Instructions for Installation


Instructions for Installating GreenGPS

Setting up the hardware

  1. 1.Connect the GPS serial cable's serial end to the DashDyno's GPS cable's serial end.

  2. 2.Connect the other end of GPS serial cable to the GPS.

  3. 3.Connect the other end of the DashDyno serial cable to the DashDyno Auxiliary port 2 (from the left with the DashDyno's display facing you). This is IMPORTANT , else the GPS will not interface with the DashDyno.

Setting up the GPS

  1. 1.Switch on the GPS, you can read the manual for eTrex Legend from Garmin to know how the GPS works. Manual is available here.

  2. 2.Go to the Main Menu, and select System.

  3. 3.Select Inteface in the System sub menu.

  4. 4.Set the Interface to NMEA IN/NMEA OUT from the drop down list.

  5. 5.Ensure that the GPS has clear visibility to the sky.

Setting up the DashDyno

  1. 1.Connect the DashDyno vehicle connector to the Car. The connector in the car is usually located below the Dashboard (somewhere below the steering wheel towards the end of the door). More information with figures can be obtained from the DashDyno manual (Chapter 2, DashDyno Basics, Page 8). The manual can be found here.

  2. 2.Connect to the vehicle using the "Connect to Vehicle" option from the Main menu. Please read the manual for instructions for navigation and other controls.

  3. 3.When the connection to the vehicle is successful, select the Files option from the Main menu, then select "Create Files". Choose the DynoSetup file option. Provide a name for the DynoSetup file. We will be entering a set of parameters for the setup, which are summarized below along with an idea for these parameters.

  4. (a)Weight of vehicle, an average sedan weighs about 2600lbs. An SUV weighs about 3500lbs.

(b) Gear ratio, an average value is 3.37

(c) Tire diameter, most small vehicles have a tire diameter of 25in.

(d) Temperature, enter an estimate of the outside temperature.

(e) Elevation, elevation of Champaign above sea level is ~1000ft.

(f) Humidity, enter an estimate of the outside humidity.

(g) Pressure, outside pressure - on a normal day is about 30in. Hg.

(h) Drag coefficient, an average value is 0.30.

  1. (i)Frontal area, typical frontal area is about 25sq/ft.

  2. 4.Go back to the Main menu and now navigate to the Preferences menu. In this menu, choose the Default DynoSetup file and select the file that you created in Step 3.

  3. 5.Scroll down in that same screen after selecting the DynoSetup file and choose the GPS Baudrate as 4800 by clicking OK multiple times.

  4. 6.Go back to the Main menu and choose the Data Logger option. Choose List from this option and then click OK. The display will show a screen with a choice for View Live Data or Create new file. Choose "Create New File" and enter the File Name. Once you are done with that, clicking "OK" will come up with a choice of Parameters. Choose the following 16 parameters to record:


2. GPS Satellites

3. GPS Speed

4. Fuel used

5. Fuel rate

6. Vehicle speed

7. Distance traveled

8. Instant economy

9. Average speed

10. Average economy

11. Idle percent

12. Idle time

13. Drive time

14. Calculated load

15. Engine RPM

  1. 16.Absolute throttle position

  1. 7.Once you are done choosing the parameters, set the sample rate to High and then choose the "Do not set alarms option".

  2. 8.You should now have a screen with the list of parameters and their values. Check to ensure that the GPS values display correctly.

  3. 9.If the GPS values are showing up, an indicator is the GPS HDOP showing as a number greater than 0.0, you can start recording by clicking the "Record" button (the button with the small white dot). To stop recording, click the same "Record" button.