4mm Nozzle Check

4mm_nozzle_check_overview

After installing the Aquamist 4mm nozzles I ran through a series of duty cycle checks to determine the true flow rate through the nozzles, albeit into atmospheric pressure instead of manifold boost.

Aquamist 4mm Nozzles
Aquamist 4mm Nozzles

I found that after approximately 70% duty cycle there was very little increase in flow rate through the nozzles.

4mm Nozzle Datalogging
4mm Nozzle Datalogging
Dual 4mm Nozzle Flow Rate vs Pump Duty Cycle
Dual 4mm Nozzle Flow Rate vs Pump Duty Cycle

With the change in flow rate that the 4mm nozzles caused, capping the maximum flow rate around 375 mL/Min., I updated the Torq Tune Pump Duty Cycle table.

Torq Tune Pump Duty Cycle Table
Torq Tune Pump Duty Cycle Table

The new table values put the pump at up to 100% duty cycle, and do so at 17-19 psi, whereas with the pair of 0.7mm nozzles I was running the pump at a maximum duty cycle of 45% and recording more flow.