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Discussion Starter #1 (Edited)
Hello all, Thought I'd share a video I just did this last weekend where I was able to hit 30+MPG in my lifted ecodiesel. I'm very happy about this. I have the GDE Hot Tune and the SFT TCM Tune (sofakingtuned.com). I have a 6" Fabtech Lift and 37" Nitto Grappler tires! If you want to get tuned, I fully recommend either of these tunes. Both companies offer TCM and ECU tunes. The benefit of SFT is they can tune your engine and your transmission via the OBD port and you don't have to send in or swap your ECU. Huge bonus there.

Before my Transmission tune, I was getting around 19-23mpg pretty consistently. I made the same trip I did in the video and hit 25mpg, which is still pretty awesome considering my lift and 78lb 37" tires. But with the transmission tune, I'm getting about 4-5mpg better on average! Totally worth it to me.


I'm happy with my truck. Probably the best vehicle I've owned. Time will tell! :)
 

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It's been my experience that you don't get a high average speed like 68mph unless you reset your mpg once at highway speed.

Your average isn't over 2k-3k miles, it resets a lot more often than that. It's more like the most recent 200mi.

Who does the SofaKing programming? What are their qualifications?
 

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Discussion Starter #6
It hasn't reset the mpg for several tanks, and I have hand calculations on fuely to back it up. The mileage resets, as does the average speed and mpg at the same time. 310 miles, 30.6 mpg and 68mph is the average. There isn't a way to reset them individually. If you would like to go on a ride along with my when I'm back east you can sit in the truck and watch. You can also do the same thing in your truck and prove to yourself.

Also, neither SFT or GDE, asked me to post anything here. I'm very happy with my current setup and thought I'd share. Chris tuned me from SFT, and I haven't received any tunes from Jimmy. GDE is my engine tune.

I did not come on here to sell anything and I do not feel the need to defend any tuner. I'm just sharing what I have experienced and that I am very happy with what I have.
 

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Discussion Starter #8
My rear diff is 3:55.
 

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Question, how are they able to tune the ECU via a flash tool without the customer sending in the ECU? My understanding, based on what GDE has posted, is that an OBD programing was not possible for the ECU at this point. I know they recently posted about this being a possibility in the future. I would love to hear from those in the know. As always, thanks for the thoughts and advice boys.
 

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Question, how are they able to tune the ECU via a flash tool without the customer sending in the ECU? My understanding, based on what GDE has posted, is that an OBD programing was not possible for the ECU at this point. I know they recently posted about this being a possibility in the future. I would love to hear from those in the know. As always, thanks for the thoughts and advice boys.
A couple of tuners now offer it. Vivid, PPEI, etc. GDE has said there’s is basically reading but due to the upcoming AEM flash it might change things with the handheld.


Sent from my iPhone using Tapatalk
 

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Discussion Starter #12
A lot has to do with the technique. As mentioned in the video, I come from a background of hybrid and electric cars. Hypermiling is pretty much how I drive by nature now. I kept the speed close to 75mph, but would slow down going up hill by using my cruise control and clicking the down button every time the mpg dropped below a certain amount in order to keep it up, occasionally I got into the 65-70mph range when no one was behind me. And then I sped up gradually on the down hills.
 

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It hasn't reset the mpg for several tanks, and I have hand calculations on fuely to back it up. The mileage resets, as does the average speed and mpg at the same time. 310 miles, 30.6 mpg and 68mph is the average. There isn't a way to reset them individually. If you would like to go on a ride along with my when I'm back east you can sit in the truck and watch. You can also do the same thing in your truck and prove to yourself.

Also, neither SFT or GDE, asked me to post anything here. I'm very happy with my current setup and thought I'd share. Chris tuned me from SFT, and I haven't received any tunes from Jimmy. GDE is my engine tune.

I did not come on here to sell anything and I do not feel the need to defend any tuner. I'm just sharing what I have experienced and that I am very happy with what I have.
It would seem to me your hand calcs would be a lot different than the EVIC average unless you have recalibrated your speedo for the oversized tires.
 

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Discussion Starter #14
As mentioned in the video, I re-calibrated the speedometer for the tires, but at 75mph its still off by 4mph. So, the liedometer is still lower than it would be but its closer to my hand calculations. I plan on switching to A/T 35" tires after these wear out that are about 16lbs lighter each tire. That should improve the mileage.
 

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I was pretty much resolved to go with GDE as soon as the new litigation flash has been completed but this is an interesting alternative. And $1k for ecm and tranny update in OBD2 downloadable form is alluring. On their site, the original tune is stored in the ecm so I assume it’s recoverable. Dyno showing 289 RWHP and a bump of 70 lb/ft of torque. My only concern is the fact that it appears their experience with Ecodiesel only goes back about 6 months.
 

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As mentioned in the video, I re-calibrated the speedometer for the tires, but at 75mph its still off by 4mph. So, the liedometer is still lower than it would be but its closer to my hand calculations. I plan on switching to A/T 35" tires after these wear out that are about 16lbs lighter each tire. That should improve the mileage.
Sorry, I didn't bother watching the video since the MPG claim was so high...
 

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Discussion Starter #17
I believe the dyno numbers are from a stage2 tune, just fyi on that. I can't speak for the ECU tune from them as I do not have one. But the transmission tune is great. The temps are down compared to before. I saw the transmission hit 258 degrees once backing up a trailer because it was slipping so much, and the tune made reverse so much better, especially with a trailer. Its not a slush bucket anymore, haha. I'm pretty happy with the tune. But, can't speak for the ECU. I think they have many people running the ECU tune now, so you could probably find someone that has one and ask them how its been.
 

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Haven’t been able to find much info other that reviews posted on their site. I’m probably several months away pulling the trigger and plan on monitoring any reviews I can find between now and then. OBD2 loadable is a big plus for me. But of course GDE may catch up by then!

Yep, you’re right. That was stage 2 specs. Stage 1 was about 10 hp less.
 

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Discussion Starter #19
Sorry, I didn't bother watching the video since the MPG claim was so high...

Well thats just silly. :) But hey, I can't force you to believe anything. Don't cast your eyes on the serpent because of non-belief. ;)
 

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Sometimes you just gotta call a spade a spade.

Yes you can hypermile and get some incredible mileage out of these trucks!

37 inch tires, a 6 inch lift, and 75 mph(which according to you is real world 79 mph) is not in the realm of hypermiling... at all. I think your full of it.
 
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