Im sure somebody somewhere built a 12.5 to one dry to the tips marine sleeper motor and had some kind of alcohol - water injection to help it live . They just havent stepped forward. But for the boosted boat guys there is just too much abundance of free intercooler ready water

just not running enough boost normally to make it worthwhile....

This seems funny given how much time and money I've spent keeping water out of my engine.

Water methanol injection was invented in WWII IIRC. It was used to make out planes fly higher (NOT like the drug) and longer on a tank of fuel.

I run it on my Daily Driver corvette.

but its running 12.9 lbs at reline... its arms its self at 2psi, and starts spraying progressivly at 4lbs on. helps with intake temps like you woul dnot belive. BUT I dont see you wanting to do this in a boat....

the tank last a long time in a car, months..... for real with just a gallon or 2.

I don`t see why it couldn`t be run using a good filter and straight lake water. I had two kits all priced out but didn`t pull the trigger last year.

Mittens what are you seeing for intake temps with and without.. how many degree drop?

Dan.. if you can get it scienced out to work with lake water ( fresh water of course) then I'm in... I have been wanting to add it for years. Brad Zastro from your area had it on his MTI, & from what i herd it made a big difference. Good spring project: programmable ignition boxes & water injection

Bananarama , water doesn`t work as well by it self and then theres the possible calcium build up that could screw up the nozzles or a piece of sand.. I wanted to do it just because no one else has but I will gladly let you be the pioneer
Now that my gas tanks are smaller I actually have some room for meth tanks however... no room in my budget once again this year thou.. one day.

I ran water/alcohol, injection back in 1988 on a non intercooled small roots blower set up, I had a 3 gallon tank that was pressurized by the blower. Had a solenoid that would open at 2lbs of boost activated by a hobbs switch in the intake manifold. so once I got the nozzles sized correctly, the system was on autopilot! more boost made more pressure in the tank, and more water introduced to the intake system. it would take weeks to empty the tank, and you could experiment and make any "cocktail" to inject. I had great results with distilled water and isopropyl alcohol. mainly used to fight detonation because I have always tried to run as much timing on the big end as was safe. this helped. also had a 150 shot of NOS at the time as well. 6 valve mechanical fuel pump supplied more than enough fuel when "on the button" spark plugs were two heat ranges colder that the stock 43s. Just an FYI.

abones I would love to hear more about that setup you ran... I can't fit inner coolers & I won't do the Whipple ones.. So that being said I would love to use a set up like you mentioned, sounds like a great way to go