'Been working on my water injection. I have something of a "Cushman" injection system - as described in the link by Panic. I utilized an old Marvel Mystery Oil injector - originally intended to add upper cylinder lube to older engines - especially when lead was eliminated. ( NAPA describes them as "obsolete" :roll: ).
I've been running mine with water for many months now. It's kind of an interesting relic ( It was given to me by my mentor, close to twenty years ago.) It has a small sight glass, where you can observe the rate of "fluid" injection - dripping off of a brass post - as you turn a brass nob attached to a stainless needle within the feed.
The biggest drawback - the ONE QUART MASON JAR reservoir! That was fine for oil but...
As mentioned above, refilling is frequent (PITA). Several times to the tankfull, or cut back the feed & lose the benefit.
NO MORE! I bought a 2.5 gal Flowmaster garden sprayer ( Liked the name) & adapted it - mounted next to the rad (I love all the space a 300 leaves in a Bronco).
SO now comes the big Q
.
I see that Doug gets 400-450 miles to the gallon.
X - well, 30 -ish ?
Mr. Ricardo says 40:60 (water:gas)
Cushman suggests 1:20.
Now fer my lil mule -
: A full tank of water would go 1:10 with my 25 gal gas tank...
PS, I'm in it as much for the cleaner exhaust as for any power/mileage benefit. No SERIOUS detonation issues - yet!
Oh, yea, I left about 1/2 inch of Marvel oil in the jar to begin with. Of course it floats, & NO microbial gunk, & a nice "sight line" of red to let me know when I'm getting low. The 1:10 alcohol/water mix I've been running this Winter has almost eliminated it now.