MSD 7530T Installation

Programmable Digital-7

PN 7530T

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Parts Included:

1 - Ignition Control, PN 7530T 1 - MSD Pro-Data+ CD 4 - Vibration Mounts & Screws 1 - Shielded Cam Sync Harness

Accessories (Not Supplied):

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

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

the Negative cable ﬁrst and install it last.

1 - 9-Pin Computer Harness 1 - Shielded Mag Pickup Harness, PN 8862 1 - 12-Pin Harness 1 - Coil Harness 1 - Power Lead Harness

LED Shift Light, PN 7552 Manual Launch Control w/Shift Light, PN 8736 Single Pole/Single Throw Relay, PN 8961 Double Pole/Double Throw Relay, PN 8960

OPERATION

DIGITAL OPERATION

The MSD Programmable Digital-7 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 better than 0.1° total accuracy and +/- 2 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.

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2 INSTALLATION INSTRUCTIONS

PROTECTION

The MSD Digital-7 Programmable 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. The LED will verify trigger inputs and will ﬂash trouble codes such as a Code 2 for No Cam Sync, Code 3 for Low Battery supply voltage or Code 4 for Traction Control Detection.

CAMSHAFT SYNCHRONIZATION

This is used only in applications where the individual cylinder timing is going to be used. The 2-pin connector with a Light Blue and Light Green wire connects to a sensor that is used to synchronize or alert the Ignition as to when the number one cylinder is going to be triggered. With this information, the Ignition knows which cylinder is being ﬁred allowing for the individual cylinder timing capabilities. A Universal Cam Sensor is available from MSD as PN 2346. MSD offers two kits to use for sync signals: Universal Cam Sensor, PN 2346 and Fiber Optic Inductive Pickup Kit, PN 7555.

WIRING

Heavy

Ignition supply wire. Connects to battery positive (+) terminal or battery junction.

Red

Note: Do not connect to the alternator.

Heavy

Ignition supply Ground wire. Connect to battery negative (-) terminal or engine block.

Black

Red On/Off switch wiring. Connects to a switched 12 volt source.

Primary Coil Leads

Orange Connects to the coil positive (+) terminal. This is the only wire that makes contact to

the coil positive terminal.

Black Connects to the coil negative (-) terminal. This is the only wire that makes contact to the coil negative terminal.

WARNING: High voltage is present at the coil primary terminals. Do not touch the coil or connect

test equipment to the terminals while the engine is running or cranking.

Trigger Wires

Violet/ Magnetic pickup, 2-pin connector. Plugs into an MSD Distributor or Crank Trigger pickup. Violet is positive, Green is negative. Note: When this connector is used, the

Green

White wire is not connected.

2-Pin

White Trigger input for electronic ignition ampliﬁers, an ECU’s trigger or points. Note: When this wire is used, the magnetic pickup wire is not connected.

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INSTALLATION INSTRUCTIONS 3

Accessories

Dark Blue 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.

Note: When this wire is activated it will override all other Rev Limits except the TCD Limit.

Light Blue Burnout Rev Limit. When 12 volts are applied the Burnout Rev Limit is active.

Gray Tach output. This wire will provide the same 12 volt square wave tach signal as the tach

terminal on the side of the unit.

Retard Stage Wires or Gear Select

These three wires can be used as Retard Stage Activation and/or as a gear select wire.

Pink Step1 retard enabled with +12 volt input and above Step1 Rpm value and Gear 2 Select.

Violet Step2 retard enabled with +12 volt input and above Step2 Rpm value and Gear 3 Select.

Tan Step3 retard enabled with +12 volt input and above Step3 Rpm value and Gear 4 Select.

Note: When activated at the same time, these retard stages are added together. They are also

added with any Gear Retard Curve or Boost Retard values as well. Maximum retard is 30°.

Yellow Shift Light output wire. It can handle up to 3 amps continuous to ground when enabled.

Brown/White RPM/Time switch output wire. It can switch up to 3 amps continuous to ground when enabled.

Yellow/Yellow

Output for data acquisition or fuel controls. Note, only two wires are used.

Cam Synchronization

Fiber Optic This input requires the PN 7555 Inductive Sync Pickup. When this input is used, the 2-pin

connector is not. Note: If this input is not used, the plug or a cover should be installed.

2-Pin Connector

Light Blue/ This 2-pin plug connects to Cam Sync Sensor, PN 2346, to indicate when cylinder number

Light Green

one is ﬁring. Note: When used, the ﬁber optic connector is not used and must be covered. Light Blue is cam (+) and Light Green (-).

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4 INSTALLATION INSTRUCTIONS

Figure 1 Wiring the Programmable Digital-7 Ignition.

PRO-DATA+

INSTALLATION OF THE PRO-DATA+ SOFTWARE

1. Insert the installation CD into your CD drive.

2. In Windows, click on Start then select Run.

3. In the box type, “A:Setup” and press Enter (or whatever disk drive you are using).

4. The screen will walk you through several steps.

5. Once loaded, your monitor will have an MSD Graph View logo. Click on it to open the software.

6. A program will open. Go to the upper left corner of the screen and click on File, then Open.

7. This will open a menu of part numbers. Select “7530T”.

8. This will open another menu of versions. Highlight and open the “7530Tvxx.IGN” (xx determines the versions, such as 22). This will open the Pro-Data+ software for the Programmable Digital-7 Ignition.

SAVES AND TRANSFERS

Whenever a change is made to a program, it either must be saved to a ﬁle in your PC or it needs to be transferred to the ignition. You will notice that whenever you make a change to a program, the bullet next to the modiﬁed value will turn red. It will remain red until you save it to a ﬁle or to the MSD. There are two ways to save your ﬁles.

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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.

You can create numerous ﬁles on your PC and download them for testing purposes or by saving programs you used at different races or events.

MONITOR

PROGRAM

STATUS

SOFTWARE

VERSION

GEAR RETARD CURVES

TACH

TREE

TIMING

USER

ICM

NOTES

Figure 2 Pro-Data+ Screen and Program Windows.

PROGRAMMABLE FEATURES

The following explains the programmable features of the PN 7530T Ignition. The features are listed in the same order that they show on the Data Editor list in the software. Note that all of the retard amounts are cumulative and the maximum amount of retard is 30°.

STATS

Stat 1: This is only used with the Hand Held Monitors, PN 7550, PN 7553.

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