Turbosmart BOOST CONTROLLERS - Dual Stage Boost Controller - Manual (Page 4)

4
SETTING BOOST PRESSURE
IMPORTANT NOTES ON BOOST PRESSURE ADJUSTMENT
• Adjustment to your boost controller is made by rotating the Boost Dials
• Rotate in a clockwise direction to increase boost and the reverse direction to decrease boost
• Before making any adjustment, the Boost Dials will need to be fully closed (anti-clockwise)
Step 1: Apply full load to the engine in a high gear (at least 3
rd or 4 th gear) at full throttle and note the boost pressure
Step 2: To increase the low boost setting, rotate the Low Boost Dial clockwise (maximum of 1 complete revolution at a time)
Step 3: Apply full load to the engine and note the boost pressure
Step 4: Compare the actual boost pressure with the desired boost pressure. If the actual pressure is below the desired pressure,
return to step 2. If the actual is above the desired boost then decrease by rotating the Boost Dial anti-clockwise and return
to step 3.
Step 5: Once the low boost setting is complete, follow step 2 to step 4 on the High boost dial.
BOOST SPIKING
If boost spiking occurs and is undesirable for your application, the gate system can be removed to give you a less aggressive boost
curve. This modification is only required in a minimal number of applications.
IMPORTANT NOTES ON GATE SYSTEM REMOVAL
The gate system can be removed by the following steps.
Perform this modification on a clean bench so that the ball and spring are not lost
•
Allow the engine to cool down before removing the boost controller from your vehicle
• Identify the input nipple with the restrictor at the end on the DSBC tee piece. Loosen the input nipple and remove the ball and
spring.
• Check that the internal air passages are clear and free from debris
• Re-install the boost controller by following the instructions for your setup
• You will need to re-adjust your boost settings after the removal of the gate.
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TROUBLE SHOOTING
The following points should be checked if you find that your engine is developing excessive boost, the boost pressure is fluctuating or
the desired boost level cannot be achieved. Please note, the following checks will cure 99% of problems experienced when fitting a
Turbosmart boost controller.
•
Check that the boost controller is installed so that the arrow points toward the wastegate actuator
• Check the joining hoses for splits, cracks or loose connection and are the correct size for the application
• Check to see if the boost controller is blocked or contaminated with dirt or debris
• Ensure that there is nothing but the boost controller in the hose between the pressure source and the wastegate actuator, ie tee
pieces for boost gauge or to factory boost solenoid.
• Pressure test the wastegate actuator for leakage, the diaphragm or housing may be cracked or split
• Check that the wastegate is operating correctly
Boost spike curve
Ideal boost curve
Input Nipple with
small hole
Ball
Spring
Wastegate Arrow
Drawing 4
DSBC Tee piece