Originally posted by techinspector1
Water injection and water/alcohol injection has been used for decades to allow more c.r., more timing, more boost or whatever. Knowledge of its attributes were brought to the fore during WWII when it was used on piston engine aircraft to allow more boost.

Here are a couple of sources....
http://www.kennedysdynotune.com/waterinjected.htm
http://www.racetep.com/wik.html?src=...er%20injection

For any of you guys who are experiencing spark knock and just want to experiment with water injection on the cheap, get yourself a windshield washer tank with built in pump off a Ford at the boneyard. Run a rubber feed line from the pump to the carb throat and terminate it into an orifice with a diameter of 0.030". You might be able to rig up a blank carb jet drilled out or whatever. Point it in the middle between the two primary venturis. Rig up a microswitch at the carb linkage to provide power to the pump at half-throttle or whatever. Experiment. Go to the grocery and get a few bottles of Isopropyl rubbing alcohol. Mix three bottles of alcohol with two bottles of water. Usually, the percent of alcohol found at the grocery will be 70%, so three bottles of alcohol and two of water will give you about a 50% mix.
I have an old nitrous plate w/single spray bar and changable jets. My Luv engine is 10.9:1 and will ping under load if I don't add one can of NOS per 5 gallon octane to 93 Exxon and back off my timing. If I use two .015 jets and the Ford washer motor/bottle, do you think it would work?? I could rig the micro switch to kick as soon as the secondaries open. The engine is all forged 383 with iron heads. Flat tops, zero deck, .039" quench, and 64cc hand polished chambers.