GDE Tune (Green Diesel Tune) - Page 54 - JeepForum.com

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post #796 of 1267 Old 07-09-2013, 10:41 AM
Xmind
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What kind of mpgs are you guys seeing at highway speeds with the ECO or Hot tunes?

I am more interested at 80 MPH stead state MPGs as that is what I run 80% of miles at. From the few months that I've had the Jeep, I see roughly the following with my stock CRD:

MPH MPG
65 25
70 24
75 23
80 21


'07 GC CRD QDII, EHM, GDE ECO, DPF & intake rez delete, Paramount Perf Valve Body, Roof drain mod
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post #797 of 1267 Old 07-09-2013, 10:58 AM
Zlartibartfast
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running Eco I get 29 @ 45, 26 @ 60, 24 @ 70. I tested @ 85 MPH once and got about 21 w/the tach near 3K RPM. Stock tire size, RWD, about 35PSI cold (close to 39 PSI doing 85 MPH).

My Hot numbers are about that same from 60 MPH on up but below 60MPH Hot MPG's are about 1 to 1.5 down from when I am running Eco
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post #798 of 1267 Old 07-09-2013, 02:54 PM
SSF556
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At 70mph I see about 23mpg....32" tires and lifted.

Silver WK Club Member #1
2008 CRD QT2
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post #799 of 1267 Old 07-09-2013, 03:30 PM
quicksilverado
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50/50 hwy/city I average between 24-25. 60 mph = 28-29
65 mph = 27-28
70 mph = 26-27
75 mph =25-26
Tires are 32", 40 psi, no lift.

07 Grand Cherokee Limited CRD 4X4 GDE tune
00 Silverado 10 sec work truck
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post #800 of 1267 Old 07-09-2013, 11:58 PM
sshaughn
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Quote:
Originally Posted by quicksilverado View Post
50/50 hwy/city I average between 24-25. 60 mph = 28-29
65 mph = 27-28
70 mph = 26-27
75 mph =25-26
Tires are 32", 40 psi, no lift.
I don't know how you guys are getting those numbers with your GDE tune. Hot or Eco I never posted numbers that good. I am pretty light on my foot too.

2008 WK Overland 4WD CRD 3.0L, QD2, Green Diesel Engineering Hot-Tune, MBRP Exhaust, CB Engineering Turbo Resonator Delete Pipe, Kolak Addco Rear Sway Bar, K&N Air Filter, Propel Fuels B20 Biodiesel
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post #801 of 1267 Old 07-09-2013, 11:59 PM
sshaughn
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Makes me think, is my fuel filter is clogged or something?

2008 WK Overland 4WD CRD 3.0L, QD2, Green Diesel Engineering Hot-Tune, MBRP Exhaust, CB Engineering Turbo Resonator Delete Pipe, Kolak Addco Rear Sway Bar, K&N Air Filter, Propel Fuels B20 Biodiesel
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post #802 of 1267 Old 07-10-2013, 03:53 AM
Hendrix9
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Quote:
Originally Posted by sshaughn

I don't know how you guys are getting those numbers with your GDE tune. Hot or Eco I never posted numbers that good. I am pretty light on my foot too.
Makes me think "where do they drive that it's so flat?" haha. When was the last time you changed your fuel filter though? I try to do mine every other oil change or so.



How many miles have you guys put on your CRDs with the hot tune? Now that there's a fix for the high rpm hang I'm itchin' for it but am nervous about reliability, mostly of killing the trans.

2007 CRD QDII
2010 Jetta Sportwagen TDI 6MT - hoping it gets bought back!
2004 QD 4.7 GC- lawn ornament waiting for some TLC
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post #803 of 1267 Old 07-10-2013, 06:29 AM
Zlartibartfast
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I try to keep my RPM's as low as possible, but high enough to stay in the power curve. It's unfortunate that the most efficient speed from my CRD is 45 MPH, but I live in an area where I do a lot of driving at that speed - and with very few hills. So I have an advantage there.

I'm super finicky about my tire pressure. I removed my radio antenna. I avoid using the brakes. I try to use a "pulse and glide" style of driving but with the auto it really doesn't work as well as with a manual. I change my fuel filter every other oil change. I add Power Service to every tank. I"m thinking of bigger tires - from 29.5" to 31" diameter would theoretically gain 5% MPG if rolling resistance does not increase.

Hypermiling in a Jeep - yeah right.....
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post #804 of 1267 Old 07-10-2013, 06:37 AM
SSF556
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Quote:
Originally Posted by quicksilverado View Post
50/50 hwy/city I average between 24-25. 60 mph = 28-29
65 mph = 27-28
70 mph = 26-27
75 mph =25-26
Tires are 32", 40 psi, no lift.
You must have the special super edition CRD to be getting those numbers....in some aspects it is impossible, 5 speed transmission, gearing, 32" tires, aero of a brick. At 75 mph you are turning well over 2500 rpms...again on paper it is not possible.

My totally stock Mercedes ML350 with Bluetec, 7 speed transmission, low rolling resistance tires, better aero...26mpg average

There is a member on here who has done a rear gear swap on his 2wd CRD with the ECO tune and I believe he may get those numbers, but again he has done a gear change.

Scratching my head on this one....

Silver WK Club Member #1
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post #805 of 1267 Old 07-10-2013, 08:58 AM
BAH101
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He would get those numbers...if he was using imperial gallons

2008 CRD QDII, OME HD, Pintlers wheels with 265/70/17 Goodyear Silent Armour's, Jeepinbyal UCA's. 4XGuard Front guard, Side Guard, belly guard, Matrix HC. GDE ECO Tune w/ delete.
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post #806 of 1267 Old 07-10-2013, 10:52 AM
Tuco
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The threads about mpg are funny. I find that most numbers are questionable no matter what vehicle or forum. Im not going to spend $900 for a small mpg bump. I dont have to because I found a way to get huge mpg increases, better than GDE tune and nore environmentally friendly.

I got more than 25% mpg increase with just a few modifications.

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Just go to N. California and get a long hair, they will do just about anything for a 6 pack. We got huge MPG increases in our 78 Scout. Now we just need to look for similar motor for our Jeep.


07 WK CRD Limited
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post #807 of 1267 Old 07-10-2013, 11:28 AM
fishinbama
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My wife and I average between 26-29 in about 70/30 mixed highway to city driving. Jeep is doing great. She never turns off the a/c. Usually lets it idle to cool off first. It's very hot here in South Alabama.
Love the way our Jeep runs with the eco tune/with dpf delete. The gear change is awesome as well. It truly is the way Jeep should have made all the 2wd vehicles.
With mileage though, nothing is beating my 13' Passat tdi 6 speed. It gets 45-50 but is kind of weak compared to the Jeep. The Jeep is so powerful with this Feels much more powerful than the 5.3L in my truck.

2007 limited crd 2wd, 3.07 ratio, GDE eco tune, dpf delete, BuilderBill valve body
2013 VW Passat tdi, 6m
2005 GMC crew cab 5.3
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post #808 of 1267 Old 07-10-2013, 11:54 AM
Zlartibartfast
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Quote:
Originally Posted by Tuco View Post
........
Just go to N. California and get a long hair, they will do just about anything for a 6 pack. We got huge MPG increases in our 78 Scout. Now we just need to look for similar motor for our Jeep.





yeah but how much beer does it take per month?

In my neighborhood beer costs more than diesel

and them long-hairs tire pretty quickly in the hot summer

how do you hook up the turbo?
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post #809 of 1267 Old 07-10-2013, 12:29 PM
sshaughn
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Quote:
Originally Posted by Hendrix9 View Post
Makes me think "where do they drive that it's so flat?" haha. When was the last time you changed your fuel filter though? I try to do mine every other oil change or so.

I changed it about 12,000 miles ago...I have been running b20 biodiesel but maybe it cleaning out residual Left in the tank from regular diesel? I've been running b20 for 15,000 miles or so.

How many miles have you guys put on your CRDs with the hot tune? Now that there's a fix for the high rpm hang I'm itchin' for it but am nervous about reliability, mostly of killing the trans.
I've run about 10,000 miles on the hot-tune so far, I just recently got the updated fix for that tune.

2008 WK Overland 4WD CRD 3.0L, QD2, Green Diesel Engineering Hot-Tune, MBRP Exhaust, CB Engineering Turbo Resonator Delete Pipe, Kolak Addco Rear Sway Bar, K&N Air Filter, Propel Fuels B20 Biodiesel
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post #810 of 1267 Old 07-10-2013, 04:25 PM
quicksilverado
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Quote:
Originally Posted by scootr29 View Post
You must have the special super edition CRD to be getting those numbers....in some aspects it is impossible, 5 speed transmission, gearing, 32" tires, aero of a brick. At 75 mph you are turning well over 2500 rpms...again on paper it is not possible.

My totally stock Mercedes ML350 with Bluetec, 7 speed transmission, low rolling resistance tires, better aero...26mpg average

There is a member on here who has done a rear gear swap on his 2wd CRD with the ECO tune and I believe he may get those numbers, but again he has done a gear change.

Scratching my head on this one....
Smyrna Ga to Palm Coast Fla in the spring I got 27.7 mpg on the trip down at 70 mph. No stops and no traffic jams. The same trip on the way back was 27.4 mpg. Another trip from Smyrna ga to Bradenton Fla It got 25.6 mpg going down and 26.4 on the return trip. Both ways at 70 mph. The second trip was with a/c running. The first trip was without a/c. A few areas along the way the speed limit drops to slower speeds for congested areas or construction. So in all fairness the over all avg mph was probably closer to 65 mph. I don't accelerate fast and drive like an old fart. All averages are hand calculated. I filled the tank before getting on the hwy and stopped to fill the tank immediately after getting off the hwy on both trips. So there is virtually no stop and go traffic in these trip figures. I can't explain why it does so well, but I am not gonna complain about it. I got a bit over 25 mpg at 70 mph when the GC was stock.

07 Grand Cherokee Limited CRD 4X4 GDE tune
00 Silverado 10 sec work truck
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