Aquamist HFS-6 Water/Alcohol Injection System The HFS-6 is the most advanced water/alcohol injection system in the world. No other system can match it's injection capabilities, fail-safe features or reliability. Here are some of it's features: * Injects based on Injector Duty Cycle with optional Boost Compensation * Operates like a modern FI system. The pump runs at 160psi constant pressure and a Fast Acting Valve(FAV) controls injection * Includes a turbine flow sensor for accurate measurement of injection and actuation of fail-safe mechanisms * RJ-45 connections for ease of wiring * Fully adjustable fail-safes for sensitivity and duration Each of these features will be further explained below. Injecting based from injector duty cycle is the most precise method of water/alcohol delivery. The injected mixture must be proportional to load and fuel delivery otherwise the air/fuels ratios will not remain consistent robbing power or worse, damaging the engine. Using a input such as boost or a MAF signal to inject a water/alcohol mixture into an engine will result in over/under injection and poor repeatability. These signals are just a few of many signals the engines ECU uses to calculate instantaneous load and inject precise amounts of fuel. Using only one of these signals to inject water and/or a supplementary fuel into the engine is poor practice. The modern automobile fuel injection system operates as a constant pressure system, sometimes incorporating a rising rate fuel pressure regulator. Fuel delivery is controlled by actuation of precise injectors. The Aquamist HFS-6 uses the same principle for fluid injection. A constant pressure pump of 160psi is turned on just before an injection event starts to ensure the system is at proper pressure. Then a fast acting valve(FAV) is operated to precisely control the injection of fluid into the engine. There is never any sputtering of the jet as with pump speed based systems, nor any over run of the pump during gear changes pumping excess fluid into the engine. The HFS-6 uses a purpose built turbine flow sensor for measurement of the injected fluid. This flow sensor has been proven over years of use and refinement to be extremely accurate and robust in this application. In conjunction with the electronics the user can set precise injection windows defining the safe operating range of flow for the application. If the flow falls below, i.e. a blocked jet, or rises above, such as a system leak, the defined safe operating window, the the electronics will trigger the failsafe mechanism. This will change the state of a number of relays and contacts which the user can integrate with the ECU or, or example, waste gate solenoid, to prevent damage to the engine. All of the major components interface with the main control board by RJ-45 connectors. The only other connections that need to be made for the system to be operational is a power and ground connection for the main control board and a connection to one fuel injector. The fail-safe functions have both normally open and normally closed contacts for ease of interfacing with your engine management system. There is also a 5v digital contact for map switching in the ECU(if your EMS support this). The HFS-6 failsafe is also adjustable for sensitivity and duration. The sensitivity adjustment is to set how long the injection is outside the safe window before the fail-safe is activated. The duration adjustment is to set how long the failsafe remains activated once tripped. Above is an image of the HFS-6 control board Trimmers Explained: The Threshold Adjust sets the duty cycle at which the HFS-6 begins to inject. IDC Trim is is an offset function to scale the IDC of the HFS-6 up or down from the engines real IDC. IDC Gain is a scaling function that adjusts the slope of the HFS-6 injection. Boost Compensation lets the user add more duty cycle to the the HFS-6 injection based on boost.This adjustment operates off of a 0-5v reference. It is dependent upon the scaling of your MAP sensor. At full CCW the system will add DC from 0V. Set straight up, the system will add DC from 2.5V. And full CW this feature will be disabled as the setting will be not to add compensation until 5V. Failsafe Sensitivity is used to set how long the injection is outside the safe window before the failsafe mechanism is tripped. Failsafe Reset is used to adjust how long the fail-safe stays activated once it is tripped. Dimmer Adjust sets the brightness of the gauge when the vehicles headlamps are on. CONTACT US FOR INSTALL AND TUNING PACKAGES Support@FullBoostracing.com Part Number: 806 086
