boost gauge / oil/ and water gauges for turbo

  1. #1
    hi . was wondering if any body with a saxo turbo might know this , ive just fitted three gauges , i can not test the boost gauge as the car has only a mani on at the minute and is not road worthy,

    the question is when i turn the key all 3 light up so have power to the gauges

    when i start engine and leave it running the oil and water work and show the temp and pressure

    but i have no way of knowing if the boost one works

    if the car is out of gear and i rev the engine up to say 3500rpm should the boost gauge move and show its on boost even thow the car is not moving

    any help would be great thanks