Haltech E8 - Manual (Page 107)

Haltech E11/E8 Instruction Manual
Turbo Wastegate Control
Description
The wastegate of a turbo is operated when the manifold pressure acting on the diaphragm within the
wastegate actuator overcomes the return spring allowing exhaust gas to bypass the turbine. With
electronic boost control, the object is to use a pulsating solenoid to bleed off the manifold pressure signal
seen by the waste gate unit so that it can see only a fraction of the manifold pressure. The solenoid
operates at constant frequency and the duty cycle is altered to control the drop in pressure signal through
the device.
Figure 108 - Turbo Wastegate Control Plumbing
Setting Wastegate control
See Auxilary outputs section for details on how to setup wastegate control.
Tuning the Wastegate map (open loop boost control)
Figure 109
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Solenoid
Duty
Cycle
(Height)
Load
(Bars)
RPM
(Ranges)
Note: Be sure to use air hose that is rated to the expected boost pressure. All fittings
should be secured so that they will not disconnect under high pressures