Owners manual

INSTALLATION INSTRUCTIONS 3
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MAP TIMING
The Map Timing tab allows for timing
changes based off of boost pressure. The
horizontallineinFigure3atthezeropoint
for manifold pressure is the zero point for
timing. Points added above this line will
add timing, while points added below
this line will retard timing. The vertical line
in Figure 3 at the zero point for ignition
timing is the zero point in terms of relative
pressure. Any points added to the left of
this line will manipulate timing in terms of
engine vacuum, while points added to the
right of this line will manipulate timing in
terms of boost pressure.
The MAP timing curve allows for up to
30 different dots added to the curve.
Pressure adjustments can be made in
0.1psiincrementsfrom-14.5psito43.5psi.
Timing adjustments can be made in .1°
incrementswithamaximumof20°timing
advance/timingretard.Figure3
Note: The timing changes in the Boost Retard Module total up with the timing changes in the Power
Grid.Forexample,iftwostepretardsareprogrammedtoretard20°,andtheboostretardis
programmedtopull5°,thesumofthePowerGridretardwillbe25°intheeventthatallthree
retardsareactiveatthesametime.ThePowerGridwillnotretardmorethen30°total,evenif
thesumofalltheretardsexceed30°.
OVER BOOST SHUTDOWN
When the MAP pressure reading increases above the Pressure value programmed in the unit it will shut
off the ignition system. Generally this setting is set above the maximum amount of boost desired during
therun.ThedefaultOverBoostShutdownsettingis4.4psi.TheOver-BoostShutdownsettingcanbe
raisedto43.5psiin.1psiincrements.
Note: If this setting is lower than the maximum amount of boost, it will cause the ignition to shut off
unexpectedly.
Over Boost Hysteresis: The Over Boost Hysteresis is the amount of boost pressure drop before
theignitionwillrestart.IftheOverBoostShutdownissetat25psiandissetoffwhiletheOverBoost
Hysteresisissetat5psi,theboostpressuremustdropbelow20psi(25-5)beforetheignitionwillre-
re.ThedefaultOverBoostHysteresisissetat0.0psiandcanberaisedto43.5psiin.1psiincrements.
Pressure Switch On Above: The Pressure Switch On Above setting closes the Orange wire to ground
once boost pressure increases above the programmed setting. This wire is capable of sinking 2A of
current. MSD recommends use of a relay with this function. The Pressure Switch On Above default setting
is4.4psiandcanberaisedto43.5psiin.1psiincrements.
Pressure Switch Hysteresis: The Pressure Switch
Hysteresis setting opens the Orange wire from ground once
boost pressure drops below the Pressure Switch On minus
the Hysteresis setting. If the Pressure Switch On Above is
set at 25psi and the Pressure Switch Hysteresis is set at
5psi,theboostpressuremustdropbelow20psibeforethe
orange wire will open from ground. The default setting for
thePressureSwitchHysteresisis1.5psi.
Figure 3 Mapping the Timing in the View Software
Figure 4