Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI System Hardware & BigComm Software - Manual (Page 100)

BigStuff3 Pro SEFI System
Version 2.1 – February 2011 93
63. Boost Staged
When “Staged” mode is selected the time intervals between the boost stages need to be configured. In
the Boost Parameters table above, these inputs are defined as Stage 1, Stage 2 and Stage 3. Before
the staged boost sequence can be enabled, 12 Volts needs to be present at the “Timer Enable” pin,
which is Pin A of the 4-way Boost connector on the main wire harness
Boost_Connector_Pin_Out . A
clutch switch or trans brake button should be wired between the timer enable pin and a 12-volt source.
A toggle switch can be added between the 12V source and the clutch switch or transmission brake
button to allow the timer enable pin to be turned on and off (see the illustration below)
In the example table below once 12V is applied to the “Timer Enable” wire, Stage 1 will be activated
one half (.5) seconds, Stage 2 will be activated after two (2) seconds, and Stage 3 will be activated
three and one half (3.5) seconds.
Note: Once the stages are turned on, they stay on until the TPS and/or RPM criteria are no longer true
or the Timer Enable goes low/off.
Note: The “Timer” sequence will be reactivated, every time the throttle is closed and then
opened again, since the “Minimum RPM and Minimum TPS criteria are re-satisfied.