Gastec FP50 Series Installation Instructions Manual

HIGH PERFORMANCE FUEL PROCESSOR MODEL FP50
3 Models:
FP50-DS-SS (Dual Start with Safety Switch)
FP50-DC (Changes over on Deceleration with Safety Switch)
FP50-AC (Changes over on Acceleration with Safety Switch)
FP50 Features:
• High Performance Microprocessor running at 20Mhz with 14 bit wide instructions;
• 286 microsecond worst case loop times (this gives the mathematical power to calculate
the exact air/fuel ratio in real time);
• Two different air/fuel ratios — one for increased engine power during acceleration (and
when under constant heavy load) and a second to provide excellent economy while
cruising. This makes the FP50 an excellent choice for vehicles that tow heavy loads yet
require maximum economy;
• Adjustable Rev-Changeover point (FP50-DC & FP50-AC models);
• Adjustable Dual Fuelling when changing from petrol to LPG/CNG (all models);
• Inbuilt Safety Switch that accepts signals from vehicle coil, tachometer, or flywheel;
• Fuel Injector Emulation (Optional - Simple Resistive);
• Rich/Lean Lambda Tuning Lights;
• Oxygen Sensor Emulation.
The mathematical calculations required to ensure fast air/fuel compliance are carried out by
a high performance microprocessor. Acceleration override and air/fuel calculations are given
priority. Usual minimum petrol injector pulses are in the vicinity of 2 milliseconds compared
to the FP50's worst program loop times of 286 microseconds. The FP50 is therefore able to
calculate the required air fuel ratio 6.9 times faster than the minimum petrol injector pulse.
This places the FP50 in a new
performance class which is
only exceeded by electronic
fuel injection systems.
Before Proceeding -
The FP50 Fuel Processor
requires an Oxygen Sensor
input, a Throttle Position
Sensor input and a Pulse
input. This processor should
not be installed if these three
inputs are not available.
Optional Resistive Emulation
is available as are separate
complex emulators. Please
seek further details from
your distributor before
installing if you are unsure
of its suitability.
Suitable for 1.3 to 6.2 litre vehicles
The processor drives a high quality stepper valve (CV30) to
control the gas mixtures accurately via a 90 degree rotational
barrel. This valve operates continuously whilst driving on LPG or
CNG. The slotted barrel rotates slowly to achieve the exact air fuel
ratio required - unless it receives an increased load signal from the
throttle position sensor (in which case it opens very much faster).
The CV30/CE30 is made with brass sintered bearings and
contains no gears or worm drives to wear out. The design life
of the valve is in excess of 500,000km.
(C) GASTEC Corporation December 2009
www.gastec.ws
rd
(3 Edition)