AEM 30-3300 V3 Water/Methanol Injection Kit 1-Gallon Boost Dependent 35 PSI

Vehicle Fitment

• Universal - compatible with any turbocharged or supercharged gasoline-powered vehicle. The boost-dependent internal MAP controller supports boost pressures from 1-35 PSI.
• For applications running more than 35 PSI of boost, or for naturally aspirated applications using MAF/IDC input, see the AEM Multi-Input kit (PN 30-3350), which supports an external MAP sensor above 35 PSI and additional trigger inputs.

Fitment Notes

• This kit is designed for forced induction gasoline engines only. The boost-dependent controller requires a manifold pressure (boost) signal; it is not compatible with naturally aspirated applications. NA and ultra-high-boost applications should use the 30-3350 multi-input kit instead.
• The controller's on-board MAP sensor accepts a boost hose connection via a molded-in barbed nipple on the controller housing. This hose must be plumbed to a reliable post-throttle-body manifold pressure source. If the boost reference hose is disconnected or develops a leak during operation, the Boost Safe failsafe output will activate.
• AEM recommends installing an inline WMI fluid filter (PN 30-3003) upstream of the pump to protect the injector and pump internals from particulate contamination. For installations where the pump and tank must be mounted higher than the injection nozzle, the optional High-Flow Low-Current WMI Solenoid (PN 30-3326) prevents unintended fluid siphoning when the system is inactive.
• Maximum methanol concentration: 50%. AEM strongly recommends never exceeding a 50:50 water-to-methanol mixture. Higher concentrations can damage the system's flow sensor and void its warranty. All fluid contact materials (pump, lines, fittings, injector, tank) are compatible with methanol at any concentration, but safety considerations make dilution essential - methanol is toxic, highly flammable, and burns with a nearly invisible flame.
• The injection nozzle must be installed downstream of the turbocharger or supercharger compressor outlet, before the throttle body, for maximum charge air cooling effectiveness. The tank must be positioned below the injection point unless the optional solenoid (30-3326) is used.

Features

• The 30-3300 is a complete, all-inclusive water/methanol injection kit. Every component needed for a full installation is included in the box - controller, pump, tank, injector, nozzles, wiring harness, LED dash light, and all hardware - with no additional purchases required for a standard single-nozzle installation.
• The progressive, boost-dependent controller scales injection flow proportionally to boost pressure based on the signal from the on-board MAP sensor. As boost increases past the programmed start point, the controller progressively increases pump speed and injection flow until full activation is reached. This ensures the engine receives the correct amount of water/methanol at every point along the boost and power curve rather than delivering a fixed flow rate regardless of load.
• Two large, turn-resistant adjustment knobs on the controller set the start point (the boost pressure at which injection begins) and the full activation point (the boost pressure at which maximum injection flow is achieved). The numbered markings are oversized for accurate setting without tools, and the controller is splash resistant with covered LED and test button contacts.
• The Boost Safe failsafe output is a grounded signal that activates when the system detects any of the following: low fluid level (via the tank's conductive sensor), a short in the pump or wiring, loss of electrical continuity, high or low voltage conditions, or a disconnected boost reference hose. This output can be wired to: flash a warning light, retard ignition timing via a standalone ECU or CDI, reduce wastegate duty cycle, or switch fuel maps - giving the builder complete control over the vehicle's response to a WMI system fault.
• The V3 billet aluminum injector uses Swirl Generator Technology to improve fluid atomization compared to the V2 injector design. In AEM testing, the V3 250cc nozzle achieved the same 90°F inlet temperature reduction as the V2 250cc nozzle but did so 6.5 seconds faster - a meaningful advantage on any timed event or road race application where earlier cooling directly translates to earlier power application.
• Three interchangeable nozzle inserts are included: 250cc/min for lower-power applications, 500cc/min for mid-range builds, and 1000cc/min for high-horsepower setups. Swapping nozzles requires no tools and no additional plumbing. The integral check valve in the V3 injector body prevents fluid from draining back through the nozzle when the system is inactive - no external check valve is needed.
• The 200 PSI recirculation-style pump runs continuously using an internal bypass circuit rather than switching on and off. This eliminates pressure pulsing, provides consistent line pressure for repeatable nozzle flow, and operates significantly quieter than switched-style pumps. The Santoprene diaphragm and EPDM seals are chemically compatible with methanol-water mixtures for long service life. The V3 pump is 100% waterproof, making it safe for engine bay or frame rail mounting.
• The 1-gallon tank (10" x 8.5" x 4.25") integrates a conductive low-fluid sensor directly - no float or mechanical sensor that can stick or fail. The sensor uses a positive-lock connector with color-matched wires to the wiring harness for a clean, reliable connection.
• AEM claims water/methanol injection via this system can deliver power gains of up to 20% on forced induction gasoline engines by reducing inlet air temperatures, suppressing detonation, and enabling more aggressive boost and ignition timing without requiring higher-octane race fuel.

Specifications

• Part Number: 30-3300
• Brand: AEM Electronics
• System Version: V3 (V3 injector nozzle; current production)
• Controller Type: Boost-Dependent Progressive; on-board MAP sensor
• Boost Range: 1-35 PSI (internal MAP sensor maximum)
• Pump Type: Recirculation-style, internally bypassed; 100% waterproof
• Pump Pressure: 200 PSI
• Pump Seals: Santoprene diaphragm / EPDM seals
• Injector: V3 precision-machined billet aluminum; Swirl Generator Technology; integral check valve
• Nozzles Included: 250cc/min, 500cc/min, 1000cc/min (3 interchangeable)
• Tank Capacity: 1 gallon
• Tank Dimensions: 10" x 8.5" x 4.25"
• Tank Sensor: Integral conductive low-fluid level sensor
• Failsafe Output: Boost Safe - grounded output on fault (low fluid, electrical fault, etc.)
• Dash Light: LED system status and low fluid warning
• Max Methanol Concentration: 50% (AEM recommended maximum)
• Claimed Power Gain: Up to 20%
• Warranty: 12-month limited

Included Components

• 1x Boost-Dependent progressive controller (on-board MAP, 35 PSI max)
• 1x 200 PSI recirculation pump (V3, 100% waterproof)
• 1x 1-gallon fluid tank with integral conductive low-fluid sensor
• 1x V3 billet aluminum WMI injector assembly with integral check valve and Swirl Generators
• 3x Interchangeable nozzle inserts: 250cc/min, 500cc/min, 1000cc/min
• 1x LED dash light (system status and low fluid warning)
• 1x Wiring harness (color-coded, positive-lock connector, integrated pump power and ground)
• All installation hardware, fittings, and boost reference hose

Product Description

The AEM 30-3300 is the V3 Water/Methanol Injection Kit for turbocharged and supercharged gasoline engines running up to 35 PSI of boost. It is a complete, self-contained system - every component needed for a full installation is included, with no additional components required for a standard single-nozzle setup. The boost-dependent progressive controller uses an on-board MAP sensor to scale injection flow proportionally to boost pressure, automatically delivering more water/methanol as boost increases past the programmed start point.

The V3 designation refers to the injector assembly, which uses AEM's Swirl Generator Technology to improve fluid atomization over the previous V2 design. In AEM testing, the V3 injector achieves the same cooling result as the V2 but approximately 6.5 seconds faster - a meaningful performance advantage in any timed application. Three interchangeable nozzle inserts (250, 500, and 1000cc/min) are included to match the system's flow to the engine's power output, and swapping between them requires no tools or re-plumbing. The integral check valve in the injector body eliminates the need for an external check valve.

The system's Boost Safe failsafe output monitors for low fluid, electrical faults, and continuity loss, providing a grounded signal that can trigger anything from a warning light to a timing retard or boost reduction strategy via a standalone ECU - giving the builder complete control over how the vehicle responds to a WMI system failure. The 1-gallon tank's integral conductive fluid sensor and the LED dash light provide real-time fluid level awareness. AEM recommends pairing this kit with an inline WMI filter (PN 30-3003) for maximum reliability. Maximum methanol concentration is 50% by volume - never run neat methanol in this or any AEM WMI system. Warranty: 12-month limited.