DevilsOwn is a manufacturer and specialist supplier of water and methanol injection systems for performance vehicles. Its product range is designed primarily for turbocharged and supercharged gasoline and diesel engines, with systems intended to cool intake charges, suppress detonation, and support higher boost and ignition timing when properly configured and tuned.
The company offers complete injection kits as well as individual components, including high-pressure pumps, injection nozzles, controllers, tanks, tubing, filters, valves, fittings, wiring, and monitoring equipment.
Water/methanol injection is an established performance technology used in modified street vehicles, drag cars, racing applications, and other high-performance engines. DevilsOwn has built its product line around providing the hardware required to deliver the fluid into an engine’s intake system in a controlled manner.
What Is Water/Methanol Injection?
Water/methanol injection involves spraying a finely atomized mixture of water and methanol into an engine’s intake system.
When the injected liquid evaporates, it absorbs heat from the intake charge. This can reduce intake-air temperatures and help control combustion temperatures. Methanol also has a high octane rating, contributing to the system’s ability to resist detonation.
Detonation, sometimes called knock, occurs when combustion takes place in an uncontrolled manner because of excessive heat and pressure. In forced-induction engines, higher boost levels can increase the likelihood of knock, particularly when intake temperatures become elevated.
Water/methanol injection can therefore provide an additional method of controlling temperatures and detonation in appropriately configured engines.
How a DevilsOwn System Works
A typical DevilsOwn system begins with a reservoir containing water, methanol, or an appropriate water/methanol mixture.
A high-pressure pump moves the fluid through the system toward an injection nozzle. The nozzle then atomizes the liquid into the intake stream.
Depending on the system, injection can be triggered by boost pressure, engine-management signals, throttle position, airflow measurements, or other configured inputs.
The company’s DVS4 system, for example, uses a progressive controller capable of responding to signals from an internal or external MAP sensor, AFM, or TPS. It can control pumps, valves, tanks, and failsafe systems.
This progressive approach allows injection volume to increase according to engine demand rather than simply switching the system fully on or off.
Water and Methanol as Cooling and Detonation-Control Fluids
Water and methanol perform somewhat different functions within an injection system.
Water has a high latent heat of vaporization. As it changes from liquid to vapor, it absorbs substantial heat from the surrounding intake charge. This makes it particularly useful for cooling.
Methanol contributes cooling as well while also providing a high-octane component. DevilsOwn’s system documentation states that its systems can operate with mixtures ranging from distilled water through methanol/water combinations and, for certain systems, up to 100% methanol. The manufacturer commonly recommends a 50/50 water/methanol mixture.
The correct mixture and injection rate depend on the engine, system configuration, tuning strategy, and application.
DevilsOwn Injection Kits
DevilsOwn offers complete systems at different levels of complexity.
Stage 1 Systems
The Stage 1 system is designed as a relatively straightforward solution for turbocharged or supercharged vehicles.
The current Stage 1 kit includes components such as a high-pressure pump, adjustable pressure switch, injection nozzle, nozzle holder, check valve, filtered tank tap, high-pressure tubing, wiring, relay, fuse holder, and installation hardware.
This type of system can be suitable for users looking for a simpler water/methanol injection setup without the more advanced control features found in progressive systems.
DVS3 Progressive Systems
DevilsOwn also offers progressive systems that provide more sophisticated control over injection.
The current DVS3 range includes a progressive kit with an LCD screen. These systems are designed for turbocharged and supercharged gasoline or diesel vehicles where users want greater control over the injection process.
Progressive control can allow the amount of fluid being injected to increase with engine load or boost.
DVS4 Progressive System
The DVS4 represents a more configurable system in the DevilsOwn range.
Its controller includes an LCD display, wide input-voltage capability, an internal MAP sensor supporting up to 60 psi, and compatibility with an external MAP sensor for higher pressure applications. It can also accept AFM or TPS signals.
One of its notable features is the ability to manage more than one injection circuit. Depending on configuration, it can support multiple pumps, valves, tanks, and failsafe devices.
This makes it suitable for applications where a basic single-nozzle system is not enough.
High-Pressure Pumps
The pump is one of the most important components in a water/methanol injection system because it must deliver fluid at sufficient pressure for effective atomization.
DevilsOwn offers pumps with pressure capabilities up to 300 psi.
One of its current 300-psi pumps has adjustable pressure from 100 to 300 psi, a built-in bypass valve, thermal protection, an anti-reverse check valve, and EPDM seals. The manufacturer states that the pump is compatible with methanol and can self-prime up to five feet.
A higher-flow 300-psi pump is also available, with DevilsOwn listing substantially higher flow capacity and horsepower-support figures for different water/methanol mixtures.
These specifications make pump selection an important part of matching an injection system to an engine’s requirements.
Injection Nozzles
The nozzle determines how the water/methanol mixture is introduced into the intake.
A well-designed nozzle should produce a consistent spray pattern and sufficiently fine droplets for effective atomization.
DevilsOwn offers different nozzle sizes so that injection volume can be matched to an engine’s displacement, horsepower, boost, and system configuration.
The company describes its nozzles as producing an approximately 80-degree spray pattern and uses corrosion-resistant construction for compatibility with water/methanol mixtures.
Choosing the appropriate nozzle size is important. An undersized nozzle may not provide the desired cooling effect, while excessive injection can create other operating problems.
Controllers and Progressive Injection
A progressive controller is essentially the control center of a sophisticated injection system.
Instead of activating the pump at one fixed point and maintaining a constant injection rate, a progressive controller can vary pump output according to engine demand.
Earlier DevilsOwn systems such as the DVC-30 were designed to convert MAP-voltage information into a boost value and progressively increase pump duty cycle as boost rose.
The newer DVS4 system expands on this concept with multiple inputs and outputs, allowing substantially greater customization.
Progressive control is particularly useful for engines that operate across a broad range of boost levels because the amount of injected fluid can correspond more closely to the engine’s operating conditions.
Tanks and Fluid Storage
A water/methanol system requires a dedicated reservoir for its injection fluid.
DevilsOwn offers tanks in different capacities, along with tank taps, filters, breather components, and other accessories.
Tank design can be important in performance applications because hard acceleration and cornering can cause fluid to move around inside a reservoir. Earlier DevilsOwn systems have used tank designs incorporating features intended to reduce fluid movement and prevent pump starvation.
The reservoir should also be installed in a location that provides secure mounting and appropriate access for refilling and maintenance.
Filters and Check Valves
Clean fluid delivery is essential for a water/methanol injection system.
Small contaminants can restrict injection nozzles, making filtration an important part of the system.
DevilsOwn offers filtered tank fittings and other filtration components. Its systems also use check valves and, where appropriate, solenoids to help control fluid movement through the injection lines.
These components can prevent unwanted fluid flow when the injection system is inactive.
Failsafe Protection
Water/methanol injection can be beneficial when properly functioning and tuned, but the system becomes another component that must operate correctly.
For this reason, DevilsOwn’s more advanced systems incorporate failsafe features.
The DVS4 can work with pressure-based failsafe devices and other monitoring arrangements. Its architecture can monitor multiple parts of the injection system depending on configuration.
A failsafe system can be particularly important on engines that have been tuned to take advantage of water/methanol injection. If the engine calibration relies on the cooling or octane benefits provided by injection, a failure of the injection system needs to be detected and addressed appropriately.
Claimed Performance Benefits
DevilsOwn states that its water/methanol injection systems can provide several performance-related benefits.
The company lists potential reductions in intake-air temperatures, lower cylinder temperatures, reduced effects of heat soak, and the ability to run increased boost and ignition timing when the system is correctly configured. It also advertises horsepower increases in the range of 10–15 percent for its systems.
Actual results are not universal.
The performance effect depends on the engine, baseline tune, fuel, boost level, injection mixture, nozzle selection, ambient conditions, and calibration. Water/methanol injection itself does not automatically produce a specific horsepower increase on every vehicle.
A properly tuned engine is necessary to take advantage of the additional cooling and knock resistance.
Supporting Higher Boost
Forced-induction engines can benefit from additional charge cooling.
Turbochargers and superchargers compress intake air, and compression raises its temperature. Intercoolers are normally used to reduce that temperature before the air enters the engine.
Water/methanol injection can function as an additional cooling mechanism.
By reducing intake-charge temperatures and helping control detonation, injection may allow a properly tuned engine to operate at higher boost levels than it could safely tolerate under the same conditions without additional cooling and knock resistance.
However, higher boost also increases mechanical and thermal stress. Water/methanol injection should therefore be considered one component of an overall performance strategy rather than a substitute for appropriate engine hardware and tuning.
Applications for Performance Vehicles
DevilsOwn systems are intended for a range of turbocharged and supercharged vehicles.
Applications include:
- Modified street cars
- Drag vehicles
- Track cars
- Turbocharged gasoline engines
- Supercharged gasoline engines
- Performance diesel engines
- Highly modified competition engines
The manufacturer states that its kits can be used on both gasoline and diesel turbocharged or supercharged applications.
Different applications require different nozzle sizes, pump capacities, injection strategies, and controller settings.
Importance of Proper Tuning
Water/methanol injection should not be treated as a simple bolt-on modification that automatically increases horsepower.
The amount and timing of injection must be appropriate for the engine and its existing calibration.
Performance publications have emphasized that the additional power associated with water/methanol injection comes from being able to safely optimize factors such as boost and ignition timing rather than from the liquid alone.
For modified engines, professional tuning can help ensure that the injection system, fuel system, engine-management calibration, and safety mechanisms work together.
This is particularly important for high-output applications.
Components and Accessories
In addition to complete kits, DevilsOwn’s product range includes individual components for building or upgrading systems.
These include:
- Water/methanol pumps
- Injection nozzles
- Nozzle holders
- High-pressure tubing
- Tank taps
- Filters
- Check valves
- Solenoids
- Controllers
- Pressure switches
- Failsafe equipment
- Display modules
- Wiring harnesses
- Tanks
- Fittings
- Breather kits
- Ultra-pure water
This component-based approach allows users to configure systems around different engine requirements and upgrade existing installations.
DevilsOwn and Engine Cooling
The cooling function of water/methanol injection is one of the central reasons for using the technology.
When the injected fluid evaporates, it absorbs heat from the intake charge. Lower intake temperatures can reduce the tendency toward detonation and provide more favorable conditions for a forced-induction engine.
DevilsOwn specifically markets its systems around lowering intake and cylinder temperatures and reducing heat-soak effects.
The actual temperature reduction depends on the vehicle, environmental conditions, injection rate, fluid mixture, and other components of the engine’s cooling and induction systems.
DevilsOwn in the Performance Market
DevilsOwn occupies a specialized segment of the automotive aftermarket focused on water and methanol injection.
Rather than being a general automotive parts company, its product range is concentrated on the components required to design, install, control, and maintain injection systems.
Its current catalog demonstrates this specialization, ranging from individual fittings and pumps to complete progressive kits with electronic controllers and failsafe functions.
This focus allows the company to serve both users looking for relatively simple systems and performance enthusiasts building more sophisticated installations.
Conclusion
DevilsOwn is a specialist manufacturer and supplier of water and methanol injection systems, pumps, controllers, nozzles, tanks, and accessories for performance vehicles.
Its systems are designed around the principle of introducing a controlled water/methanol mixture into the engine’s intake system to provide evaporative cooling and additional resistance to detonation. The potential benefits include lower intake temperatures, reduced heat soak, and greater flexibility for properly tuned engines operating at elevated boost and ignition timing.
The company’s product range includes straightforward Stage 1 systems as well as more advanced progressive platforms such as the DVS4, which can control multiple pumps, valves, tanks, and failsafe systems. Its high-pressure pumps, injection nozzles, filters, check valves, tanks, tubing, and other components allow systems to be configured for different engine outputs and applications.
For performance enthusiasts, water/methanol injection can be a useful component of a broader engine-performance strategy. However, results depend heavily on proper system sizing, installation, engine management, and tuning. The technology is most effective when the injection system and the engine’s calibration are designed to work together.
With its specialized focus on water/methanol injection hardware, DevilsOwn has established a product line aimed at drivers and tuners looking to manage intake temperatures and detonation while supporting the demands of modified and high-performance engines.