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  #277  
Old 08-14-2015, 12:28 PM
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Originally Posted by 2012 Summit View Post
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.
Mine do not. I'm currently running this very experiment and my Trip A and B remain different after >1,500 km of the experiment. I no longer believe these trip A/B measures use a limited distance average.

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  #278  
Old 08-14-2015, 12:49 PM
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Re: green diesel engineering tune

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Originally Posted by Roadkill View Post
Mine do not. I'm currently running this very experiment and my Trip A and B remain different after >1000 km of the experiment. I no longer believe these trip A/B measures use a limited distance average.
Agreed. This may be something that was changed between the 2012 models and the 2014s. Mine does not exhibit this "limited distance average" behavior either.
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  #279  
Old 08-14-2015, 01:42 PM
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Originally Posted by Zhe Wiz View Post
Agreed. This may be something that was changed between the 2012 models and the 2014s. Mine does not exhibit this "limited distance average" behavior either.
If my Trip A/B hasn't hit a "limited distance average" in >1,500 km / >20 hours worth of driving, then we are approaching Russell's Teapot territory in terms of burden of proof.

The range / distance to empty calculation is obviously using a rolling distance average economy though.
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  #280  
Old 08-14-2015, 03:11 PM
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Originally Posted by Zhe Wiz View Post
From reading around it appears as if a GDE tuned EcoDiesel's EVIC will read approx. 2 MPG more optimistic than before.
Unfortunately, an mpg difference statistic is close to useless. If we had an L/100 km difference statistic then that would actually allow comparison. Conversely, supplying the "before and after" mpg values will allow consumption stats to be determined.
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  #281  
Old 08-14-2015, 04:27 PM
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Re: green diesel engineering tune

My EVIC is anywhere from 2-3.5 mpg optimistic compared to hand calculations repeatedly over 4k miles with GDE. I think it's driving style.
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  #282  
Old 08-14-2015, 05:13 PM
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Re: green diesel engineering tune

I believe the average displayed on the fuel economy page (the one with the green and blue semicircle gauges) runs the 300 mile rolling average. I've reset both the trip odometer and the fuel economy gauge at a fill up and by the time the tank was empty they were different.

I also agree with not filling the DEF. I only put in about 4-5 gallons after it gives me the no start in x miles warning. Brings me up to about half a tank and I know I'll use it all up before it goes stale.
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  #283  
Old 08-14-2015, 11:50 PM
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Re: green diesel engineering tune

Quote:
Originally Posted by Roadkill View Post
Unfortunately, an mpg difference statistic is close to useless. If we had an L/100 km difference statistic then that would actually allow comparison. Conversely, supplying the "before and after" mpg values will allow consumption stats to be determined.
Uhh... MPG and L/100Km are both the same thing... fuel per distance. 1 Mile per gallon = 235.214583 l/100km, you can just do the math to figure convert one to the other
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  #284  
Old 08-15-2015, 01:04 PM
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Re: green diesel engineering tune

I just had the GDE hot tune flashed yesterday, and plan to compare my hand calculations to the EVIC. The only calculation I have done prior to the GDE tune indicated that the EVIC was spot on.

I will report back to this thread after the next fill up.
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  #285  
Old 08-15-2015, 03:02 PM
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Originally Posted by Ampt View Post
Uhh... MPG and L/100Km are both the same thing... fuel per distance.
Haha, o rly? One is distance per volume of fuel and the other is volume of fuel per distance.
Quote:
1 Mile per gallon = 235.214583 l/100km
You have just pointed out why giving MPG delta doesn't work unless you give the actual values, e.g. "improved from 28 mpg to 30 mpg".
Quote:
you can just do the math to figure convert one to the other
No, you can't convert an mpg offset to L/100 km unless you have a reference mpg value for the change. As an exercise for the reader, calculate the fuel efficiency improvement (ie. the difference in L/100 km, or gallons/100 miles if you prefer) for improving from 2 mpg to 4 mpg, then do the same for improving from 28 mpg to 30 mpg. What did you find out? I mean, they're both an improvement of 2 mpg, right?

The fundamental problem is that an MPG is not necessarily an MPG in these discussions, whereas an L/100 km difference is always comparable.
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  #286  
Old 08-16-2015, 05:45 PM
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Re: green diesel engineering tune

Got my new ECU tuned from GDE and installed Saturday, really not that bad to install at all and took 20 minutes, tops. I never lost my oil life monitoring, and my DEF appears to have kept right where it was at prior. New torque is awesome, good old fashioned, low-end diesel torque akin to the old big-block V8's. Other than the power increase, one would never know the vehicle was tuned.

With SCR keeping the Nox levels low, I love turning off the EGR and the peace of mind knowing that my truck will run a long ways without carbon build up.
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  #287  
Old 08-16-2015, 05:54 PM
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Re: green diesel engineering tune

Not sure what everyone else is seeing, but thought I'd post my 0-60 time

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  #288  
Old 08-16-2015, 06:10 PM
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Re: green diesel engineering tune

Are you all buying your own spare ECM's and sending those in, or are you doing the exchange?

If you're buying your own, do any of you have a link to where you're purchasing from?
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