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Parameter Range
Speed: 0–255 KM/H or MPH
RPM: 0–9000 RPM
Boost Range: -15~45 PSI or -1~3 BAR
Water Temperature Range: 0~150°C or 0~300°F
Oil Temperature Range: 0~150°C or 0~300°F
Oil Pressure Range: 0~150 PSI or 0~10 BAR
Voltage: 10~16V
Air-Fuel Ratio: 20:1~10:1
Exhaust Temperature Range: 0~1300°C or 0~2400°F
Clock: 24H
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Bottom of Display
1 – SET DATE
2 – SET TIME
3 – SET UNIT — Select to change the measurement unit for pressure
4 – SET LED — Select to turn the LED on and off
5 – SET ALARM — Select to adjust the speed limit alarm
6 – SPEED CAL — Select to calibrate the speed
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Frequently Asked Questions (FAQ)
Q
What parameters can the DO904 race dashboard monitor?
The DO904 can monitor up to 9 key parameters including RPM, Speed, Oil Pressure, Oil Temperature, Water Temperature, Boost, Air Fuel Ratio, Exhaust Gas Temperature (EGT), and Voltage — all displayed on one LCD screen.
Q
Does the DO904 support both metric and imperial units?
Yes. The DO904 supports both metric and imperial units. For example, speed can be displayed in KM/H or MPH, temperature in °C or °F, and pressure in PSI or BAR. You can switch units via the SET UNIT function in the bottom menu.
Q
How does the alarm system work on this gauge display?
The alarm system monitors RPM and Speed values. When a threshold is exceeded, it warns the driver via an audible buzzer alert combined with 8 LED indicator lights. The alarm limits can be adjusted through the SET ALARM menu option.
Q
Can the screen brightness be adjusted automatically?
Yes. The DO904 offers both manual and automatic brightness adjustment. Manual mode provides three selectable brightness levels, while automatic mode uses ambient light sensing to adjust display brightness based on the current environment conditions.
Q
What sensors and connectors are included with the wire harness?
The wire harness includes connectors for: Power, Boost sensor, Oil Pressure sensor, Air Fuel Ratio sensor, Oil Temp sensor, Water Temp sensor, Exhaust Gas Temp sensor, RPM (green wire), Speed meter (red wire), and 3 spare sockets for future expansion.
Q
What warranty is provided and are there installation requirements?
The DO904 comes with a one-year warranty, covering manufacturing defects but excluding damage caused by human factors. Please note that all warranty claims must be accompanied by proof of professional installation.