Turbosmart BOOST CONTROLLERS – ELECTRONIC - e-Boost2 (2005-current) – Complete User Manual - Manual (Page 23)

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SSD (Sequential switching function D): Sequential switching function D is an advanced boost level switching function where you can
configure a time delay to give either a drop in boost or a spike between switching boost levels. For example in a drag racing application
you may want lower your boost during launch to maintain traction and spike your boost during gear changes to compensate for a drop in
RPM.
EXAMPLE 1: BOOST DIPPING BETWEEN BOOST LEVEL SWITCHING
 Earthing the green wire will scroll up through set points starting at SP1 up to SP6 one at a time.
 Earthing the orange wire will reset and return to SP1 and dS1 (launch time delay)
 Activating SSD will display dS1-6 in their respective boost groups.
 These time intervals (dS1-6) can be used to give a dip in boost or spike in boost during the time delay.
 To create a dip in boost set the gate pressure to zero of the boost group that you are switching to. For example to dip the
boost in the launch sequence set GP1 to zero as shown on the diagram below and define how long you want the boost to dip
for in the time interval parameter dS1. To dip the boost when switching between boost levels eg between SP1 and SP2 set
GP2=0 and dS2 equal to the amount of time you want the boost to dip for. The solenoid is in fact turned off during the time
delay so the waste gate actuator is seeing manifold pressure. You will need to tune the time delay so that your boost does not
drop too far during this time delay.
 dS1 and SP1 will be active after a reset by earthing the orange wire through a switch.
 The first time interval will start once the green wire has been earthed and un-earthed. If this switch is setup on a clutch
mounted the launch time delay dS1 will start when the switch is opened again. On a clutch mounted switch this could be when
clutch is released for launch.
 After the time delay associated with dS1 has elapsed, SP1 will continue to be active.
 SP2-6/dS2-6 will be triggered when the green wire is earthed through a switch. For example if the time delay is between gear
changes the time will start when switch is closed e.g. on clutch mounted switch when clutch is depressed for the gear change.
 During the time delay the solenoid will be off hard (i.e. actuator seeing manifold pressure) if the gate pressure has been set to
zero. Once the time delay has elapsed the boost level will switch to the subsequent set point boost level.
Example Boost Curve - boost dipping
Orange - Reset
Green – Trigger to
Launch or up SP
Time
SP1
GP1=0
BOOST
SP1
SP2
SP3
SP4
SP5
SP6
dS1 dS2 dS3 dS4 dS5 dS6
GP2=0 GP3=0 GP4=0 GP5=0 GP6=0