EPA guy. This is to get around the low sulfur that just changed the fuel to.