Aquamist HFS-3 and MINI Tank GB

[Howerton Engineering]

One thing to remember, the gauge is not an absolute measurement. It was never designed to do so. For example, if you have a 400cc jet in the car, and you set the gauge to 6 of 8 bars at 100% flow in test, each bar will not be 66.6cc. The spin up of the turbine, and the mapping of the turbine signal both skew the ramp up of the unit. It will ramp up faster in the lower IDC region than it moves in the upper. The reason for this is it makes the failsafe more effective on the bottom end of the scale. So when one sets up the gauge properly and has the wastegate cut hooked up, the onset of a plugged jet is caught quicker.

So the gauge will appear to ramp up to the middle region very quickly, then build to the max flow settings.