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Should I get the GDE tune?
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=46186		 Page 1 of 2
Author:  CRD Sport [ Fri Aug 28, 2009 7:55 am ]
Post subject:  Should I get the GDE tune?
I have the SEGR, been running it for almost a year now. I do a lot of city stop and go driving, and average about 22-23mpg in town and can get 26-27mpg on average on the highway. I don't take a lot of long trips, so even my highway #s have some stop and go in them. I know the GDE tune does what the SEGR does and more, but how much of an improvement will it be? I've already gotten used to the extra power and MPG of the SEGR. Will the GDE make big improvements in both areas? I did a little math, if I gain 3mpg with the GDE on average, at $550, it would take about 30,000 miles of driving to break even on the investment.
Author:  warp2diesel [ Fri Aug 28, 2009 11:42 am ]
Post subject:  When they crack the F-37.....
.....I will be interested, until then, I will enjoy the engine I have.
Author:  UFO [ Fri Aug 28, 2009 12:14 pm ]
Post subject: 
I think you should, so you can report back any improvement. You have the exact setup and driving as I do, so I urge you for my own self interest. :D
Author:  tcoilburner [ Fri Aug 28, 2009 1:06 pm ]
Post subject:  TUNE-IT!
I would tune-it, as long as you plan to keep it for a long time. I have dome the ORM to keep the intake clean and for the small improvement in mileage. I will be getting the tune, once I have the money. 8)
Author:  yakers [ Fri Aug 28, 2009 1:38 pm ]
Post subject: 
I expect I wuill go with the GDE when I amass a few $$$, I have the SEGR but not yet installed, so one will be available for someone who wants a SEGR. I think the GDE does more to make the CRD the way is should have been from the factory. I had an 85 VW camper which I had a Subaru engine installed; it wasn't that it 'lept tall buildings with a single bound' it just 'restored' it to the way it should have come from the factory. Maybe the GDE hot tune will crank things up a bit but for the current product I like that it does not appear likely it well stress the drive train too much.
Author:  CRD Sport [ Fri Aug 28, 2009 3:48 pm ]
Post subject: 
Hmm... Is there anyone on here that has run the SEGR for a while and changed to the GDE tune yet? It would be nice to get some before and after MPG numbers and some insight into how much more power the GDE tune adds over the SEGR, if any?
Author:  flman [ Fri Aug 28, 2009 4:05 pm ]
Post subject: 
I just bought a SEGR, had I known that the GDE would disable the EGR, I would have never bought the SEGR, my time is more valueable to me, to be tearing apart my harness, and wiring in the SEGR. I may have a SEGR for sale? $175.00, if I were younger and had more time and less money I would just put in the SEGR. I have had my years on working on cars and trucks, and I would rather keep it to a minimum.
Author:  95BadBoy [ Fri Aug 28, 2009 6:56 pm ]
Post subject: 
If it were me looking at the same question - knowing now what this tune has done for for my rig, would def recommend the tune. I was so pleasently surprised by the results and all the other things they thought out before releasing it, and also was one of the lucky first 2 or 3 to get it. 8) In this case it was good thing. :twisted:
Author:  linewarbr [ Sat Aug 29, 2009 12:16 am ]
Post subject:  I've been very pleased
I ran the ORM for a long time before getting the GDE tune. I cannot compare it to the SEGR (I had one but never installed it) but I can compare it to the ORM.

Same "dieselly sound" as with ORM, rather than the sick gasser sound.

Improved low-speed driveability. This is more seat-of-the-pants and feedback-of-the-right-foot thing, but the power delivery is more linear at low speed. From what I understand, the GDE tune remaps the ECU's accelerator position sensor, and it only gives you the full "oomph" when the pedal is to the floor.

POWER. I only really ripped it once or twice in ORM. The majority of the time, in normal driving, the GDE tune is seamless, you don't feel like you're controlling a caged beast. Very meek, so to speak. (lol) But when you drop the hammer, THIS THING GOES. Increased power is very subjective when it comes to feel, but another member did a dyno test with the GDE, if you want quantified statistics.

Increased fuel mileage. The ORM gained me about 2 mpg over stock, and the GDE tune gained me about 3 mpg over that. I run larger all-terrain tires, do a lot of high speed highway driving and then sitting in traffic. My mileage, calculated via GPS (the trip computer is totally bogus) divided by gallons to fill, is 26.4, as tracked on fuelly. I just changed to the Amsoil air filter, so I may see a little bit more.

I will be pulling my MAP sensor next weekend to see what kind of soot, if any, may still be flowing into my intake. Believe me, if I pull that thing and it is caked up, I will not be as happy as I am now. But I honestly don't expect to see soot.

All of this together is what matters. It's not the extra mpg, or the extra power, or the better sound - it's making your Jeep run the way it should have from day one. It's unlocking the total package of your motor, rather than just bits and pieces of it. If they can crack F37, I'll be happier than a pig in. . . well, you know.
Author:  bugnout [ Sat Aug 29, 2009 12:41 am ]
Post subject: 
Highly recommended. 8)
Author:  Pablo [ Sat Aug 29, 2009 2:50 am ]
Post subject: 
CRD Sport wrote:
Hmm... Is there anyone on here that has run the SEGR for a while and changed to the GDE tune yet?


Yes.

Quote:
It would be nice to get some before and after MPG mumbers and some insight into how much more power the GDE tune adds over the SEGR, if any?


I ran the tune for two tanks before regearing, adding DTT front and rear, and switching to 32 tires on steel wheels from 30.7's on the stock aluminium wheels. I ran those tanks mainly in town running errands. I got about 3 more mpg over the previous tanks in the similar conditions (about 27mpg as opposed to 24 previously). Now that I have made all these changes, I cannot compare apples to apples. In fact, until I see how inaccurate the odometer reads I have no idea what the current mileage is.

It certainly has more get up and go as the SEGR does nothing to add fuel, it just stops the EGR stupidity. The GDE tune adds fuel at key points and optimizes the turbo settings. The GDE site has dyno numbers that show the improvement over stock.

The GDE eco tune will just have to tide me over till the turbo kit comes out and finances allow... hopefully around December...
Author:  JDaPP [ Sat Aug 29, 2009 10:05 am ]
Post subject: 
I also ran the ORM for awhile and switched to GDE as my wife was not a big fan of the ORM. I would say the biggest difference I noticed is that it shifts smoother and actually feels like it drives like it should have from the factory. I saw a 2 MPG increase (my EVIC says 4-5 MPG increase but hand calcs point to 2-3). My only complaint is that the TCM died within a week of getting GDE, but I have absolutely 0 evidence to suggest that the GDE had anything to do with that and think it was a coincidence, but the timing was just odd enough to make me wonder. I have not had any further issues with the TCM following replacement and I am very happy with the tune
Author:  Joe Romas [ Sat Aug 29, 2009 10:46 am ]
Post subject: 
95BadBoy wrote:
If it were me looking at the same question - knowing now what this tune has done for for my rig, would def recommend the tune. I was so pleasently surprised by the results and all the other things they thought out before releasing it, and also was one of the lucky first 2 or 3 to get it. 8) In this case it was good thing. :twisted:


X2 :lol:
Author:  retmil46 [ Sun Aug 30, 2009 6:42 pm ]
Post subject: 
I'd wager that the GDE tune would be the best bet - not as far as replacing the SEGR - but if you're stuck with a Chrysler TC, and can't afford the time or cash to have a real torque converter installed.

If you don't already have a SEGR installed, and still have the stock TC, then the GDE tune would definitely be the cheaper route to taking care of both issues - although I still have my reservations about using the engine tune to "dance around" a weak-kneed TC.

With a lift pump, Suncoast TC, Inmotion tune, and "other" mods, I've already got everything the GDE tune is supposed to do to a stock vehicle - plus a drivetrain I can depend on.
Author:  Ripster [ Sun Aug 30, 2009 8:17 pm ]
Post subject: 
In two weeks I will be stopping in and getting the tune on site in Wixom area. I will be on a trip to Ohio and back, perfect to test the tune immediately
after 500 miles of freeway driving. I have the new pump, and warranty replacement torque converter, and shift kit minus the resistor. I generally
can get almost 28-29 at 60 on two lane roads. 41k miles on the clock. EHM, cummings lift pump, cat fuel filter, synthetic in all fluids. I will test
freeway at 70 all the way there, and same speed on the freeways to Ohio and test the improvement. I have boost and egt gauges and have benchmarks with the MAF unplugged which has been unplugged for over 20k miles. So will see if the EGTs go up or stay the same. By unplugging the MAF I realized
about 100-150 reduction in EGT temps. Will start a new thread around the 18th or 19th of September. Having been chipped in VW Tdi's with over
200k on them, I would not hesitate to chip this unit, and I am looking for high mileage on trips.
Author:  ac5501 [ Mon Aug 31, 2009 8:45 am ]
Post subject: 
I can't speak to the SEGR as I have never had it. GDE tune is pricey but worth it. Really does make the Jeep drive like it should have from the factory. Plus it is saving me at least 1 whole tank of fuel each month (about 40.00 dollars). I've had 8 fuel ups since getting the GDE. Clicking on the fuelly link in my sig line will take you to a whole slew of economy numbers if anybody is interested.
Author:  mackruss [ Mon Aug 31, 2009 10:09 am ]
Post subject: 
What is the difference then between the GDE performance tune and installing an Edge or similar kit that are available for the CRD's?

I understand the tune is a ECM remap and the kit is an install but to those out there that have done either or, what is your opinion?
Author:  jflem24 [ Tue Sep 01, 2009 11:37 pm ]
Post subject: 
Does anyone have any towing experiences to share? I am debating about have the GDE reprogram performed as well.

1. How is the CRD off the line?
2. Passing in traffic?
3. Towing? Any advantage to the GDE? I tow a 3100 Jayco travel trailer about twice a year. We get about 12-14 MPG currently and have not had any (knock on wood) trouble with mountain passes. I would like to tow more in overdrive when I can, however, most of my terrian does not allow for OD to be turned on.

Sorry if these questions have already been answered. Sounds like a lot of thumbs up for GDE which is encouraging.

Thank you,
Josh
Author:  Joe Romas [ Wed Sep 02, 2009 6:44 am ]
Post subject: 
jflem24 wrote:
Does anyone have any towing experiences to share?
1. How is the CRD off the line?
2. Passing in traffic?
3. Towing? Any advantage to the GDE? I tow a 3100 Jayco travel trailer about twice a year. We get about 12-14 MPG currently and have not had any (knock on wood) trouble with mountain passes. I would like to tow more in overdrive when I can, however, most of my terrian does not allow for OD to be turned on.
Thank you,
Josh


We've towed our 3500# Casitia on the same 1500 mile trip twice this year. Both before and after the GDE tune. While towing I leave OD on as much as possible and there is less shifting going on now since it has more power. But we still need a better TC and TCM programming.
As far as mileage goes while towing our last trip was 18-20 MPG depending mostly on fuel. Previously it was in the 16-18 range. There's a Flying J in Va that has 45 cetain and that tank gave me the 20 figure. I try to maintain the speed limit and in mountainous areas it's now possible more often. However when I do need to turn the cruise and OD off third lockup seems to struggle less now to maintain 60 mph then it did before.
The engine just plain all around runs better :lol:
Author:  flman [ Wed Sep 02, 2009 4:27 pm ]
Post subject: 
Just got mine with the ECO tune back today. So far so good. The engine starts much quicker then it ever has, sounds more powerful even at idle. I notice it does not smoke up the garage like it used to. The EVIC is reporting 3 more MPG, and I only drove it around locally, all the while punching the accelerator :twisted: I can feel it is much more responsive and more powerful. I have never got so much gratification out of spending $550 dollars, and I got so much more power and torque, with out even getting my hands dirty. Now if I can get a similar tune for my 02 TDI? Any one have a recommended tune?
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