In order to have something to compare with so I can see if the pre-turbocharger water/methanol injection has any affect on the conditions exiting the turbocharger I recorded some information without w/m being injected.

There are two measurements shown, boost pressure and temperature at the outlet of the compressor housing.  Data was recorded in third gear and fourth gear, with two samples made in each gear.

The dashed lines shown fourth gear, solid lines third gear.

Picking up from yesterday, I installed the 0.4mm nozzle jet along with a right angle adapter so that the supply line can run out below the y-pipe more easily.

The adapter swivels so that as the supply line is moved there is no stress being placed on the nozzle portion that is mounted into the plastic y-pipe.

I also added an inline check valve to the line so that fluid from the supply line is not siphoned into the y-pipe from the vacuum.  This should help with system response time, so that soon after activating the pump the water/methanol should be spraying into the y-pipe, rather than first refilling the supply line where liquid has been siphoned off.

One final op check to make sure the system was running as intended before completing the installation on the car.

With that complete the system has now been installed and the car started to make sure it runs ok with the new nozzle.

Continuing the effort from a couple of days ago to check out pre-turbocharger water methanol injection, I ordered a 0.4mm Aquamist nozzle jet from Howerton Engineering that has a rated flow rate approximately one half of that of the 0.5mm nozzle.

The goal was to reduce the volume of water being injected, but maintain a small droplet size.  The drop in nozzle size should enable me to operate the pump at a higher duty cycle, for higher line pressure, with less fluid entering the y-pipe.

Initial operation of the system with the new nozzle shows positive signs of having less fluid being sprayed.

I also did some further thought on the placement of the nozzle.  I decided to switch locations and go with a location further up stream that is firing vertically into the upper side of the main tube of the y-pipe.

Based upon the spray pattern of the nozzle I am hoping to evenly distribute the water spray across the tube, despite now potentially having a greater percentage of the fluid spray hitting the opposite side wall.