GROUP BUY Rail Pressure / Oil Pressure dual gauge

[Matt400]

What you need to change is the pressure averaging time.

From the manual-

(At) Press and hold down the red button. After 2 seconds, the current pressure averaging time will be displayed. Single click to increment up, or press and hold again for 2 seconds and the set point will count up quickly. When the set point number reaches 25. 0 it will go back to 0. 1 (0. 1 switches averaging off). To return to the menu, leave the button for 4 seconds.

I changed mine to 2. 0 and the gauge still seemed to respond quickly while being more readable. 5000-5500 was what I saw in my 03 CA SO truck at idle.