Can you run your car on water?

Can you run your car on water?

There are a lot of plans and gadgets on the internet that claim to allow you to use water as a fuel by splitting it up into its component gases using electrolysis, however I’ve not tried any of these

A few years ago, when living in the tropics, I experimented with adding water via injection directly into the carburettor of an old Holden station wagon. The chemist looked askance when I said I wanted some large hypodermic needles and obviously thought I was a bit deranged when explaining that I only wanted to inject water into my car!

Anyhow, the idea was to use the vacuum line to created a “demand” system that would suck water into the intake when the throttle was opened. This didn’t work particularly well but a bit of experimenting with flattening the needle to create a finer mist and relocating the injection point to the air intake (via the filter) and using a backpack spray pump to provide a partially controlled feed, I was able to lower the engine temp, get smoother acceleration and use a little less throttle for the same cruise speed.

Unfortunately, I didn’t get the system running long enough to get any real figures on fuel economy.

It certainly acted as an anti-knock ingredient under hard acceleration and the temps were much lower, it was in the tropics after all.

I think the process is more like a steam engine where the small amount of water added was turned into flash steam which lowered the cylinder head temperature and also provided a little more torque as it expanded.

Recently, I’ve been wondering if you could adapt one of those ultrasonic “vaporisers” that you get in some indoor fountains and fans and allow the vapour into the inlet manifold.

The other problem that you would need to overcome is suitable metering, perhaps using an exhaust gas temperature level to control the flow?

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