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  #265  
Old 08-12-2015, 09:16 PM
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Re: green diesel engineering tune

Quote:
Originally Posted by stician View Post
This is a good one. GDE tune is very well engineered. Chrysler should bring them in house but they did that once pre bankruptcy pre Fiat and stiffed GDE on a lot of money. GDE can do more but limited by the size of the turbo in the CRD.
The positive feedback in this forum combined with the level of testing that appears to have gone into the GDE tuning is what's given me the confidence to make such a change to a one week old vehicle.

Thanks to stick an & farfromovin in particular for sharing your insights.

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  #266  
Old 08-13-2015, 11:32 AM
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Re: green diesel engineering tune

After about 1,700 miles on my 2015 Summit EcoDiesel, I pulled the trigger on a GDE tune as well. Sure the extra power will be great, but it was the reduction/elimination of the diesel soot via the EGR that was my primary reason for doing so.

I had a great 2009 BMW 335d with a six cylinder twin turbo diesel, but the two weak points were the DEF system and the excessive carbon build up (CBU) issue. I think mine was good running Stanadyne and Amsoil cetane boost, but it was a concern that directly affected the ability of the engine to last as long as it should.

I went with the ECU swap method, as that is most convenient; I trust the ECU will be in good shape.

I've got a 2013 GTI with an APR stage 1 ECU tune with just under 14k miles on it, had the tune installed a couple of weeks after I got it. I have had zero issues whatsoever with the car and the tune, and love the extra power and torque, as if it came from the factory that way.

I look forward to the peace of mind, extra power, and increased mileage of the GDE tune!
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  #267  
Old 08-13-2015, 12:52 PM
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Re: green diesel engineering tune

Great insight. I have an oil change / def service coming up. I'll ask them to flash my TCU since the shifting is jerky. Once I get it back. I'll order the hot tune and core my ECU

I have 11k on my truck. Any recommendations on cleaning up carbon buildup????


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  #268  
Old 08-13-2015, 06:28 PM
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Re: green diesel engineering tune

Hi Gang,

By way of update, I installed my GDE Hot Tune on July 18th and have driven just about 1,000 miles since so I figured it was a good time for an interim report.

First on fuel economy: As of yesterday, I went through my first full tank of diesel exclusively on the GDE tune and was very impressed with the results. My trip computer read 600.5 miles when I arrived at the pump, and the Jeep took 22.6 gallons of fuel, resulting in a hand-calculated 26.53 MPG. If you've seen my prior posts, I've tracked each tank and hand-calc'd my MPGs since day 1, and I've averaged about 23.6 MPGs over the 15K miles since I purchased the Jeep. Needless to say, an immediate jump of nearly 3mpg is impressive. The best prior tank I'd ever experienced was 27.2mpg and that was a nearly all-highway trip where I was making an effort to maximize economy. This tank was 30% highway and 70% city driving, so the results are very encouraging.

I'm also going to continue to track the EVIC MPG numbers to compare to the hand-calc'd numbers. On this particular tank, because the last 180 of the 600 miles was an all highway trip, the EVIC suggested that I was averaging 29.1 MPG at the time I filled-up. Given the EVIC uses a 300 mile rolling average, it's never been all that accurate, but this particular tank was a bit unique so I'll keep an eye on that. Instant economy readouts during that highway drive were consistently over 30mpg, at between 75 and 80mph, where previously I'd only see 20-25 at those speeds, so I'm excited to see what my first long all-highway road trip looks like.

Regen: My first regen occured at about 675 miles after the initial GDE install regen. I spend the majority of my time in stop and go traffic, so I was actually very happy with that result. It took roughly 10 miles of driving to complete the process, and having the notification pop-up was great because I was able to just go a few extra exits on the highway and let the process complete itself before pulling off the highway.

Performance: Given the fuel economy results mentioned above, I'm incredibly impressed with the increased performance. The ability to cruise on the highway in 8th gear and accelerate from 55-80 without a downshift is what a diesel engine is all about. Around town, the ability to accelerate into traffic and change lanes without advanced planning and a bit of anxiety is great too. Some turbo lag still exists, but it's drastically reduced.

DEF Gauge: While not a big deal in the grand scheme of things, this is the one issue I'm still unclear on because my DEF gauge did not properly reset after I installed the tune. I was reading just under 1/4 tank prior to the tune, and it reset to the GDE default of just over 1/2 tank after install. I waited a few days and the gauge did not change back, so I added 2.5 gallons of new DEF and the gauge then jumped up to over 3/4 full. Theoretically, if I was just below 1/4 tank prior to install (roughly 2 gallons) and I added 2.5 gallons, the tank should have been sitting around 4.5 gallons, or just over 1/2 tank, but it's hard to tell exactly what's going on. I know I have plenty of DEF to make it to my 20K service which is a couple of months out, so I'll simply top the tank off completely at that service and regardless of the gauge reading I can track based on the 10K service interval moving forward.


Still two big thumbs up for GDE.
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  #269  
Old 08-13-2015, 07:32 PM
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Re: green diesel engineering tune

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Originally Posted by frall9 View Post

DEF Gauge: While not a big deal in the grand scheme of things, this is the one issue I'm still unclear on because my DEF gauge did not properly reset after I installed the tune. I was reading just under 1/4 tank prior to the tune, and it reset to the GDE default of just over 1/2 tank after install. I waited a few days and the gauge did not change back, so I added 2.5 gallons of new DEF and the gauge then jumped up to over 3/4 full. Theoretically, if I was just below 1/4 tank prior to install (roughly 2 gallons) and I added 2.5 gallons, the tank should have been sitting around 4.5 gallons, or just over 1/2 tank, but it's hard to tell exactly what's going on. I know I have plenty of DEF to make it to my 20K service which is a couple of months out, so I'll simply top the tank off completely at that service and regardless of the gauge reading I can track based on the 10K service interval moving forward.


Still two big thumbs up for GDE.
Theoretically with your GDE tune, you should now be able to run it dry and it at least won't leave you stranded, right? What if it indicated more than what was actually in the tank, would it update and synchronize correctly, when you actually ran out?
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  #270  
Old 08-13-2015, 09:39 PM
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Re: green diesel engineering tune

I'd be careful topping off your DEF. I've put 4k miles on it and only went through about 1/8th to 1/16th tank...
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  #271  
Old 08-13-2015, 09:55 PM
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Quote:
Originally Posted by farfromovin View Post
I'd be careful topping off your DEF. I've put 4k miles on it and only went through about 1/8th to 1/16th tank...
The average age of DEF in your tank approaches your refill interval time (as a limit).

If only FCA engineers had made a DEF tank that wasn't painful to drain...
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  #272  
Old 08-14-2015, 08:42 AM
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Re: green diesel engineering tune

VW dealers sells half-gallon DEF bottles (called Kruse bottles pronounced cruiser) with a neat little cap on it, lists for $8.50 and my local dealer will sell it for $6.80. Can also get this at Audi, Porsche, BMW, and/or Mercedes dealers, but chances are they won't beat a VW dealers prices.

Audi / VW: G 052 910 A2
BMW: 83 19 0 441 139
Mercedes: 000 583 01 07
Manufacturer / Brand: OEM Supplier - Kruse Blue Sky
Quantity: 1 = 1/2 Gallon Container


Not sure if I will want to dump in my other 2.5g MOPAR DEF jug with the tune, maybe if I run the current 4.5g~ down to the Low DEF message.

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  #273  
Old 08-14-2015, 08:52 AM
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Re: green diesel engineering tune

Quote:
Originally Posted by frall9 View Post
I'm also going to continue to track the EVIC MPG numbers to compare to the hand-calc'd numbers. On this particular tank, because the last 180 of the 600 miles was an all highway trip, the EVIC suggested that I was averaging 29.1 MPG at the time I filled-up. Given the EVIC uses a 300 mile rolling average, it's never been all that accurate, but this particular tank was a bit unique so I'll keep an eye on that. Instant economy readouts during that highway drive were consistently over 30mpg, at between 75 and 80mph, where previously I'd only see 20-25 at those speeds, so I'm excited to see what my first long all-highway road trip looks
OMG this myth needs to DIE!!! I wish an engineer familiar with the code would straighten us out once and for all, but I can tell you that this 300 mile thing is not true. I reset one trip odometer, left the other alone. The original had approx 225 miles on it when I reset the other. After 300 miles the two did NOT match. After 350, they did NOT match. After 375? Still did not match. The reset computer stayed higher the entire time as it was all highway. The other got closer the further I drove, but never "caught up" as it would have if the myth were true. At 375 miles on the reset odo, I filled up. But I can say this 300 mile rolling average thing is a myth in my 2014 EcoDiesel.

Does anyone have proof of this 300 mile rolling average thing? Anyone? Please try my experiment before perpetuating what appears to be a huge myth. I may be wrong, but my experiment seems to disprove it. I may try it again some day to confirm.

From reading around it appears as if a GDE tuned EcoDiesel's EVIC will read approx. 2 MPG more optimistic than before. This isn't something GDE has done intentionally, but rather a side effect of one of the changes they've made in the tuning of the Ecodiesel.
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  #274  
Old 08-14-2015, 09:50 AM
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Re: green diesel engineering tune

Quote:
Originally Posted by Zhe Wiz View Post
OMG this myth needs to DIE!!! I wish an engineer familiar with the code would straighten us out once and for all, but I can tell you that this 300 mile thing is not true. I reset one trip odometer, left the other alone. The original had approx 225 miles on it when I reset the other. After 300 miles the two did NOT match. After 350, they did NOT match. After 375? Still did not match. The reset computer stayed higher the entire time as it was all highway. The other got closer the further I drove, but never "caught up" as it would have if the myth were true. At 375 miles on the reset odo, I filled up. But I can say this 300 mile rolling average thing is a myth in my 2014 EcoDiesel.

Does anyone have proof of this 300 mile rolling average thing? Anyone? Please try my experiment before perpetuating what appears to be a huge myth. I may be wrong, but my experiment seems to disprove it. I may try it again some day to confirm.

From reading around it appears as if a GDE tuned EcoDiesel's EVIC will read approx. 2 MPG more optimistic than before. This isn't something GDE has done intentionally, but rather a side effect of one of the changes they've made in the tuning of the Ecodiesel.
my hand calculations per fill up has always matched the computer and I stopped second guessing the car. I measure the number of gallons of diesel added divided by the miles driven per fill up. Usually around 21.xx gallons and I used to get 550 miles and now I'm 610 after GDE tune.
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  #275  
Old 08-14-2015, 10:16 AM
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Re: green diesel engineering tune

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Originally Posted by stician View Post
my hand calculations per fill up has always matched the computer and I stopped second guessing the car. I measure the number of gallons of diesel added divided by the miles driven per fill up. Usually around 21.xx gallons and I used to get 550 miles and now I'm 610 after GDE tune.
I've read around a bit on the RAM forums and one person I know locally reports the same thing. Before GDE, over 12,000 miles his hand calculations were .1 above the EVIC average over that same time. So his EVIC was essentially spot on. Since the GDE tune he says his EVIC reads a little less than 2 MPGs high compared to hand calcs. His report is consistent with what I'm seeing on the RAM forums. Though it's never exactly the same. He's only had 3 fill ups since GDE, so it's a relatively small sample size compared to pre GDE.

I suspect it has something to do with where/how you drive. More city? More highway? Heavy foot? Etc. Again, IN GENERAL the GDE tuned vehicle's EVIC SEEMS TO BE more optimistic than before. And it's ON AVERAGE around 2MPG optimistic.

GDE probably has a better sample size than I do. I wonder if this is universally true or if it's just those that aren't the same that are making the most noise.
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Old 08-14-2015, 11:28 AM
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Re: green diesel engineering tune

Quote:
Originally Posted by Zhe Wiz View Post
OMG this myth needs to DIE!!! I wish an engineer familiar with the code would straighten us out once and for all, but I can tell you that this 300 mile thing is not true. I reset one trip odometer, left the other alone. The original had approx 225 miles on it when I reset the other. After 300 miles the two did NOT match. After 350, they did NOT match. After 375? Still did not match. The reset computer stayed higher the entire time as it was all highway. The other got closer the further I drove, but never "caught up" as it would have if the myth were true. At 375 miles on the reset odo, I filled up. But I can say this 300 mile rolling average thing is a myth in my 2014 EcoDiesel.

Does anyone have proof of this 300 mile rolling average thing? Anyone? Please try my experiment before perpetuating what appears to be a huge myth. I may be wrong, but my experiment seems to disprove it. I may try it again some day to confirm.

From reading around it appears as if a GDE tuned EcoDiesel's EVIC will read approx. 2 MPG more optimistic than before. This isn't something GDE has done intentionally, but rather a side effect of one of the changes they've made in the tuning of the Ecodiesel.
Not sure about the myth, but my lifetime, trip A, and trip B average will all read the same after approx. 300 miles. It's been doing this for 15K miles.
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