Haltech E6M - Manual (Page 117)

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B.2.4 Converting Individual Coils to Waste Spark
One way of overcoming the problem of individual coils on 6 and 8 cylinder engines (and 4
cylinders if required) is to pair the cylinders up in the same way, but run 2 igniters (one for
each plug) to one ignition output. For example, on a six cylinder six igniters would be
required but only 3 ignition outputs, which is within the scope of the E6H/E6M.
B.2.5 Ignition Outputs
The E6H/E6M will always use its outputs in the same order. It will use up to 4 outputs, and
what outputs it does not use are available for other purposes. The output order is :
Channel 3 IGN OUT
Channel 4 Digital Out 1
Channel 5 Digital Out 2
Channel 1 INJ1/INJ2
B.3 Sequential Injection
Sequential injection allows fuel to be delivered to the engine at a time that produces best
combustion. Since this time is different for each cylinder, sequential systems inject fuel at
different engine angles for each cylinder. The Sequential Injection Mode of the E6H/E6M
will control up to four separate fuel channels. This provides full sequential for engines up to 4
cylinders, and semi-sequential for 6, 8 and 12 cylinders engines.
B.3.1 Sequential Features on the E6H/E6M
Injector Phasing
The timing (or phasing) of these injections is set via the Injector Phasing Map. This Map sets
the angle of the End of Injection, in degrees BTDC exhaust (not compression), against the
engine speed. This allows the injection to be completed before the inlet valve opens. The
E6H/E6M then times the start of injection, based on the trigger, so that the injection is
completed by the specified engine angle. If the E6H/E6M computes that there is insufficient
time to complete injection before the specified End of Injection time, then injection will
continue past this time.
Injector Trims
With multiple injector channels, it is possible to trim the fuel injection time to each channel.
The E6H/E6M has the ability to adjust each channel by ± 12.5%. This is meant primarily to
equalize distribution of fuel to individual cylinders due to limitations in inlet manifold design
or to ‘equalize’ flow rates between injectors with marginally different flow rates. These trims
are accessed through the Fuel Maps and Set-up Menu.