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Insert a blurb here about Haltech Engine management comptuers,
what they do, why they're important and what dion
can do
Qualified Haltech Specialist
Insert text here to compliment the title with emphasis on Dion knowing
what he's doing with the haltech components. Insert
a haltech logo on the left here or below
Tune up the power
Having an aftermarket ECU requires the correct tuning of the ECU. Dion's
is specifically trained and has a vast range of
experience with Haltech installations on a wide
variety of performance vehicles. In tandem with
dyno tuning, Dion is able to maximise your total
power output safely, and in the process, smoothen
out your power and torque curves by modifying the
program in the ECU to compensate for flat points
in acceleration.
Same thing but does more. Alot more! The introduction of a Haltech ECU replacing a
stock ECU wil easily allow your engine to develop
more power, and can be fine tuned to maximise the
power delivery across your rev range or at specific
areas.
Flick of a switch settings are
available for turbo applications using Haltech
ECUs. The ability to flick between power and
ecomony modes, or low and high boost settings
while still running at correctly tuned optimal
settings.
Adjustable revlimiters with electronic
activation of both a rev limit and shift lights
offer flexibility during spirited driving
Eliminate your restrictive
AFM sensor and replace
it with a Map sensor on your engines intake
tract. Less restrictions on the intake result in
more power being generated by the engine
Greater precision and more
accurate fuel maps. Stored fuel
maps in the Haltech ECU offer a far greater
tuning precision so your cars idlling,
cruising and racing performance is increased
massively. Rough idle on engines with lumpy
cams or enlarged throttle setups can be
elimiated, as the resolution of stock ECU
fuel maps isnt detailed enough to compensate
for the extra air being fed to the engine.
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Understanding EFI Fuel Management
EFI computers have several modes of operation. These modes are determined by the output power needed from the engine's operating conditions:
Closed Loop Mode
The ECU measures teh air/fuel ratio (A/F) from the O2 (or lambda) sensor. THe ECU works to maintain a constance A/F ratio (14.7:1). This ratio is optimal for the catalytic converter to reduce exhaust emisions correctioly. Also, an 14.7 A/F ratio is the ideal sweet spot for the lambda sensor to work accurately, and this gives a good feedback signal.
Open Loop Mode
This differs from closed loop mode as the lambda sensor signal is ignored. The ECU controls the fuel injectors wihtout feedback that the calculated fuel delivery rate matches what the engine receives. Without feedback, the loop is open, there by giving the term "open loop."
Power Enrichment Mode
This only occurs at Widoe Open Throttle (WOT) and is only determined by the Throttle Position Sensor (TPS) from about 60% wot onwards. The ECU in this mode, ignores the lambda sensor and forces a richer A/F ratio than 14.7:1. This is becuase engines develop more power with a slightly richer mix. This is the area that modifiers are most concerned with.
Lean Cruise Mode
This mode can only used be used at light loads when the vehicle speed is above a certain value, for example 100kph cruising. The ECU instructs a leaner A/F ratio, increases spark advance, and occasionally returns to closed loop mode to assess itself.
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