[Joeaksa]

Matt,

Have done several mods but none of them are for performance. Also I have a 6 speed two wheel drive, so his mileage should be a bit lower, but not by much. He should be able to get in the low 20's.

First put a Edge w/Attitude monitor and chip on the puppy. Did not hook up the wiring to the injector pump nor the EGT probe (yet) as I do not care about more power, I wanted to be able to monitor the lift pump pressure. You only get a lot more power when hooking the wire to the injector pump to modify its curve.

On the mid models of the Cummins it has a Bosch VP-44 injector pump. If the lift pump (its a boost pump to get fuel to the injector pump) goes below 10 psi the injector pump eats itself and you are stranded. Oh yea, its $1500 sitting on the bench for a new pump.

The edge put a digital gauge in front of me to keep an eye on this.

Next I put a Raptor 100 gph lift pump and "drawstraw" pickup in the tank, with full 1/2" lines from the tank to the injector pump. All this does is to insure that you get good fuel flow & pressure to the injector pump. It used to be sitting at 10 psi with the stock pump, and thats the bare bones minimum. Now its 17-18 psi most of the time and when I am WOT with 20 psi boost on the turbo never less than 14 psi, so the injector pump is covered.

With the new lift pump and running a bit of two cycle motor oil in the fuel, I have seen as high as 29 mpg on the highway. Usual in town work 24-25 mpg. Remember, stock engine and on the level 1 of the Edge, so no "ya ha" increase in power. I want mileage and reliability here.

Tell your FIL to get ahold of me if he wants to but key is to keep good clean fuel coming to the Cummins, along with fresh oil and air filters. The two stroke oil also give you .5 to 1.0 mpg increase in a Cummins. With the new strain of low sulfur diesel fuel the 2 stroke oil is just a bit of insurance for everything and cost is minimal.