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Linewarbr's GDE experience
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=44462		 Page 1 of 1
Author:  linewarbr [ Wed Jun 24, 2009 9:37 pm ]
Post subject:  Linewarbr's GDE experience
Just got my ECU back and re-installed about 15 minutes ago.

Let me first say, as we do here in south Louisiana. . . YES INDEED!! After hooking everything back up, I went for a little ride. Even from when I first put it into gear, I noticed a difference. The sound is very much like the sound of the engine with ORM, more "dieselly," but much smoother at the same time. Even pulling out of the driveway and accelerating up the street, it was just more responsive, more eager.

Then I took it around the corner to a highway and turned 'er loose. I mashed the go-pedal and the tach pegged over to redline and blip-shifted to second right about the time I looked down at it. Now she's not a drag racer now, but much improved. I did a U-Turn, came to a complete stop, and did it again - same result. Very good initial seat-of-the-pants impression. I'm not saying that it's like the difference between a small 4-cylinder gasser and a Viper, but the difference is noticeable. Definitely not only comparable to the ORM. Plus it's nice to not have the CEL on.

One other thing I noticed is that shifts and power delivery through the transmission seems more smooth, less intrusive. At slow speeds, my trans seemed to not know whether to stay in first or upshift to second before, now, it was seamless going down the street. Also, since the highway is 55 mph limited, when I hit 60 I backed off all the way from WOT. Before, it was as though the truck immediately slowed after lifting off the accelerator, whereas now it actually seemed to coast. Keep in mind that this is brand new to me, so take what I say with a grain of salt for sure.

I will post again with mileage figures. Before the tune (and disconnecting my battery erased the EVIC) I was getting about 26.5 by the EVIC, 23.5 calculated by hand. I will have a pretty fair idea of new mileage by Friday, then I am taking a 400-mile trip which will give a really good idea. I do a lot of highway driving, so my numbers will be overall mpg.

Last, but DEFINITELY not least, if you are going to do this tune or any tune that requires removal of your ECU, UNBOLT THE BRACKET, NOT THE ECU. That one tip made the 2-hour removal into a 10-minute re-install. Two 10 mm nuts with ample ratchet-head space are much better than 4 8mm nuts without. Untold thanks, bugnout.


**MILEAGE EDIT 6/25/09 @ 6:45 am CST**
EVIC showed 32.9 mpg on the Interstate this morning during my 50-mile commute to work. I drive 80 mph (via GPS, not the speedo) when I can, and I also stopped at a store to get a breakfast sandwich and left it idling for ~4 min while I went in. After exiting the Interstate, I spent 15 minutes in slow-speed, stop-and-go traffic trying to get into the plant and my EVIC readout only went down to 32.7 mpg. That's roughly a 6 mpg increase via EVIC, which should translate to 5.5 or 6 mpg increase when calculated by hand. I am running Shell ULSD and I add 6oz of PowerService (silver bottle) and 6 oz of TC-W3 Quicksilver 2-stroke oil every time I fill up.

Very impressed. I will have to wait till I fill up to hand-calculate mpg, and will post after I do.


**MILEAGE EDIT 7/27/09 @ 12:07 pm CST**
EVIC continues to be way off of hand-calculated mileage. Averaging the hand calculations over the past month, I have gained an average of 3mpg over what I was getting before the tune. As stated earlier, if I am on the Interstate (90% of my driving) I am spinning 2400 rpm or so and going 80 mph (via GPS, 84 or so on speedo), and I have larger all-terrain tires on. I was at an average of 23.23 mpg running ORM before the tune, new average over the past month is 26.40 mpg. That mileage is calculated using the trip computer on my Garmin - not the trip odometer on the EVIC console - divided by gallons at fill-up.

If I went 1800 rpm at 64 mph or so, I bet I could get 30 mpg easy, if not more. I am very pleased with the result, and looking forward to the turbo kit.
Author:  bugnout [ Wed Jun 24, 2009 10:02 pm ]
Post subject: 
:D :D :D :wink: da nada
Author:  liberty2.8 [ Thu Jun 25, 2009 8:00 am ]
Post subject: 
Linewarbr, now all you need are a few exhaust modifications (if you know what I mean) ,and you'll be rockin'. Let me know if you are over my way anytime soon and vice versa. I'd like to compare the Edge performance to the GDE. I think you will have the edge (pun intended).
I'll bet you had an evil grin from the time you picked up your package until you cranked it for the 1st time 8)
Author:  linewarbr [ Thu Jun 25, 2009 8:07 am ]
Post subject: 
liberty2.8 wrote:
I'll bet you had an evil grin from the time you picked up your package until you cranked it for the 1st time 8)


:twisted: :twisted: :twisted: :twisted:
Author:  linewarbr [ Thu Jun 25, 2009 11:36 am ]
Post subject: 
I had some concerns about how the tune would affect my EGT's, boost, and rail pressure, so I fired off an email to GDE and received an immediate response. Text is below.

Darren asked:
"Did you install any gauges on your test mules to check EGT’s, Rail Pressure, and Boost Pressure? I am a little concerned that the new performance and higher boost could raise these to potentially harmful levels. I would like to verify what, if any, change that you experienced in your testing."

GDE responded:
"We had our vehicles fully instrumented for the development and validation testing. This included turbo speed sensors, EGT, boost, rail and just about everything else. We limited the peak boost based on keeping the turbo speeds within the safety margin and rail pressure is limited based on the hardware limitation. The EGTs are actually lower at peak power than with the production configuration as we advanced the timing of injection. This sends more heat to the coolant and less out the exhaust. In trailer tow situations with ambient temps above 100 F when the coolant approaches the limits, we back off on the timing advance to reduce coolant heat rejection and also reduce peak fueling levels to limit EGT.

In normal cruising you can notice the turbo more as the boost is higher, the speeds went from around 120,000rpm to 140,000rpm and about 155,000rpm in high altitude. The turbo will never go over 200,000 in any condition and those peaks are only at WOT conditions. The validation, development trips along with 5 engineers working full time on this were the main reason our product costs more as we need to begin to cover the overall costs. I hope this puts you at ease. Just to note, we have accumulated over 50,000 miles on two KJs with the tune and have had not issues to date."

I still would like to install gauges, just. . . well, just because. Who doesn't want an A-Pillar full of gauges? 8)
Author:  chrispitude [ Thu Jun 25, 2009 12:39 pm ]
Post subject: 
Very open with information. Good stuff. I like the attention to towing.
Author:  dieselbum [ Thu Jun 25, 2009 2:54 pm ]
Post subject:  I think I mentioned...
I have written more then once their mules had sensors running all over the engine compartment more then once...
Author:  geordi [ Thu Jun 25, 2009 4:40 pm ]
Post subject: 
Turbo speed sensors? Can we get those too?
Author:  mattybcrd [ Thu Jun 25, 2009 4:55 pm ]
Post subject: 
anybody know the actual boost increase(psi)? im not even sure what stock boost is as i have only owned my crd for 2 weeks now..
Author:  KJ 119 [ Thu Jun 25, 2009 9:08 pm ]
Post subject: 
Congrats LW.My diesel's got GDE also.


Green Diesel Envy :x
Author:  shaggyislandboy [ Sun Jul 12, 2009 8:05 pm ]
Post subject: 
Linewarbr!

Do you have any updates of interest for us???
Inquiring minds.....
Author:  linewarbr [ Tue Jul 14, 2009 8:51 am ]
Post subject: 
Nothing really new to report yet. Still enjoying the extra torque and hp. My mpg has increased at least 3 mpg, and that's with the heat and running the A/C constantly. I've been waiting to do several tanks and report back on an average mpg gain, but as of now it is at least 3 mpg.

How was Eglin?
Author:  Pablo [ Sat Jul 18, 2009 5:24 am ]
Post subject: 
mattybcrd wrote:
anybody know the actual boost increase(psi)? im not even sure what stock boost is as i have only owned my crd for 2 weeks now..


I have not been watching it during WOT runs, but I will and will report back if I notice it is higher than stock. Maximum boost for the stock tune is around 20psi of consistent boost. The turbo boosts much more than it did before at cruise (10-15psi instead of 5-10). The EGT are lower than stock.
Author:  linewarbr [ Mon Jul 20, 2009 3:12 pm ]
Post subject: 
Pablo wrote:
mattybcrd wrote:
anybody know the actual boost increase(psi)? im not even sure what stock boost is as i have only owned my crd for 2 weeks now..


I have not been watching it during WOT runs, but I will and will report back if I notice it is higher than stock. Maximum boost for the stock tune is around 20psi of consistent boost. The turbo boosts much more than it did before at cruise (10-15psi instead of 5-10). The EGT are lower than stock.


Greendiesel answered this question on their forum - link: http://www.greendieselengineering.com/f ... ist/7.page
Author:  Pablo [ Mon Jul 20, 2009 8:47 pm ]
Post subject: 
Their reply is consistent with what I have seen. I do see up to 26psi stock, but it was only during rapid acceleration. 20 psi is maximum sustained stock and it is the max I see now as well. It gets to it more often, however.
Author:  linewarbr [ Mon Jul 27, 2009 1:15 pm ]
Post subject: 
New mileage edit in the original post.
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