7.7 Table Choices 7 ADDITIONAL ITEMS: BEYOND BASIC FUEL AND IGNITION CONTROL
Single algorithm, single table
By far the most common install is to use a single Speed-Density fuel table. This really should be your
starting point before considering other load methods and certainly before multiple-table configurations are enabled.
Multiply MAP controls whether MAP is included in the calculation for VE1 (and VE3). For regular Speed-Density
this should almost always be enabled. For "Pure" Alpha-N, leave it disabled. For "Hybrid" Alpha-N, enable it. For
MAF, it is ignored.
Single algorithm with table switching
Here we have table switching enabled in the upper left hand corner of the Table Switch / Dual Fuel menu. A
physical switch input (shown here connected to “Digital Frequency In 1”) is used to swap between VE1 and VE3
for fueling. The same algorithm is used for both tables. The RPM, TPS, kPa switch points can be used as a form
of table extension where say VE1 is 0-3500rpm and VE3 is 3500-7000rpm.
Single algorithm with table blending
Blend curve (3) is used to define the blend between VE1 and VE3 which use the same algorithm. At 0% of
’sensor9’ (could be a trim pot) the fuel is calculated from VE1. At 100% of ’sensor9’ the fuel is calculated from
VE3. In-between, proportions of table will be used. It is very important to tune each table individually - trying to
retune with a partial blend is likely to result in confusion or failure.
AMP EFI MS3Pro manual version 1.202, firmware 1.5.0, 4/21/2017 Page 219
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