yes water injection. the cheep way to do it is run a hose to either the inlet manafold or secondary ventury. the carb will create enough suction to pull water in which will mix with the fuel and air and once ignited will create steam = torque. this will make your engine run cooler and you can advance the timing by up to 10 degrees. the only down sides are it rusts your exhorst out real quick. still it will give you a ####e load more power. If anones interested ill try to get hold of the info and test results and setup plains and scan them on for you, my mate has all the info youll need.