7.8 Advanced Engine 7 ADDITIONAL ITEMS: BEYOND BASIC FUEL AND IGNITION CONTROL
7.8.11.3 Transbrake and throttle stop The MS3Pro can control many timed delay functions for bracket or drag
racing. The trans brake control applies the trans brake when you press the trans brake input button. When you
release the button, the trans brake will remain on for the delay time, then release. Launch control is enabled while
the trans brake is on, and releases at the same time as the transbrake. The throttle stop output switches on after
launch, stays on for a set time, then releases.
• Transbrake button input - Specify what input pin is used for the transbrake switch
• Transbrake output - Specify what output pin is used for the transbrake control.
• Delay - The time, in seconds, between releasing the transbrake input and releasing the transbrake.
• Turbo Staging Button - Press this button, and the MS3Pro will pulse the trans brake off and on, allowing
the car to creep forward while building boost.
• Release Time - How long to release trans-brake for on each move step. This should be set long enough to
move the car a little without gaining any speed.
• On Time - How long the trans-brake should be re-activated for between each step. This should be set long
enough to fully grab again.
• Main # Moves - How many moves (trans-brake release steps) on the first press of the button. Each subse-
quent press of the button gives a single move.
• Throttle stop output - Specify what output pin is used for a throttle stop.
• On delay after launch - The time, in seconds, between releasing launch control and the throttle stop turning
on.
• Keep on for - The time, in seconds, to keep the throttle stop active.
If using the trans brake without the staging feature, you can drive it with a conventional relay. A solid state relay will
give more precise release timing, and you will also need a solid state relay if using the turbo staging button feature
in order to pulse the trans brake off and on rapidly enough.
The wiring example on the next page shows Digital Switched In 3 as the trans brake button, Digital Switched In
2 as the staging button, and High Current Out 1 as the solenoid control output. This is just one example. You can
use any unused digital switched or frequency input for the button inputs (note that Digital Switched 12V In needs
to be wired to 12 volt switched power and not ground) and any unused high current, PWM, or injector output for
the solenoid control.
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 243
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