[tjts1]

I understand the idea behind water injection but I'm not completely convinced about the FE benefits at part load. From what I gather, water could work in 2 ways. First it reduces combustion temp which would prevent knock and allow the computer to keep ignition fully advanced in all conditions. This makes a lot of sense on high compression/high boost turbo engines running near peak power. The other and less plausible scenario is a large enough volume of water would effectively increase the compression ratio and therefore delivering more power. Another option would be to allow you to run the car on low octane gas.

Has anybody here documented an FE increase with water injection? After reading from the forum in the above link (great link by the way) nobody had any hard data so far. I'm not saying its impossible, just don't see enough evidence that it works yet. Hopefully with time that will change.

thanks for reading
Justin