7.8 Advanced Engine 7 ADDITIONAL ITEMS: BEYOND BASIC FUEL AND IGNITION CONTROL
7.8.6.1 Traction control settings
• Traction control - Allows turning traction control off or on.
• Method - Specifies what method is used to determine when to apply traction control.
• Enable input - If set to “off,” traction control is active full time (for VSS %slip) or active any time the launch
control system is used (for Perfect Run). This can specify an input pin used to arm traction control. If using
switched input, this is the pin used to trigger traction control.
• Light output - The MS3Pro can trigger an output pin to switch on a light when traction control is active.
• Minimum TPS - Specifies the minimum throttle position below which traction control is not applied.
• Minimum MAP - Specifies the minimum MAP reading below which traction control is not applied. (Not used
for Perfect Run)
• Minimum VSS - Traction control is not used below this speed. (Not used for Perfect Run)
• Driven - Specifies which speed sensor or combination of speed sensors to used for the driven wheels.
• Undriven - Specifies which speed sensor or combination of speed sensors to use for the non-driven wheels.
• Slip % setting - If set to “Fixed value,” you specify the maximum percent the drive wheel speed can exceed
the non driven wheel speed with the Slip Threshold % setting. “Adjustable” allows you to use an external dial
to change the slip threshold.
• Slip threshold - The maximum amount of wheel slip permitted in VSS % slip mode.
• Nitrous control - Current firmware only supports on/off. In on/off mode, nitrous is left on if the Nitrous Cut
curve is less than 40%, and cut if nitrous cut % is over 60%.
• Add fuel to - If using added fuel, specifies if this is applied to the first stage (Bank 1), secondary injectors if
used (Bank 2), or both.
7.8.6.2 Three and four wheel speed sensor traction control The VSS % slip requires at least two speed
sensors. On a motorcycle, any sensor beyond the first two would be redundant. On a four wheeled vehicle, a
typical rear wheel drive application would use a driveshaft speed sensor for the rear wheels compared to a sensor
on the right front wheel (since this one is less likely to lift off the ground with normal engine rotation). And a typical
front wheel drive drag racing application would use whichever front tire is more prone to spin, compared with either
rear tire. However, the MS3Pro offers other options, using three or four sensors.
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 237
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