Originally Posted by BLKSVT
You can keep the MDS on if you want, Like mentioned it's about a 2mpg drop if you turn it off. I have tried it both ways and thats my experience, I use a predator tuner and like it I know run with MDS off and throttle sensitivity turned to +20 and the correct tire size on the canned 93 tune.
Originally Posted by CdnoilRAM
I am heavily modified (heads, cam, TC, intake manifold swap, 1 7/8" LT headers, e-cutout, gears) and I keep the MDS for long road trips but I do turn it off when around town because my tranny seems to be hunting for the right gear when I'm at around-town crusing speeds currently. A good tuner can get your mods tuned properly and still allow the use of MDS. Around town my MDS never kicks in, but that's because of my lead foot, however, or the highways it definately makes a difference, and I've seen up to 21mpg on long trips and getting 750km to a tank of gas is impressive considering around town I can burn through a tank in 500kms.
I had given up on getting responses, lol. First time I had checked back in about 5 days.
Thanks, to each of you, I appreciate the input.
Is there a basic consensus regarding "the best" tuner for the 5.7L Hemi
...at least for my purposes? (Primarily not seeking any HP/torque boost, just wanting to improve upon gas mileage)