Water or Water/Methanol Injection DIY

[CrankyOldMan]

Originally Posted by 06YarisRS

Since I'm not looking to gain any power here - simply provide a higher effective octane number - in your opinion, is any amount of water injection helpful? For example, if I couldn't meet the full recommendations of load/boost etc water volume, would lesser amounts still help to some degree? I'm sure it's a truly linear relationship, or if there is some kind of minimum needed to have any effect.

That's all way out of my wheelhouse. I've never done tuning before, just slapped the Blitz on my 1NZ and called it a day.