I installed a mini maxx on my 08 ford and did a 4 in turbo back and only getting 13 or at least that what the truck saids trying to find out if any body knows what i am doing wrong

 

Moved to the 6.4L Powerstroke Diesel forum.

 

More info needed.. What truck, and what did u get before?

A 20% improvement would be pretty nice. But it's not a big raw number. as an example, I got 1.5 mpg improvement towing.. a 16% improvement. 1.5 mpg on top of the 9 I got before. so 10.5..
to get 15mpg, I would need a 66% improvement.. and that just ain't gonna happen. (if it could, the manufacturers would be doing it) and 15 still sucks..

Sam

 

First thing you're doing wrong is using the truck computer. The only way you can get an accurate read on fuel mileage is to hand fill to the same level every time, and then hand calculate. Also don't expect any major increase with the tuner. They are for power/speed not economy. So, to see if you have any increase you need to know what you had before. If you don't know that you're kinda stuck unless you want to put the DPF back on and get a baseline. If I were you I'd just quit worring about it and enjoy all that new performance. Truth is nobody is getting very good MPGs on these trucks. Some say they are but their claims are so far out of line from everyone else that they lack credability.

 

What tune are you running? Do you have the latest 6.4.27? Are you running the Hot Damn? And like Stanley said, don't expect huge numbers.

 

Allot of the numbers you heard about are highway driving numbers. Those drop when you start doing stop and go city driving as well.

So to add to the questions, what kind of driving are you doing? All highway, all city, both, loaded, unloaded.

 

I'm running wild stage will update the unit tomorrow it was getting 10.8 with dpf on but ran in to a guy in mytle beach how was in a drive thru and looked on the truck and it said 21 I would be fine with 16 power great I reset the mpg when put the mini on but thanks for all the knowledge

 

the MPG on the dash will be incorrect.. you must hand calculate.

my dash with the Spartan said 22, but I was only getting 10.5

Sam

 

My experience, the Hot Damn 300 is the best overall. But your mpg's will hurt drastically if you're not disciplined enough to stay off the accelerator.

You may also want to chat with the guys in the H&S Forum. The'll have more of the type of info you're looking for from experience.

 

Just did a short 200 mile trip yesterday in the KEM 345 tune on the way down I got 17.5 doing 75 with is at 2,300 RPMs my "lie o meter" said 17.4 and hand calculated was 17.5, on the way back up with 2,000 lb of 2 7.3 motors I got 18 flat doing 68 with is 2,000 RPMs on the nose and I was happy with the especially with 2k worth of motors in the bed. All depends on how you drive and anything over 2,000 you will start to suffer.