5
Note: If your vehicle is fitted with a factory boost control solenoid, the hoses that run from the pressure source and to the
wastegate actuator must be disconnected. Leave the solenoid plugged into the wiring loom so that the ECU is not affected.
Failure to disable the factory boost control solenoid and hoses will result in erratic or fluctuating boost pressures which could
damage your engine.
INTERNAL WASTEGATE CONNECTION
WARNING!
Changing to different connection methods can cause a higher than expected increase in boost pressure. Turbosmart
recommends adjusting your boost controller back to its minimum setting and measuring the new minimum boost pressure achieved by
the new setup before increasing your boost again.
Note: If your vehicle is fitted with a factory boost control solenoid, the hoses that run from the solenoid to the pressure source
and to the wastegate actuator must be disconnected from the solenoid. Leave the solenoid plugged into the wiring loom so
that the ECU is not affected.
Most factory turbocharged vehicles use an internal waste gate system to control boost pressure. The E-Boost Street controls boost
pressure by controlling the pressure signal that the waste gate actuator receives from the turbocharger. Please note that the E-Boost
Street ca
nnot be used to obtain a boost pressure lower than the standard waste gate actuator’s pressure setting.
Some factory hoses have a small restrictor fitted inside them, if the factory hoses are reused over boosting or boost spiking may
occur.
Secure all connections with hose clamps.
Single solenoid, single turbocharger hook up
(Basic single internal wastegate setups)
Port (1): vents pressure from the solenoid. Connect this hose to the intake side of the turbo, between the air cleaner and the inlet
of the turbocharger. Otherwise connect a short piece of the silicon hose and face the vent downwards to stop water or debris
entering the solenoid.
Port (2): to the internal wastegate actuator
Port (3): to pressure only source
If you are unable to achieve your desired boost pressure, it is normally due to exhaust manifold backpressure forcing the internal waste
gate to open. To increase your boost pressure further, fit a higher pressure waste gate actuator to increase your minimum boost
pressure.
WARNING!
Fitting a higher pressure waste gate actuator may cause a higher than expected increase in boost pressure
.
Turbosmart recommends resetting the boost set point values to Zero and measure the new minimum boost pressure before increasing
your boost set point values.
Internal wastegates with 2 ports
Port (1): vents pressure from the solenoid.
Port (2): connect to one of the ports of the actuator
Port (3): to pressure only source
Block off unused port on the actuator with suitable blank
Turbocharger
Solenoid
Port 1 of solenoid vent
to atmosphere
Pressure only source to
Port 3 of solenoid
Port 2 of solenoid
to actuator
Actuator
Pressure only
source to port 3
of solenoid
Port 1 of solenoid vent
to atmosphere
Port 2 of solenoid
to actuator
Block off unused
port
