User Manual

ManualsBrandsMSD ManualsFor the car7531 Programmable Digital-7 Plus Installation

M S D • W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4

Parts Included:

1 - Ignition Control, PN 7531

1 - MSD Pro-Data+ CD Rom

4 - Vibration Mounts & Screws

1 - Shielded Cam Sync Harness

1 - 9-Pin Computer Harness

Accessories

Hand Held Monitor, PN 7550

Inductive Cam Sync Pickup Kit, PN 7555

Non-Magnetic Cam Sync Pickup Kit,

PN 2346

Manual Launch RPM Control, PN 7551

Digital Shift Light, PN 7542

MAP Sensor, see page 9

Replacement Harness, PN 8855

Single Pole/Single Throw Relay, PN 8961

Double Pole/Double Throw Relay, PN 8960

WARNING: During installation, disconnect the battery cables. When disconnecting, always remove

the Negative cable ﬁrst and install it last.

Note: Solid core spark plug wires cannot be used with an MSD Ignition Control.

OPERATION

DIGITAL OPERATION

The MSD Programmable Digital-7 Plus uses a high speed RISC microcontroller to control the ignition’s output

while constantly analyzing the various inputs such as supply voltage, trigger signals and rpm. The high speed

controller can make extremely quick compensations to the output voltage, multiple spark series, timing and rpm

limits while maintaining accurate timing signals to within +/- 0.1° and +/- 10 rpm. The circuits and controller of

the ignition have been thoroughly debounced and suppressed to create protection against Electro Magnetic

Interference (EMI).

CAPACITIVE DISCHARGE

The MSD features a capacitive discharge ignition design. The majority of stock ignition systems are inductive ignitions.

In an inductive ignition, the coil must store energy and step up the supplied voltage to maximum strength between

each ﬁring. At higher rpm, since there is less time to charge the coil to full capacity, the secondary voltage falls short

of reaching its maximum energy level which results in a loss of power or top end miss.

The MSD Ignition features a capacitor which is quickly charged to 520 - 535 volts and stores its energy until the

ignition is triggered. With the CD design, the energy sent to the coil is always at maximum power even at high rpm.

MULTIPLE SPARKS

The MSD produces full power multiple sparks for each ﬁring of a plug. The number of multiple sparks that occur

decreases as rpm increases, however the spark series always lasts for 21° of crankshaft rotation. Above 3,300 rpm

there is simply not enough “time” to ﬁre the spark plug more than once, so there is only one powerful spark.

1 - Mag Pickup Harness, PN 8860

1 - 12-Pin Harness

1 - Coil Harness

1 - Power Lead Harness

Programmable Digital-7 Plus

PN 7531

ONLINE PRODUCT REGISTRATION: Register your MSD product online and you’ll be entered

in our monthly 8.5mm Super Conductor Spark Plug Wire give-away! Registering your product

will help if there is ever a warranty issue with your product and helps the MSD R&D team create

new products that you ask for! Go to www.msdperformance.com/registration.

Summary of content (20 pages)

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Programmable Digital-7 Plus PN 7531 ONLINE PRODUCT REGISTRATION: Register your MSD product online and you’ll be entered in our monthly 8.5mm Super Conductor Spark Plug Wire give-away! Registering your product will help if there is ever a warranty issue with your product and helps the MSD R&D team create new products that you ask for! Go to www.msdperformance.com/registration.
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INSTALLATION INSTRUCTIONS PROTECTION The MSD Programmable Digital-7 Plus has a built in reverse polarity protection circuit. This will protect the ignition in the event of wrong connections. It will also shut off for protection from a surge in power. The ignition will still operate once the surge or polarity is corrected. LED INDICATOR There is an LED that monitors the status of the Ignition.
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INSTALLATION INSTRUCTIONS 3 Accessories Dark Blue Light Blue Spool-Up Limit This wire activates the Launch Rev Limit and is the main reset wire for several features of the Ignition. When 12 volts are applied to this wire it will activate the Launch Rev Limit. It also resets the shift light and gear indicator to first gear. It also will select the Launch Retard value and Gear 1 curve. When 12 volts is removed, the Launch Ramp begins as does the Gear 1 curve.
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INSTALLATION INSTRUCTIONS Figure 1 Wiring the Programmable Digital-7 Plus Ignition. PRO-DATA+ INSTALLATION OF THE PRO-DATA+ SOFTWARE 1. Insert the installation CD Rom into the CD drive, wait up to 30 seconds, the CD will auto run, IF THIS DOES NOT OCCUR: Locate and open the CD Drive. Double click on the autorun.exe file. 2. Select “Click here to Install Version X.XX”. 3. Once loaded, your monitor will have an MSD Pro-Data Plus X.XX logo. Accept the agreement.
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INSTALLATION INSTRUCTIONS 5 Save to MSD: This step will save any changes directly into the ignition. If you are only making one or just a couple modifications this works well. Save to PC: This will save your changes to only show on the PC screen (indicated by a red bullet point next to any altered values). These modifications will not be active or saved until you save the file or transfer the information to the MSD.
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INSTALLATION INSTRUCTIONS REV LIMITS Up to four different rev limits can be programmed in 100 rpm increments. RevBurn: Burnout Rev Limit. This limit is activated when 12 volts are applied to the Light Blue wire. It is adjustable from 2,000 to 12,500 rpm. Note that the Slew Rev Limiter is disabled by the Burnout Limit. RevLaunch: Launch Rev Limit. This limit is activated when 12 volts are applied to the Dark Blue wire. It is adjustable from 2,000 to 12,500 rpm. RevMax: Max Speed Rev Limit.
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INSTALLATION INSTRUCTIONS 7 capabilities. At lower rpm, there are less revolutions per second so the Margin should be set lower. At high rpm there are more combustion events taking place as well as more mechanical variables (such as crank flex) so the high Margin should be set higher. Low: Default is 200 rpm. High: Default is 400 rpm. LAUNCH SLEW This controls the status of the Slew Rev Limiting feature. SlewOff: Activates the Slew Rev Limiting feature. Default is Off.
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INSTALLATION INSTRUCTIONS added together. The maximum retard allowed by the Ignition is a total of 30° (including other retard amounts from a launch, boost or gear retard). Activation through RPM: Each step retard can also be activated through rpm. In order to achieve this, 12 volts must still be applied to the corresponding step retard, and an rpm value must be selected from the Step RPM menu. When 12 volts are applied, the retard will not activate until the rpm value is reached.
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INSTALLATION INSTRUCTIONS 9 GEAR SELECT The Three Step Retard wires, Pink (1), Violet (2) and Tan (3) can also be wired to indicate the first three gear changes to the ignition control. When selected from the Step Wire menu, the ignition will know that the car is in second gear when 12 volts are applied to the Pink wire, third for the Violet and fourth when the Tan wire is applied to 12 volts.
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INSTALLATION INSTRUCTIONS ADVANCE This is a Gear Shift Advance feature that is designed to advance the timing (or remove any retards) during a shift to keep the combustion chamber temperatures consistent. Note: To advance the timing, the crank trigger must be advanced. Therefore, all other timing func tions must compensate for this advance. Gear: Select the number of gears. DRpm: Program the rpm drop that indicates a gear change from 200-1,500 rpm.
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INSTALLATION INSTRUCTIONS 11 RPM/TIME/PRESSURE ACTIVATION SWITCH This program lets you activate a circuit by supplying a ground path on the Brown/White wire (up to 3 Amps continuous). This can be activated in one of several ways: RPM, Time or Pressure. RPM Window: Program an rpm value to activate and deactivate a circuit from 800 – 12,500 rpm in 100 rpm increments.
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INSTALLATION INSTRUCTIONS ALERTS This is used with the Hand Held Monitor, PN 7550 and a pop up alert window appears on the PC screen. You can program an alert to interrupt the screen on the monitor. You can select which alerts to show and how often. The alerts are No Cam Sync and Low Battery. Fault: Program the number of counts that occur for a Low Voltage reset or WatchDog reset. BrownOut 0: This is the count of low voltage resets. This should always be set at 0.
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INSTALLATION INSTRUCTIONS M S D • WWW.MSDPERFORMANCE.
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INSTALLATION INSTRUCTIONS DEFAULT V8 MENU Notes: 7531V08. Uses menu 7531MO8 MSD Digital Race Ignition. Factory default data and menu. 7531 MO8 Monitor Stats Stat 1 RevLim RevBurn *Rpm 7000 RevMax RevMax *OutCAM *Rpm 9500 *AdjOFF RevLaun RevLaunch *Rpm 6200 RevLim Pt 1 Time .
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INSTALLATION INSTRUCTIONS 15 CONNECTING THE REV LIMITS When you connect the Burnout, Launch and Spool Rev Limits, it is important to pay close attention to the acquisition recording of the ignition. The Light Blue wire is responsible for resetting the Run History, as well as activating the Burnout Rev Limt. The Dark Blue is responsible for beginning to record the information and for turning on the Launch Rev Limit.
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INSTALLATION INSTRUCTIONS ACQUISITION The Programmable Plus Ignition Control can provide you with 18 seconds of ignition data during each pass with 2 seconds leading to the launch. Samples are taken by the microprocessor every 10-milliseconds. (The data can be averaged in the Analysis Box by choosing Average.
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INSTALLATION INSTRUCTIONS 17 There will be two windows available in the Launch History screen; a History Analyze window and the other is called History Traces. (If they are not there when you open the History chart, go to View and select Trace box and Analysis box.) There is a third window available called Notes that allow you to write any important notes to that specific run. The MSD records all of the possible information then you decide which ones you want to view and compare.
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INSTALLATION INSTRUCTIONS RpmSw: When the Value function is selected, this will show the RPM Activated Switch as being On or Off. Step1: When the Value function is chosen, this will show On or Off to distinguish when the step retard is active. Step2 Same as Step1. Step3: Same as Step1. RevLaunch: This shows when the launch rev limit was activated by showing On or Off. RevBurn: This tells when the burnout rev limit was activated by showing On or Off.
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INSTALLATION INSTRUCTIONS 19 Average Column: This column puts a filter of sorts on the data. The setting is defaulted to one, meaning that you are viewing the raw data the same as in the History Trace Window. Increasing this number averages the samples together for a cleaner, easier to read trace. This is done by averaging the trace data which is 720° (crankshaft) average data. The Slope function requires an average setting of 5 or more while the RpmDiff trace is best if viewed with an average of 5-10.
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