[Lastchild]

Being that a water injection system can effectively raise the octane of fuel your using and as far as I know is proven tech.

Why dont car manufaturer's use this as a way to increase compression and or boost on cars to increase performance without worry about octane.

It would seem a relatively cheap "trick".

I realize most people use alki but i thought regular water was also effective.

Any insight?

[amg destroyer]

IIRC, some old production cars did use water injection. The only problem is that if it runs out or water, or somehow fails elsewhere in the system, you are screwed. Many people would be careless and not check and properly maintain the system. It is just another liability that the car companies do not want/need. It would be awesome as an option though.

[Turbineguy]

There are too many people without enough sense to check the water tank. Most people don't even know what an oil dipstick is let alone why you need to put water in your car somewhere besides the radiator to keep the engine from grenading.

[Fogrider]

I agree with John Q. Public not wanting to be bothered with another item of which to keep track. An item not yet mentioned is the simple environmental effect of cold. Here in NH my straight H2O would be frozen most mornings from November to April.

[halfelite]

There are many points of why not. People would have to run distiled water so not to clog it up. then you take into account the freezing point. and tuning for it. for differnt weathers. there are just to many negative points for a factory to install it. And then you come down to water ratio People say you need a 10-1 fuel to water and as this works decent in low loads for gas saving. But uneder high load people seem to see better under 10-8 so you need a huge water tank.