7.1 Basic / Load Sections 7 ADDITIONAL ITEMS: BEYOND BASIC FUEL AND IGNITION CONTROL
• Upper limit - the maximum barometric pressure allowed.
• Lower limit - the minimum barometric pressure allowed.
• Default baro - the typical baro pressure for your region. This is used as a the barometer value if you have
not enabled a sensor.
• Old Baro Calc - Barometric correction has been improved for 1.4.0 and later firmware. If loading a tune from
1.3.4 firmware or older, turn this on to maintain backward comparability.
7.1.1.2 MAP sensor settings
• MAP sensor type - "Voltage" (by far the most common) or "Frequency" (used on a few Ford or Cosworth
engines) are supported. The most common frequency based MAP sensor most enthusiasts may encounter
is the one used on Fox body Mustangs.
• Voltage input port - where the primary MAP sensor is wired (when voltage is selected.)
• Frequency input port - where the primary MAP sensor is wired (when frequency is selected.)
• Low frequency - the frequency corresponding to the minimum pressure, if using a frequency based MAP
sensor.
• High frequency - the frequency corresponding to the maximum pressure, if using a frequency based MAP
sensor.
• 2nd MAP port - enables a secondary voltage MAP sensor and selects where it is wired. If using two MAP
sensors, the MS3Pro compares both MAP sensors and uses the lower one as the reading for the engine.
7.1.1.3 General Sensor Settings The MegaView was an add on display device from the DIY line of MegaSquirt
products, although the availability of inexpensive Android tablets has eliminated most demand for it. MegaView
displays built for the MegaSquirt-II will also work with MS3Pro.
• MegaView temp units - Choose degC or degF to match your MegaView.
Lag factors force the variables to change more slowly than the actual input value, smoothing them and reducing
the effect of noise in the signals. Note that in all cases, 100% is no lag effect at all, and smaller numbers slow the
input response speed. Setting a lag factor to zero will completely paralyze the input and prevent it from changing
at all, normally not a desirable setting. Higher numbers can give faster throttle response in many cases, but setting
them too high can cause problems if you have noise on the input.
The following inputs can have lag factors applied to them:
• MAP Averaging Lag Factor (also applies to MAF)
• RPM Averaging Lag Factor
• TPS Averaging Lag Factor
• Lambda Averaging Lag Factor
• CLT/MAT/Batt Averaging Lag Factor (these sensors run off a common number)
Auto-zero TPS - if TPS% is showing negative at power on, the current value will be taken as zero.
7.1.1.4 Load Parameters These critical settings determine the engine behavior and select your chosen load
source. See section 5.2 for an explanation of the load types.
• Primary Fuel load - sets the primary fueling algorithm.
• Secondary Fuel load - enables an optional secondary blended fuel table. Most engines will not need a
secondary fuel load.
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 125
To Next Page
Loading...