| All - on the average stock Z, approx 3 more PSI on pump gas which is about 30rwhp can be had with Water Injection. As you can see by reviewing the A/F ratio graphs, with the usage of a methanol mix 25% or more, one can actually produce more rwhp safer !!! red line = 1.4 bar pump gas ~ 94 octane ( no detonation )
blue line = 1.65 bar pump gas w/ WI ~ 94 octane ( no detonation ) 
If you live in very hot climates or have lower than 93 octane at the pump, IMHO - WI is a "no brainer" for extra buffer ( same boost levels ) or more / higher PSI at the same or safer A/F ratio levels
I have sourced together 3 different kits based on your individual needs / setup :
Option 1 ~ Basic Water Injection Kit with dual nozzle upgrade
Stage 1
 Water/methanol injection system with everything needed to start making big HP! Includes: 150 psi high volume pump, adjustable boost pressure switch, 2-qt. Reservoir,dual nozzle upgrade , two nozzles sized to your RWHP and boost levels, Bosch relay, all the electrical parts, fittings, tubing etc. to install - a complete kit made with quality, proven components.
$ 340 Shipped !
Option 2 – Variable ~ option 1 with Variable Controller add on
Stage 2 with Variable Controller
Includes Stage-1 plus:
Variable Controller that varies the quantity injected vs. boost. This allows maximum power at all RPM/boost levels as just the right amount is injected at all times. Features include adjustments for onset boost level and full quantity boost level. Note: The variable controller replaces the boost pressure switch and relay included in the stage-1 kit. $430 shipped ! Option 3 - ( Variable ) ~ with Safe Injection and 220 PSI pump add on
Stage 2 with Safe Injection module this is the ultimate in water injection setups ! 
I highly recommend this module. You can wire this into a boost controller and it can be set to limit your boost ( cut the power ) when activated. Can help you save your engine if you have tuned to a higher boost setting with the water injection spraying. For years, many have wanted to use water/methanol injection but have not taken advantage of the power increases do to safety concerns. Designed as an ad-on to the Boost Cooler? water/methanol injection system, Safe Injection? provides for a safe tune in those instances where no injection is present and an aggressive tune is utilized.? This system reduces boost or timing anytime injection quantity goes below a set point (e.g. if reservoir level goes too low) making the tune instantly conservative for the ultimate in safe water/methanol injection.
The larger 220psi pump upgrade. ( larger pump will allow for more versatility in tuning and you get a larger flow range ) and the safe injection will assist in notification when the water injection fluid is low.
$530 shipped !! *** biggest savings ! over $100 on MSRP *** Please inquire about other accessories from
http://www.snowperformance.net/news.php ]">Snow Performance .
Three different nozzle sizes based on power application / turbo size
General guideline
stock ~ 175 ml
> stock and < 450RWHP - 375 ml
> 450 rwhp - 675 ml
175ml/min nozzle @ 100psi=200ml/min @ 200psi=240ml/min
375ml/min nozzle @ 100psi=430ml/min @ 200psi=520ml/min
625ml/minnozzle @ 100psi=720ml/min @ 200psi=865ml/min
No extra charges for paypal / amex / mc / visa / discover
Shipping outside the continental 48 extra
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Please inquire about other accessories from
Snow Performance
Safe Injection
Description: For years, many have wanted to use water/methanol injection but have not taken advantage of the power increases do to safety concerns. Designed as an ad-on to the Boost Cooler? water/methanol injection system, Safe Injection? provides for a safe tune in those instances where no injection is present and an aggressive tune is utilized.? This system reduces boost or timing anytime injection quantity goes below a set point (e.g. if reservoir level goes too low) making the tune instantly conservative for the ultimate in safe water/methanol injection. Operation
The SI-10 and SI-05 monitor the flow of Water/Methanol in the system. When flow drops below 0.10 Gallons per Minute (GPM), equal to 378 ml/min,( 0.05 GPM or175ml/min on the SI-05) the fault trigger will go to a high state of 12 volts. In addition to the supplied red LED, this trigger can be used to signal the following:
1. an ignition/timing controller such as an MSD timing computer if using an MSD ignition
2. aftermarket engine computer
3. a solenoid such that boost is reduced in a wastegated turbo set-up. ( $39.95 list. See below.)
4. a solenoid to evacuate boost on a supercharged set-up.
The trigger signal can deliver up to 1.5 amps to drive a solenoid or relay. Variable controller ~ comes with the stage 2 kit !! Description: The Electronic Variable Controller from Snow Performance represents the latest technology in Water/Methanol system control. The controller is designed to increase injection pressure over a user adjustable range and quickly shut off when boost pressure drops to prevent misfire. No special MAP or MAF is required. The controller has a .2 to 5 volt output signal (denotes 2.9 to 36.3 manifold boost psi) that can be used for an input to other applications. The small rugged design and easy setup makes the EVC the logical choice for automotive/offroad enthusiast. Operation:
An external hose barb is provided to connect the controller to manifold pressure. The user then sets two dials that are located under the lid of the controller. The first dial tells the controller what pressure to turn on and off. The second dial tells the controller the pressure where maximum injection is required. Once the two dials are set, the controller will linearly increase/decrease the injection pressure over the set range. Start pressure is adjustable from .5 to 8psi. The Full pressure is adjustable from 2 to 25psi. Note that if the Full Psi dial is set below the Start Psi setting, full injection pressure will occur once the Start boost psi is reached
Reverse Flow Check Valve
Description: This valve mounted between the reservoir and the pump inlet is used to keep boost from reverting back through the reservoir during the pre-injection state. Recommended in high boost (over 15psig) applications.
Fluid Level Switch Upgrade
Description: Indicates low fluid level to insure you don't run out. Includes an upgraded reservoir with level switch, Red LED, and fittings necessary to install. Solenoid Upgrade 
Description: For use when the nozzle is mounted after the throttle plate (to keep from siphoning at idle) or if the nozzle must be mounted lower than the reservoir (to keep from gravity feeding).
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Snow Performance Sales Pitch : " 1) Engineering - each system has been designed and tested by engineers to ensure reliability and robustness. The Boost Cooler will do what it is designed to do for a very long time 2) Digital Variable Controllers for different applications - Not just boost actuated, we have specially designed controllers for each vehicle / application to ensure maximum power 3) High Pressure/ High Volume Pumps - Our pumps are specially designed for Snow Performance to deliver higher pressures and reliability. Each pump is pre-tested and designed to work with methanol. 4) Unsurpassed Atomization - Along with higher pressures, our nozzles are specially designed to spin the fluid supersonically before being forced through a venturi shaped oriface for the ultimate in atomization. 5) Trained technical and tuning advice - trained, knowledgeable technicians are always available to help. 6) Warranty - Life time warranty available. Snow backs it's systems with industry leading warranties. 7) Customer Service - Expert technical advice is available anytime during business hours. We have the experience to answer installation and tuning questions. 8) Safety - Our new safe injection is the ultimate in safety for even the most aggressively tuned applications. This ensures worry-free power in even the most demanding racing applications as well as full power on the street. With the proper tuning, expect about 10-20% improvement in power. Can be used in Nitros applications. Can be used in MAP and MAF applications. The Safe Injection Module can be used to trigger a warning lamp, bleed off boost pressure ( electronic boost controller or manual boost controller),or switch EMS maps."
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Snow Performance Water Injection - Base Kit Specials - 
