i had this 2 years ago . but i add methanol to the water. 50% water and 50% methanol . running 18psi of boost with this . using a 60psi shurflo water pump , controlled by a 12v DC water solenoid and injected tru a brass nozzle just right before the throttle body .

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anyone tried CO2 cooler ? abit similar ..

CO2 Tank --> Nitrous Solenoid --> Nitrous Nozzle ... simple as that .