Haltech E6K - Manual (Page 120)

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B.3.2 Sequential Outputs
The E6K can run full sequential on an engine with up to four cylinders. When the Ign / By is
set to 1 in the Fuel Set-up, injection will occur once per engine cycle (every second
revolution) for each channel. The output channels used and the order of injection are :
Channel 1 INJ1/INJ2
Channel 2 INJ3/INJ4
Channel 5 Digital Out 2
Channel 4 Digital Out 1
If you have less than 4 cylinders, you will not need all four outputs. A 3 cylinder engine, for
example, will only use channels 1, 2 and 5. Channel 4 is then left available as a Digital
Output.
The E6K can only provide 4 fuel outputs, therefore it cannot control each cylinder’s injection
on an engine with more than 4 cylinders. For 6 or 8 cylinder engines, the E6K can operate in a
semi-sequential mode. With the Ign / By set to 2, each injection will occur once per engine
cycle. The injectors need to be paired to cylinders adjacent in the firing order. For example,
on a six cylinder engine with firing order 1-5-3-6-2-4, the injectors would be paired to fuel
channels as follows :
Channel 1 INJ1/INJ2 cyl 1 and cyl 5
Channel 2 INJ3/INJ4 cyl 3 and cyl 6
Channel 5 Digital Out 2 cyl 2 and cyl 4
Channel 4 is not used for fuel and is therefore left available as an Digital Output.
The Sequential Injection Mode on a 12 cylinder engine is not really sequential at all, but a
form of extended Batch Fire. The E6K will fire the injectors as three groups of four injectors
(uses three outputs.) With the Ign / By set to 2, the injectors will each fire once per revolution.
This injection mode has proved useful in reducing fuel pressure fluctuations in the fuel rails
on V12 engines. The Individual Injector Trim is still applied to each channel, so group the
injectors by flow rate and set an appropriate correction.
Sequential injection on 5 and 10 cylinder motors is not possible with the E6K.
Important Notes
1. The E6K as yet has no means of programming the firing order of the engine in software. It
uses the channels sequenced in the order mentioned previously. Therefore, it is necessary to
wire the injectors according to the firing order.
2. The Sequential Injection Mode cannot be used in conjunction with Direct Fire Ignition
Mode except on 1 or 2 cylinder engines unless an optional ignition toggle is used in which
case 4 cylinder direct fire waste spark is possible. If both modes are selected with more than
2 cylinders, the E6K will choose the ignition function in preference to the fuel function.
3. The Appendix B.10 Summary Table should be consulted to determine if a particular
configuration is possible.