I have a 2002 dodge cummins , I was wanting to know what I could do to add mpgs?
I have a an edge ez comp, and a super chip on the fuel saver setting.
Will an intake help? Would a larger turbo kill milage?
And will my 37 12.5 tire make much difference?
Are there better boxes or programmers for milage?

 

loose the 37's. a bigger aftermarket exhaust, a CAI will help some. One of the biggest factors is your right foot.

 

are the chips stacked? one of my buddies has an edge comp and i he doesnt get real good milage. it smokes like crazy though and if your makin smoke thats just unburned fuel so what do you expect. and yeah i would say 37 would hurt his fuel mileage for sure. edge makes a mileage max thats suppose to help but idk cause i dont know anyone that has one. im sure theres other brands that make the mileage programmers but thats the one i know of. an intake would help a little too.

 

Intake System, Exhaust System and some 40-50hp injectors will help as long as you can keep your foot out of the throttle.

 

Agreed, some RV275 injectors, intake, exhaust, and YOUR right foot make a huge difference. One thing I have noticed myself is try 'coasting' towards a red light/stop sign instead of slamming on the brakes when your 25ft from it. <-----this is if you do a lot of driving with stops. On the freeway, if your doing 70+mph I have noticed a BIG decrease. Keep it under 70 and lose the 37's, they WILL hurt mileage.

What gears are you running?

 

intake and exhaust would help.... removing spare.... and other unneccesity's

 

I'm not sure I would call this a 'unneccesity' if it's the middle of I-10 in the AZ desert at 2 in the morning on a Saturday night pulling 12,000lbs. (Speaking from experience, but I HAD my spare tire, AND it had 80 lbs of air, how many just thought of how much air is in their spare tire? )

This brings me to another idea, air up your tires, but you'll give away some of your ride quality.