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](https://myaudis4.com/wp-content/uploads/4mm_nozzle_check_closeup.jpg)
I found that after approximately 70% duty cycle there was very little increase in flow rate through the nozzles.
![4mm Nozzle Datalogging](https://myaudis4.com/wp-content/uploads/4mm_water_injection_flow_test.png)
![Dual 4mm Nozzle Flow Rate vs Pump Duty Cycle](https://myaudis4.com/wp-content/uploads/4mm_flow_duty_cycle.png)
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](https://myaudis4.com/wp-content/uploads/first_4mm_dc_table.png)
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.