Water meth kits
i'm guessing you have the snow pump? yeah thats thing is a beast. progressive controller, variable pressure all that fancyness.
most kits come with a version of that pump now it looks like
https://www.rbracing-rsr.com/waterinjection.html
Also - found this from the DIY pov:
http://www.turbomirage.com/water.html
http://3barracing.com/diy-water-injection/
Devils own 3 bar MAP based still rocking after several years and about 30 gals of alcohol run through it. Set to kick on with 1psi boost and ramps to 100% around 22psi. Zero failsafes other than ECU pulling 6* and adding 25% fuel in case of knock. Far from ideal setup but I was trying to blow that motor up.
Really depends on how fancy you want it and $$$. Seen some badass high dollar kits and some piecework setups like mine.
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