Like said above you can change the springs to bring up the rpms. Keep in mind you dont want to go past 4k on a stocker, Destructive torsional harmonic resonance occurs at 4100rpm and stock rods and crank will bite the dust @ 5400rpm if it makes it through the resonance!
Its not like a governor on a gasser, its not a hinderance like gasser governors are, it just pulls fuel at the rpms determined by the governor springs to limit RPMs. Its actually a real nice perk since unlike a gasser it wont just spin to the moon and blow up if you go WOT with no load! (ie driveshaft break, clutch slip, spinning out/burnouts)
I don't think you can drive one without a governor. A gasser reacts to air flow that causes a fuel change so there is an automatic smoothing of throttle response. A diesel reacts instantly to fuel change. The governor smooths that out.
I'm not sure if you quite understand how your governor works. Theoretically you could remove it but the truck probably works better with it on.
You can modify you governor, most of the time you don't need more than a stock counterwieght setup can provide on the street, but you could have the weights modified if you need more. If you really need to get rid of it you could have an ag style governor put on, but they are really tough to drive
I personally would [B]STRONGLY[/B]advise against it. I'm sure the folks at Cummins put it there for a reason. Just put a GSK in it and be done. If you go more than a 4K, you will have to put the 60 lb springs in it. The stockers can't handle anything higher than 3400-3500 rpm. The WILL break!!!
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