Jet Sizing for WRX

[hotrod]

As I understand it, the aquamist flow chart does not use a fixed pressure, but the pressure their pump will deliver in service at the flow rate of an individual jet.

On the chart the 0.5 mm at 225 cc/min is operating at about 10 bar pressure, and the 0.8 mm jet at 300 cc/min is operating at a pressure of about 7 bar.

You can correct either one to another pressure very easily.

The flow rate through a nozzle or orfice changes at the square root of the pressure. For example if you increase the pressure by 4 times, you will only increase the flow by 2 times.

New flow = rated flow x ( sqrt ( new pressure/rated pressure))

The 0.8 jet running at 7 bar (100 psi) and 300 cc/min would flow 1.22 times the rate 100 psi flow at 150 psi, or about 367 cc/min.

Larry