Originally Posted by Joseph Davis

Yes, and as usual people's main complaints aren't the problem at hand. If you aren't getting an even mix of water to each cylinder, you aren't getting an even distribution of air to each cylinder. I mean to say you *never* get an even mix of air to each cyl. Why are they bitching? I don't know, either...

The problem is 99.7% of water injection kits either supply a fixed rate of water, or ramp things up based on boost pressure with no regard for how much water is actually needed. You need to keep water:fuel ratio precise (since we tune fuel to match the amount of air entering the engine, this keeps water/power ratio predictable) and then tweak individual injector fuel trims to get everything to match up.

Or that's the idea, anyway.

Originally Posted by rawr

You could just make a blow through water carb :)