Turbosmart BOOST CONTROLLERS – ELECTRONIC - e-Boost STREET 30psi Manual - Manual (Page 7)

7
SOLENOID HOOK UP METHODS
WARNING! Changing to different connection method 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 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 methods
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 cannot be used to obtain a boost pressure lower than the standard waste gate actuator’s pressure setting. This is usually 7 PSI.
 Some waste gate actuators have two inlet fittings, eg Toyota GT4 (All-Trac) Celica, MR2, JZA80 Supra. Identify the hose that
connects from the factory boost control solenoid to the waste gate actuator, and block both ends of this hose.
 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 (For basic single internal wastegate turbocharger setups)
 Port (1): vents pressure from the solenoid. Connect a short piece of the silicon hose and face the vent downwards to stop
water or debris entering the solenoid or connect to the air filter box.
 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.
Single solenoid, twin parallel turbocharger hook up (For straight configuration twin parallel turbocharger engines E.g. RB26DETT)
 The E-Boost Street is capable of controlling twin internal wastegate turbochargers with a single or twin solenoid for a V
configuration engine.
 This method is used when the turbochargers are mounted close to each other allowing the solenoid to be mounted close to
both actuators
 Each solenoid port is connected as follows:
Port (1): vents pressure from the solenoid. Connect a short piece of the silicon hose and face the vent downwards to stop water or
debris entering the solenoid or connect to the air filter box.
Port (2): to tee piece that feeds both actuators
Port (3): to pressure only source
Wastegate Actuator
Turbocharger
Solenoid
Port 1 of solenoid vent
to atmosphere
Pressure only source to
Port 3 of solenoid
Port 2 of solenoid to
actuator
Second port must be
block (if fitted)