7.8 Advanced Engine 7 ADDITIONAL ITEMS: BEYOND BASIC FUEL AND IGNITION CONTROL
• The MS3Pro can use two wheels on one axle for either driven or non driven wheel speed. The MS3Pro
allows you to either average the two sensor readings or to compare both sides and select the higher value.
The maximum function can be particularly useful on applications where one wheel is likely to leave the
ground, such as many front wheel drive VW vehicles in road race or autocross applications. Note that a
driveshaft speed sensor will also create an average value between both wheels on the driven axle, but do so
mechanically.
• The MS3Pro can use the average or highest value across all four wheels. This can be used for perfect run
VSS mode on all wheel drive vehicles, or compared to a high speed GPS speedometer input for % slip based
control.
• Side2Side mode requires both the driven and undriven wheels to use this setting. It compares the wheel-
speed between driven and non driven wheels on each side, using the highest value as the percent slip.
When configuring speed sensors for side2side mode, VSS1 and VSS3 need to be on the driven wheels.
VSS2 needs to be on the non-driven wheel on the same side as VSS1, and VSS4 needs to be on the non-
driven wheel on the same side as VSS3. This mode is intended for autocross use and racetracks with sharp
corners, where the difference between wheel speed on each side can be considerable.
7.8.7 Traction control - perfect run VSS
This screen lets you specify the maximum speed for the traction control to allow as a function of the time after
launch control deactivates. After passing the top time point, the traction control turns off.
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 238
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