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Ya know... where you take off the brake booster line, and inject water, usually on a hot or warm engine (the cooling system keeps it around the same temperature anyways whether it's idling or just did hours on the highway.) ?
Sounds like a good way to screw up an engine and void a warranty. I would never do it and I also stay away from snake oil like Seafoam and Marvel Mystery Oil. I use top tier gas and synthetic lubricants and have never had an engine problem.
Back in the day I saw it done through the PCV hose or sprayed down the carb. In today's fuel-injected vehicles, you really only have air in the manifold plenum as the injectors are close to the intake valves. So there's not much chance of varnish to build up.
Now, I just run Seafoam through with the fuel in the tank.
As to water working better than Seafoam, I don't think so.
Back in the day I saw it done through the PCV hose or sprayed down the carb. In today's fuel-injected vehicles, you really only have air in the manifold plenum as the injectors are close to the intake valves. So there's not much chance of varnish to build up.
Now, I just run Seafoam through with the fuel in the tank.
As to water working better than Seafoam, I don't think so.
I know it can also be done directly through the intake..
As to "why water," there are forums that suggest it turns to steam, and actually really does clean better than primarily SeaFoam (I've seen it done with MMO as well.)
Mostly, just before an Emissions inspection, or when the vehicle begins to hesitate...
It is a remnant of the water/alcohol injection used in radial engine aircraft, often called ADI fluid (Anti Detonation Injection).
I used to mix the stuff when I was in the Navy. In a tank on wheels (a "bowser") we would put 55 gallons of denatured alcohol, 55 gallons of distilled water, and 2 gallons of water-soluble cutting oil (to lubricate the pump).
Then, after thoroughly mixing it, we pumped it into a tank behind the engines of a P2V-7 Neptune. It was used primarily on take-off to help keep cylinder head temperatures down on those R-3350-32WA engines, and help prevent detonation at high power settings.
It worked.
Years ago, we used to trickle water into the intakes of old Chevys and Fords. It seemed to help some.
It is a remnant of the water/alcohol injection used in radial engine aircraft, often called ADI fluid (Anti Detonation Injection).
I used to mix the stuff when I was in the Navy. In a tank on wheels (a "bowser") we would put 55 gallons of denatured alcohol, 55 gallons of distilled water, and 2 gallons of water-soluble cutting oil (to lubricate the pump).
Then, after thoroughly mixing it, we pumped it into a tank behind the engines of a P2V-7 Neptune. It was used primarily on take-off to help keep cylinder head temperatures down on those R-3350-32WA engines, and help prevent detonation at high power settings.
It worked.
Years ago, we used to trickle water into the intakes of old Chevy's and Fords. It seemed to help some.
Yes, this "trick" used to be a good addition to engines that had to pull hard to move a heavy load by making the intake air "damp" to better burn the leaded gas used back them. Use of water injection with today's electronic injection systems no lead gas is not a good idea at all.
This isn't 1950 anymore, cars are way more sophisticated and complicated. That little trick might have worked on Grandpa's flathead Ford, but today's sensors, catalytic convertors, computers, and injectors would not take kindly to drowning the engine.
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