Water Injection - DIY


    *I have since removed this.
    Purpose - To lower intake temperatures.

Parts:
Pump - 12VDC, 1.4gpm, 100psi - $80
    ~ Pro-Spray.com ~
Solenoid Valve - 32k5DGV-12VDC - $27
    ~ PowerAire.com ~
Aquamist Parts ~ $120
    ~ KCSaab.com ~
Assorted Brass Fittings ~ $15 Home Depot

    Cost: ~$250
    Time: 3 hours
    Difficulty: Moderate


    Installation

Step 1 An excellent location exists for the pump directly beneath the washer reservoir. This allows for a gravity feed and keeps pipe length to a minimum. The Pro-Spray pump that I used is a relatively large pump but there is ample room for the installation. To mount the pump I lined it up and checked for hose clearance than marked the location of the pump mounting holes. Due to the shape of the frame it is only possible to drill three holes, but I have found this to be sufficient. I then attached the pump two the frame with nuts and bolts.

Step 2 With the pump mounted the next step is to construct the inlet hose. Mine is pictured at the bottom of the page and is composed of the Aquamist filter, hose and quick connector along with several brass fittings and sealant. Loosely fit the inlet hose + fittings so that the reservoir’s tap can be determined and mark the spot on the bottom of the reservoir. Then drill and drain the reservoir. It is a good idea to use a drill bit that is one size smaller than the inlet hose to create a tight seal.


Step 3

When the reservoir has drained lightly sand and clean off the hole. Installing the inlet hose is next and can be a little bit tricky. It is best to attach all the brass fittings first then insert the hose and connect the silver quick connector to the brass fittings. With the inlet hose secure apply sealant around the hose and reservoir connection. Use an elastic, quick setting and plastic friendly sealant with the appropriate temperature range. It might take up to a day for the sealant to reach it’s full strength.

Step 4

Running the connections and tubes



Follow up:
      I’ve been running my DIY water injection system for a few months now and it’s been working great. Pressure switch is set for 7 psi. The reservoir needs filling about every 4-5 tanks of gas.

      I do not recommend that you use windshield washer fluid for the water injection system. Deposits form at the nozzle and around other connections from the soap. Instead I am using a 30% isopropyl alcohol/water mixture without any problems.
Back
Home