Haltech E6A - Manual (Page 104)

104
There are two ranges to the Rotary Trailing Map, below 2000 rpm and above 2000 rpm. This
map is a measure of split, or delay, from the leading spark, which is computed from the base
ignition map normally with all corrections. The map indexes split against the engine load.
When displayed on the Engine Data Page, or in datalogs, the trailing spark timing is shown as
an absolute advance in degrees BTDC.
If using a distributor, there are two ignition outputs, one for the leading and one for the trailing
coils. If using direct fire, the two leading sparks are fired together, as in a waste-spark set-up.
Two individual coils must be used for the trailing sparks, as these are fired separately. Each
coil igniter will have its own trigger. If using direct fire, a Home signal is needed for trailing
ignition to be generated.
Distributor Direct Fire
Output Function Function
INJ1/INJ2 Fuel (Primary) Fuel (Primary)
INJ3/INJ4 Fuel (Secondary) Fuel (Secondary
IGN OUT Leading Spark Leading Spark (both)
AUX OUT 1 Trailing Spark Trailing Spark front rotor
AUX OUT 2 Auxiliary Output Trailing Spark rear rotor
Expanded Mode
Since direct fire on rotary engines will rob the E6A of an auxiliary output to run one of the
programmable functions (all five outputs used: two for fuel, three for ignition), a special
configuration may be used to “steal” one of the fuel injector drivers to run a different function.
By moving jumpers on the circuit board, the injector driver on INJ2 can be isolated from
Output Channel 1, which would then control INJ1 alone. INJ2 is then controlled by Output
Channel 2, and is used for Primary fuel injection. The Bypass line is employed internally as a
staging signal to enable INJ3 and INJ4 as secondary injectors. Thus Output Channel 1 on INJ1
is free to run an auxiliary function. Note that the function list is now limited: the Turbo Timer,
NOS and Torque Convert Clutch functions cannot be used since each requires use of the
Auxiliary Input/Output line.
An output summary for expanded mode operation follows. This configuration has been
designed specifically for 13B turbo rotary engines with two primary and two secondary
injectors, with the limitation that the primary injectors do not require high opening currents.