AMP EFI MS3Pro - Tuning; Using VE1 as a Trim Table; MAF Correction Table (Old)

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7.1 Basic / Load Sections 7 ADDITIONAL ITEMS: BEYOND BASIC FUEL AND IGNITION CONTROL

MAF Load. This behaves similarly to MAP in a speed density system and should give a repeatable load value and

allow tuning of those tables in the conventional manner. Make sure the axes on the table are set to cover all MAF

load values and RPMs if the engine is turbocharged; as a rule of thumb, the highest MAF load will probably be

higher than the highest K Pa value the engine sees. When live tuning, the active cell will be highlighted.

A MAF only install will need to use MAF Load for spark and AFR table lookups. But, if you have a MAP sensor

installed you can choose to set "Speed Density" for spark and/or AFR which will then use MAP as the Y-axis in the

table. It is also possible to use alpha-N and tune the spark map based on TPS.

7.1.13.2 Tuning Initially it is suggested to leave the trim table turned off. Ensure you have conﬁgured the basic

engine parameters: number of cylinders, number of injectors, engine size, injector ﬂow and used the ReqFuel

calculator to set ReqFuel. As noted above, set primary fuel load to MAF and spark and AFR to use MAF. Conﬁgure

the AFR table for your chosen target AFR values. Ensure that the load and rpm axes cover your expected range;

alter them to suit if needed. It is suggested that EGO correction be set to "No correction" at this time. Having

started your engine, your primary tuning tool at this point is to make tweaks to the MAF Flow curve so that the

reported AFR from your wideband matches the target table you conﬁgured. (You can enable the AFR error gauge

in TunerStudio to see the difference between the two.)

Ignition tuning will be about the same, but do not try dialing in the ﬁnal ignition table until you have the ﬁnal

MAF calibration curve.

7.1.13.3 Using VE1 as a trim table If and only if you have exhausted tuning using the Flow curve alone, you

can enable VE1 as a trim table. This gives you a full trim table of MAF Load vs RPM. (VE3 is also available with

table switching.) When ﬁrst enabling VE1 as a trim table you will need to ﬁll it with 100%. Press CTRL-A, = and

then enter 100. The table should now look as follows:

Adjust the table as needed to hit your AFR targets.

7.1.14 MAF correction table (old)

When using the older MAF implementation, you will enter the MAF calibration curve under Tools -> Calibrate MAF

Table. This curve is a percentage trim to correct the curve loaded from the Tools menu.

AMP EFI MS3Pro manual version 1.202, ﬁrmware 1.5.0, 4/21/2017 Page 148