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Originally Posted by Reed
water injection is a great idea but it should not be used as an octane booster. it is great for a turbo system that is running at its absolute maximum boost level and using water injection to create a margin of error for bad fuel or a sudden drop in fuel pressure or for anything else that may go wrong. Many people see it as a bandaid for a bad tune. Of course water injection can be used to increase boost but I would say to use for safety reasons or maybe for a slight and momentary increase in boost.
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Well if it can create a significant margin of error where there was not one before allowing the use of maxamum boost, is that not raising the boost pressure in effect? And if you can safely advance your ignition timing a few degrees in that not creating more power? I have one more technical question if anyone can anwser it I know that the water vopor displaces some of the air in the cylinders but it also cools the air in the intake runners condensing it, what is the difference in the effect of displacement vs condensing (or vice versa), in other words how much more does it displace vs condense? I used to be able to remember the formula for that but it has been a long time since I finnished collage chemistry and my math is a little fuzzy.