Is anyone out there interested in fuel economy rather than "Bombing" if so we need a good forum to discuss this. The following is one suggestion on how to obtain "valid economy data": You need to determine the hand calc MPG first in the stock mode and then with the overdrive engaged or Smarty set for best fuel economy or whatever you are testing to determine valid before and after fuel economy figures. It takes time and money to really test properly. You need a course that is at least 100 miles and be a round trip course and one that you run at a time of the day where traffic will not slow you down. (the course I run is flat but ideally two or more courses would be used, one that is flat and one that has grades) Also best to run the entire course a number of times at various speeds, say 55, 65 and 75. You need to fill up at the same station at the start and finish of the course and at the same pump. You need to insure that you fill the truck tank to the same level each time. You need to run the before and after course as close together in time as possible and insure that the same conditions exist (wind, temp etc) The information I provided in a previous thread on the True Torque Power Module was obtained using the above guidelines. As I said, it is not easy to really check out a mod but anecdotal info is not adequate.

 

you should ask a moderator to sticky it in the performance section. Before you ask, the reason for putting it in the performance vs. general diesel is that fuel econonmy is directly related to performance. (performance meaning efficiancy) the more efficiant your engine is the better performance/fuel economy. If you refer to the post in the competition forum about the 830 or so HP, you will notice that that truck with that power gets over 20mpg. However, the mods to get there will never be worth it because they cost so much.

Here is a list of mods that claim to improve mpg.

Stage2 CP3
stage2 injectors
stage2 cam
tranny mods
exhaust mods
intake mods
free wheel hub conversion
programmers/boxes
nitrous
propane
water/meth

those are the main ones I can think of. Many have posted before and after dyno results and barely mention mpg. But most seem to say they do help. You have to keep in mind that while these mods get you better economy, they will also cost quite a bit. You would never be able to break even or benefit with the money you save on diesel because of the high cost of the parts/labor. I agree that we need to focus on reliablility and efficiancy as well as all out performance.