Look around through some other forums seems to be a lot of Smarty guys here. Great for big power numbers but my opinion is the Diablo Sport Preditor for mileage. 65 on a flat highway with no load in my 2wd mega cab gets 25mpg all day long. Only other mods is a 4" straight through exhaust and a K&N intake system. Look around it's the best thing you can do.

 

dr performance fuel/ boost fooler

 

smarty gets my vote

 

Yup Smarty or Smarty Jr

 

smarty is the ticket

 

I guess this answers my question as well I was going to ask the same thing I am looking to get a 06 Dodge with a cummins myself hopefully by this winter. Question for anyone that is actually running a Smarty what kind of mpg gains should I expect to see?

 

My vote would be a simply get a good flowing muffler to replace the stock one (remove the cat too if you can).For an intake I would go with S&B. They have a great price ($289) and the flow and filter as good as it gets. Now when it comes down to programmers I am not as big of a fan of the SMARTY as most are. I prefer a PPE for a programmer. But for mileage I have seen the best results with a module from Dr. Performance. So there is my 2 cents into this question.

 

Well I suppose it's about time I updated everyone on what my brother decided to do with his ride. He pretty much settled on the same mods that 99% of the other Common Rail owners out there do, i.e an intake, exhaust and chip/module. For the intake, he went with a AEM Brute Force HD system. This is a nice piece with a large, mandrel-bent, aluminum intake duct and a huge (bear to actually get it to fit in the space alloted... but it WILL go!) dry flow filter element. Good deep, mellow sound inside the cab and allows the turbo to sing a bit without sounding like a jet inside the truck.

For the exhaust, he decided on a 4" stainless Silverline system with the straight-through muffler. I'm pretty impressed with this system, other than it uses regular u-bolt style clamps rather than band clamps that won't crush the tubing. It is not a loud system but has a great sound and absolutely NO drone inside the cab at any load or RPM.

For the engine, he went with an Edge Mileage Max module. He isn't interested in big power, just good solid reliability and an increase in MPG's. The Mileage Max claims an extra 35 hp at the wheels and 7% increase in fuel mileage. It was easy as anything to hook up, just a couple simple plug-in connections.

Against my advice though, he does not have a set of gauges to monitor the vitals. He claims since he doesn't tow or haul anything, (i know. what the hell does he need a diesel truck for then?) he doesn't need them and the new intake and exhaust will more than keep up with the minimal amount of extra fuel the Edge is adding. Maybe he's right? Oh well. Not my concern.

So what did all this get him? So far, over a period of 2 months at his new residence in Concord, NH, he has gained a solid 3 mpg's in mixed driving and over 4 on the highway (hand calculated). The truck runs considerably stronger than it did in it's stock configuration and the Edge adds enough fuel for him to even get a puff of smoke when he leans into the go-pedal. I feel this is a solid return for the money he spent to obtain his goal. A good 25% increase in his everyday fuel mileage. Improved drivabilty. Good, mellow non-intrusive sound and a bit more power to pass all those Volvos and Subarus in his area. I think he did well.

Here's his truck so far, minus the exhaust:

 

Personally I haven't really seen much gain from my Smarty. Before the Smarty when I got the truck, the best I got was 18-18.5 hand calculated and all it has was an open exhaust. I then added an Edge Juice w/Attitude and didn't really see any change. I then bumped to the Smarty, and my mileage has stayed no better than 18.5. Now at the same time I went with the Smarty I bumped from stock tires to 35" and i'm seeing pretty much the same numbers. So maybe it is getting better mileage than it would with my tires.

 

My '07 got overall 20.2mpg on a 120mile trip up into the mountains and back yesterday with a Smarty Jr. on SW2 (tow) default (rev 10.4, IIRC). That's basically unloaded with four people and 65 gallons of fuel (both tanks full to start). Refilled upon return to confirm hand calc'd mpg. Same basic truck as your bro's, QB, LB, 48RE. Has the cat deleted w/Aero muff, PSM intake mod and 35" tires.

Very impressed.