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  #169  
Old 07-04-2015, 09:57 PM
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Re: green diesel engineering tune

Got my best tank at 31.09 on a 350 mile hey trip. Speeds varied from 55-75 and went from sea level to 4000' in triple digit heat in the desert. Not too shabby for a 5300lb 4x4 truck.

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  #170  
Old 07-06-2015, 01:42 PM
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Re: green diesel engineering tune

How are the emissions compared to stock?
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  #171  
Old 07-06-2015, 02:08 PM
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Re: green diesel engineering tune

With the GDE tune CO2 is reduced about 15%, PM is down about 75%, HC is down about 30%, CO is down about 30% and NOX is increased a bit. The tune will still pass any state or territory emission test.
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  #172  
Old 07-06-2015, 02:59 PM
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Re: green diesel engineering tune

First 100 miles I'm seeing 29.4 mpg. A 4 point improvement over factory tune. I do notice a smidge of higher motor noise around town but on the hwy it is refined like before. I'm really impressed.
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  #173  
Old 07-06-2015, 03:13 PM
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Re: green diesel engineering tune

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Originally Posted by GreenDiesel View Post
With the GDE tune CO2 is reduced about 15%, PM is down about 75%, HC is down about 30%, CO is down about 30% and NOX is increased a bit. The tune will still pass any state or territory emission test.
I've got an APR tune on my GTI, so I've familiar with ECU mapping. Increasing power output is one thing, but how can your tune reduce emissions while keeping all the OE emission equipment intact? Seems like that in and of itself would be something Jeep and the EPA would want, as well?

Also, I had a 2009 BMW 335d whose DME (ECU) could adapt to slightly higher cetane levels if you could find the better diesel, like what is available in Europe. Given that in Texas metro areas we enjoy State mandated minimum levels of 48 cetane, when I added a little Amosil Cetane boost it was like the engine was running on glass - just as smooth and powerful as could be. I'm curious how the GDE tune handles various cetane levels?
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  #174  
Old 07-06-2015, 05:22 PM
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Re: green diesel engineering tune

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Originally Posted by GreenDiesel View Post
With the GDE tune CO2 is reduced about 15%, PM is down about 75%, HC is down about 30%, CO is down about 30% and NOX is increased a bit. The tune will still pass any state or territory emission test.

So everything but NOX is significantly reduced? I assume a good chunk of this is due to EGR? Can you explain exactly what is done with that? I'm guessing it functions normally until xxx temp and then shuts off?
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  #175  
Old 07-07-2015, 10:32 AM
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Re: green diesel engineering tune

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Originally Posted by farfromovin View Post
So everything but NOX is significantly reduced? I assume a good chunk of this is due to EGR? Can you explain exactly what is done with that? I'm guessing it functions normally until xxx temp and then shuts off?
I believe it is the exact opposite. I thought they completely eliminated it from operating.
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  #176  
Old 07-07-2015, 10:53 AM
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Re: green diesel engineering tune

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Originally Posted by timmy_ View Post
I believe it is the exact opposite. I thought they completely eliminated it from operating.
Yes, eliminated.
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  #177  
Old 07-07-2015, 11:02 AM
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Re: green diesel engineering tune

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Originally Posted by 2012 Summit View Post
Yes, eliminated.
I think eliminating EGR is one of the reasons power and efficiency is increased. I read on RAM diesel forum that the turbo used in this motor limits additional power. Any more power and the factory suspension and brakes will feel off balanced imo.
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  #178  
Old 07-07-2015, 12:33 PM
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Re: green diesel engineering tune

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Originally Posted by farfromovin View Post
Boom, that's what I'm talking about! After 1500 miles or so of whiplash road tripping' I figured that out on my own. If I force it into a gear it won't downshift from 8th to 5th and floor it!
So how do you do this? Do you just use the paddle shifter to put it down in to 7th, then upshift back to eighth with the other paddle and it stays?

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Funny story (in retrospect). I told my wife to use the button behind the steering wheel to adjust the radio volume when the vehicle was a day old. She refused to take a driving lesson from me as she considered it degrading. She called and said "2x today I drove full throttle and the car only went 25 mph..." After some questioning I determined that she downshifted it in to second gear with the paddle shifter behind the steering wheel. It's been months and the car runs great so I guess everything is fine. Might have even assisted with the break in!
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  #179  
Old 07-07-2015, 03:09 PM
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So how do you do this?
Tap the upshift paddle when you're already in 8th. No need to downshift simply in order to shift back into 8th.
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  #180  
Old 07-07-2015, 04:30 PM
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Re: green diesel engineering tune

Thanks Roadkill, I hadn't thought of that for some reason.
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