You have 0 items in your cart
Price range: $250.4 through $468.1
The Bosphorus Innovations Stage 4 PWM Water/Methanol Injection Kit is engineered for high-end professional builds requiring absolute custom control. Controlled via a standalone ECU using 2D or 3D injection maps based on TPS, MAP, or engine load, it supports single-stage, dual-stage, or fully progressive injection workflows paired with a large 5.9L fluid reservoir.
Standalone ECU PWM Control: Program dynamic 2D or 3D injection maps based on Throttle Position Sensor (TPS), Manifold Absolute Pressure (MAP), or overall engine load.
Flexible Injection Modes: Supports single-stage, dual-stage, or fully progressive fluid delivery configurations tailored to your exact performance curve.
Pulsation-Free High-Pressure Pump: Employs an internal bypass architecture instead of a pressure switch for a smooth, constant, and even spray pattern.
Large 5.9L Fluid Reservoir: Includes a generous 5.9-liter plastic tank to guarantee a steady, reliable supply under extreme racing or track conditions.
Bosphorus Innovations Stage 4 PWM Water/Methanol Injection Kit (Standalone ECU & PWM Mapped)
Designed for professional motorsport applications and advanced engine management setups, the Stage 4 PWM Water/Methanol Injection Kit puts total fluid delivery control into your standalone ECU. By utilizing pulse-width modulation (PWM) across 2D or 3D maps driven by TPS, MAP, or engine load, the system delivers precise quantities of water-methanol mist to drastically lower manifold air temperatures and exhaust gas temperatures (EGT), protecting pistons from thermal failure while maximizing octane levels.
Uncompromising Durability & Flow Equipped with a pulsation-free high-pressure diaphragm pump featuring an internal bypass mechanism, the Stage 4 PWM kit eliminates pressure oscillations for a steady stream. All metal components are constructed from corrosion-resistant nickel-plated brass, standard brass, and EPDM-grade plastics certified for 100% methanol durability.
Key Benefits & Features
Combustion Efficiency: Enhances dynamic compression and burn efficiency while reducing harmful emissions (CO, CO2, NOx, and HC).
Complete Professional Package: Includes a 5.9-liter plastic tank, controller with wiring harness, 6 meters of injection tubing, 40-micron stainless steel inline filter, and check valve.
2-Year Warranty: Backed by Bosphorus Innovations’ comprehensive guarantee against manufacturing defects.
Nozzle Selection Guide
100% Water: 10–15% Water-to-Fuel ratio or 0.5–1 cc per HP
50% Water / 50% Methanol: 15–20% Mixture-to-Fuel ratio or 1–1.5 cc per HP
100% Methanol: 20–25% Methanol-to-Fuel ratio or 1.5–2 cc per HP
(Default configuration: 252 ml/min [4 GPH] nozzle and Red Hose if no specific size/color is indicated before ordering).
Technical Specifications
Application: Standalone ECU Controlled Vehicles (PWM Compatible)
Activation Type: Programmable via Standalone ECU (2D/3D Maps: TPS, MAP, or Engine Load)
Tank Capacity: 5.9 Liters / 1.56 Gallons (Plastic Tank)
Hose Length: 20 FT / 6 Meters (¼” OD injection tubing)
Warranty: 2-Year Manufacturer Defect Warranty
Package Contents
High-Pressure Diaphragm Pump with 2 x Pump Fittings
Injection Nozzle & Nozzle Mounting Bung
40-Micron Stainless Steel Filter & Check Valve
1/8″ NPT – ¼” Compression Hose Fitting
Controller with Wiring Loom
5.9 Liter Plastic Tank with Cap and 1/8″ NPT Tank Fitting
20 FT / 6 Meter ¼” OD Injection Hose (Red or Blue color options)
Electrical Hardware (2 x Fully Insulated Butt Connectors, 1 x Fully Insulated Ground Connector)
Mounting Hardware (5 x Zip ties, 2 x Tank Screws & Washers, 4 x Pump Screws & Washers)
Decal Set (3D Sticker, 8.5×4.5cm sticker, 2 x 5×2.5cm stickers)
Installation Manual
| Weight | 3 kg |
|---|---|
| Dimensions | 30 × 25 × 12 cm |
| Hose Color & Type | Nylon Blue, Nylon Red, PTFE-Durable |
| Tank Size | No Tank, Small Size 3 Lt/ 0.8 Gallon, Standard M Tank 5.9 Lt/ 1.58 Gallon, Low Profile 5 Lt/ 1.32 Gallon, L Tank 10 Lt/ 2.64 Gallon, XL Tank 20 Lt/ 5.28 Gallon |
| Mounting Location | Remote Mount – For vehicles with limited space, Standard Mount – For vehicles with ample space, V-Engine Mount – For dual-nozzle hose setups |
