Aquamist High Flow System - 5
What you get:
- Custom heavy-duty Shurflo pump with 125psi internal
- 22cc surge arrestor and accumulator guarantees low
pressure ripple operation.
High speed PWM
valve ensures accurate flow control against
- Fast dynamic response time to LOAD and RPM transients
(PWM mirrors IDC)
- Consistent droplet size due to high system pressure
under all conditions.
- Powerful 150 Watt pump motor capable of maintaining
flow beyond 2 liters per minute.
- DDS3 (bundled) ensures flow is monitored constantly
for clogged jet or cut hose.
- 2x failsafe channels to perform advanced failsafe
tasks such as boost cut, map switch, etc.
- Water and methanol compatible (0-100%)
- All hoses and tank fittings, fasteners, water level
sensor electrical harness supplied
- 3x water jets: 0.8mm, 0.9mm and 1.0mm and one Y-piece.
We do not supply a water tank.
of the HFS-5 water/methanol injection system:
to maximize of effect of water/methanol injection, the
rate of delivery should be closely related to the real
time engine operating parameters. The first objective is
finding a signal that is comparable to the engine’s
cooling/octane demand at the exact moment in time.
the signal to match engine’s demand:
sensors such as throttle position, mass air flow and MAP
sensor are a prime signal source of engine load. But
without RPM reference, these sensor are only
representing only a two dimensional impression. For
example, MAF sensor without RPM reference only measures
air consumption, regardless of gearing or boost
pressure. The engine could be cruising at high speed
(less stress) or it can be travelling at 20mph in the
rally stage under extreme load and high temperature
stress. The same chuck of MAF signal cannot represent
the engine running conditions.
tracking fuel injector duty cycle:
help of the modern engine management system, the same
chunk of MAF signal, coupled up with a bunch of signals
gathered from sensors such as ‘air temperature’,
‘coolant temperature’ and ‘EGT’ (interpreting the lambda
probe’s heater element) and of course, engine speed. It
will make an informed judgment when to add or trim fuel
depending on the real-time operating environments. The
final decision made by the management will be reflected
by the duty cycle of the fuel injector. The HFS-5 uses
this IDC signal to meter flow.
the correct delivery method and hardware to complete the
ruled out the variable pump-speed delivery system for a
numbers of reasons. Due to the inertia of the rotating
mass, variable pump-speed system is not responsive to
the fast changing engine load at various throttle
openings and engine speed changes, especially during
gear shifts. Flow range is narrow due to limited
pressure span. It requires 4x the pressure change to
produce twice the flow change. Poor atomisation and
pulsation system pressure at low pump speed is an
inherent characteristic of such a system. Consistent
droplet size is vital to inlet cooling and even cylinder
chooses the well established method for fluid delivery:
was made to employ the ‘tried and tested’ delivery
system similar to a fuel injection system to meter fluid
flow. A 150W heavy duty pump is made specially for us by
Shurflo USA. Equipped with three 125psi internal by-pass
valves provides the system pressure. A surge
arrestor/accumulator refines the low-ripple further. A
high-speed stainless inline valve completes the line up.
The valve is capable of flow over a litre of fluid at
125psi. A dedicated controller reads the fuel injector’s
duty cycle % and channels it to the inline valve.
gauge displays the flow information from a digital
turbine flow sensor:
is serviced by the Aquamist’s proven DDS3 module,
designed to detect clogged nozzle and cut hose. Two
switched outputs provide the necessary interface with
device such as boost control valve and map switch
equipped engine controllers.
meets all criteria of a reliable and highly precise
fluid delivery system:
the HFS-5 is the only fluid delivery system that meets
the minimum requirement for achieving full integration
into your tuning programme with absolute precision,
tracking the fuel delivery is the most reliable method
to meter your water/methanol flow accurately under the
whole engine operating range. Anything short of this
means having to tailor your fuel map to compensate the
irregular fluid quantity ingested into the engine.
decided not to mirror the fuel flow in your future
upgrade programme, the HFS-5 system can read a PWM
output from a third party engine management controller
so a custom water/methanol map can be created.