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Old 08-23-2012, 05:15 AM   #57
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Also just did the Renntech ECU tuning.

Big difference on highway. Amazing acceleration, all things considered.
What does that do to the mileage?
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Old 08-24-2012, 05:24 AM   #58
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What does that do to the mileage?
I lost about 1mpg at highway speeds (70mph). I appreciate the accellaration ability, especially when passing. Our last 3500 mile trip to the Grand Circle, we averaged 18.5mpg. I felt this was acceptable. We did alot of mountain trekking. It is all an up hill climb from Oklahoma.
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Old 08-24-2012, 05:39 AM   #59
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I lost about 1mpg at highway speeds (70mph). I appreciate the accellaration ability, especially when passing. Our last 3500 mile trip to the Grand Circle, we averaged 18.5mpg. I felt this was acceptable. We did alot of mountain trekking. It is all an up hill climb from Oklahoma.
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Try starting out from New Orleans… EVERYWHERE is uphill from here!
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Old 08-24-2012, 09:22 AM   #60
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Try starting out from New Orleans… EVERYWHERE is uphill from here!
But, the French quarter is so close!


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Old 08-24-2012, 09:47 AM   #61
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What does that do to the mileage?
I haven't been able to calculate mileage yet. But I think it should stay the same if not get better. It all depends on your driving habits. And I'm conservative at cruise.

I did it equally for mileage and performance.
They were not able to remove speed limiter, but what's the point in trying to run the thing past 80 anyway.
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Old 08-24-2012, 09:59 AM   #62
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But, the French quarter is so close!


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Well, it's true that the French Quarter has gone downhill since the days when I hung out there, but it's not a downhill drive from where I live, so going there has no effect on my fuel mileage.
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Old 08-25-2012, 10:17 PM   #63
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They were not able to remove speed limiter
I am very curious about this. Removal of the speed limiter is the sole reason I have been interested in buying the Renntech tune. Did they say why? Is there any other information you can provide?
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Old 08-26-2012, 07:48 AM   #64
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I am very curious about this. Removal of the speed limiter is the sole reason I have been interested in buying the Renntech tune. Did they say why? Is there any other information you can provide?
This is probably to prevent engine over-rev as diesels obviously, do not rev as high as gas engines.
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Old 08-26-2012, 08:23 AM   #65
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If I remember correctly the Euro modes have no governor on them. Jim
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Old 08-26-2012, 08:35 AM   #66
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If I remember correctly the Euro modes have no governor on them. Jim
Probably because they also have the Autobahn, where speed limits are verboten!

Which, if that's the reason, would mean that there's no technical reason to have one here, either, only a political one.
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Old 08-26-2012, 01:11 PM   #67
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I am very curious about this. Removal of the speed limiter is the sole reason I have been interested in buying the Renntech tune. Did they say why? Is there any other information you can provide?
It wasn't that they weren't able to do.

They said the limiter was in another part of the computer and since my was the first 2010/2008 sprinter chassis they were tuning that it would take more time. I may go back for it but top end wasn't my concern.
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Old 08-26-2012, 01:57 PM   #68
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Probably because they also have the Autobahn, where speed limits are verboten!

Which, if that's the reason, would mean that there's no technical reason to have one here, either, only a political one.
Vehicles manufactured in Germany do have a 155mph limit on them. It was negotiated a quite a few years ago when there was discussion of actually posting a speed limit for emissions reasons. The German manufacturers and the powers to be negotiated the electronic limitation in the cars computers. This limitation exists on German cars imported into all markets. It kind of pisses the Germans off a bit knowing that others, including the Italian auto manufacturers, do not have to limit theirs and can sell them that way in Germany.
This is a rather moot discussion as I would not want to pilot our Sprinters into the speed realm above 80 mph.
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Old 08-26-2012, 05:15 PM   #69
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This is a rather moot discussion as I would not want to pilot our Sprinters into the speed realm above 80 mph.
Agreed. I don't know of anywhere in the US with a posted speed limit higher than 75mph. An 80mph top speed works for me.
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Old 08-28-2012, 10:24 AM   #70
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I'm wanting to upgrade the suspension on the Interstate. Does anyone have experience with the shocks or air bags.
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