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GDE Eco-performance tune enhancements  RSS feed
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GreenDieselEngineering
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Joined: 10/07/2009 07:25:47
Messages: 353
Location: Southeast Michigan
During the course of our development, we continue to improve upon various areas that we find to further improve upon the customer driving experience. As of Monday, July 27th 2009, we released what we call a “V2 Running Change” calibration that takes upon the GDE cal and adds further improvements to enhance the customer’s feedback. This process is similar to the OEM environment where as further refinements are made, they’re released to the customer after subsequent validation and verification. All ECU modules received on or after this date will receive our latest V2 calibration.

In addition to what you might have read and/or researched about the GDE tune, you’ll notice the following additional enhancements:
___•Fuel gauge linearization: The original fuel gauge display was biased towards the full side so that it would remain there longer, giving the customer the false realization that you were hardly using any fuel. We have modified the fuel linearization so that between full and ¼ tank, the gauge will (within a few percent error) display the actual volume in the tank not including the 2 gallon reserve. Hence, if you were to fill up at ¾ tank, it should hold (20gal capacity – 2 gallon reserve) * .25 = ±4.5 gallons, 9 gallons at 50% gauge reading, so on and so forth. We did this based on customer complaints that the fuel gauge was horribly inaccurate.
___•Off-road driveability in 4-LOW: While the T-case is in 4-low, we found that raising the idle speed from 760rpm to 800rpm allowed the vehicle to very slowly climb a parking curb without the use of the accelerator. Based on our testing, this resulted in a much more effortless off-road drive. Additionally, the accel pedal torque map was revised for the 4-low setting to allow for a more linear application of torque while driving in inclement terrain.
___•Vehicle driveability governors: This is just a refinement of our previous settings to have the drivetrain “clunk” less during aggressive tip-out maneuvers, especially in 3rd gear lockup.
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GreenDieselEngineering
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Joined: 10/07/2009 07:25:47
Messages: 353
Location: Southeast Michigan
For those customers who are already running the GDE tune and wish to upgrade to this running change (or any other subsequent release in the future), you are welcome to do so. You simply need to let us know if/when to expect your ECU and cover the costs of the return shipping to you with no other expenditure on your part (just get it here and get it home).
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