Tried DIY water injection today and it seems to work. The bj-73 runs a lot better and makes a lot more boost without the intercooler, but egts and coolant temperature do get hotter. Egt's actually fluctuate with ambient temperature as well.
Been thinking about trying water injection for some time now in lieu of intercooling. My initial setup is quite simple I bought a $18 universal window washer pump kit on Amazo(tank with pump, switch, lines, nozzles. Mounted it under the hood drilled a hole in my steel air intake just before the turbo and install the nozzle and put a momentary switch on one of the blank plates for the auxiliary switches on the dash...... It's full manual but it seems to work. If I need to accelerate to interstate speed on a slight grade or try to hold speed on a rolling Hill I can push the button for a couple seconds when my EGTs Spike and they stop climbing.
Did a full throttle pedal to the floor run to 70 mph tonight normally I can Spike my egts hotter than 720c. With the water injection I start giving some short intermittent pushes of the switch at 650c and the EGTs stop climbing. The test was with straight water not the 30% methanol window washer fluid that's supposed to work the best.
Putting the nozzles pre-turbo helps atomized the water and is a simpler setup because a simple washer pump will work. Supposedly water spray hitting the turbo blades will eventually cause erosion of the blades but cooling the bearing will make the bearing last longer. Erosion supposedly starts to occur at about 80,000 MI of use. I'll be ecstatic if my $120 made in China turbo last that long.
Looking forward to trying this thing out on the interstate. Maybe I can figure out some way to make this thing turn on when it reaches a certain temperature energizing some sort of intermittent relay.
12V Universal Car Windshield Washer Pump System with Jet Button Switch 160186 Reservoir Tank Bottle Kit Universal Windshield Washer Kit
Amazon product ASIN B06Y131DQ7
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