Msd 7805 8-Plus Ignition Control Installation- User Manual
Msd 7805 8-Plus Ignition Control Installation– User Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 2 – GENERAL INFORMATION; BATTERY; Terminal produces a 12 volt square wave signal with a 20% duty cycle.; SPARK PLUGS AND WIRES; a good path for the spark to follow while keeping Electro Magnetic; MOUNTING; area such as the glovebox.; TACH; Figure 2 Tach Terminal.
- Page 3 – WIRING; GENERAL WIRING INFORMATION; Wire Length: All of the wires of the MSD Ignition may be shortened as; must be soldered and sealed.; connect to the alternator.; GROUND; Figure 3 Ground Stud.
- Page 4 – ROUTING WIRES; TROUBLESHOOTING; MISSES AND INTERMITTENT PROBLEMS; Common Mag Pickup Wires; Distributor; Figure 4 Common Mag Pickup Wires.
- Page 5 – CHECKING FOR SPARK; If triggering the ignition with the White wire:; Figure 6 Checking for Spark with Magnetic Pickup.
- Page 6 – If there is no spark:; source and repeat the test.; If there is no spark, but the LED flashes, check for a coil problem.; COIL TERMINALS; MSD SYSTEMS Installing to an MSD Distributor/Crank Trigger.
- Page 7 – MSD SYSTEMS Single coil with an MSD Timing Control.; MSD SYSTEMS With an MSD Timing Control.
- Page 8 – MSD SYSTEM Installing to a Programmable Digital 7, PN 7531; Limited Warranty; or consequential damages.; Service; When returning MSD components for warranty service,; Proof of Purchase must be supplied for verification. After; All returns must have a Return Material Authorization (RMA) number; issued to them before; M S D
MSD-8 Plus Ignition
PN 7805
Cylinders Loops to Cut
8
None
6
One
4
Two
2
Three
Cut loops
Remove cap
WARNING: Before installing the MSD Distributor, disconnect the battery cables. When disconnecting
the battery cables, always remove the Negative (-) cable first and install it last.
Figure 1 Cylinder Programming.
1 - PN 8830 Filter
1 - Coil Harness
1 - Power Harness
1 - Parts Bag, Mounts, Terminals, etc.
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.
Note:
Solid Core spark plug wires cannot be used with an MSD Ignition.
Parts Included:
1 - MSD-8 Plus Ignition
1 - Mag Pickup Extension Harness, PN 8860
4 - Vibration Mounts and Hardware
4 - RPM Modules: 3K, 7K, 8K and 9K
FEATURES
SINGLE OR DUAL COIL OUTPUT
The MSD-8 Plus Ignition Control is intended for racing use only. The Ignition has the ability to be
used with single or dual coil systems. Note that when using a single coil, both coil positive wires must
be connected to the coil.
RPM LIMITERS
The MSD-8 Plus Ignition is equipped with a 2-Step Rev Control. The Ignition will accept two rpm
modules so two different rev limits can be set. One rev limit can be used for over-rev protection while
the second limit can be activated on the starting line for a lower rpm limit to assist in staging and for
consistent holeshots. When 12 volts are applied
to the 2-Step terminal (2’S’), Module 1 is active.
Module 2 is active when there is no 12 volts.
CYLINDER SELECT
This ignition can be used on 2, 4, 6 (even-fire)
or 8-cylinder engines. The ignition is set for
8-cylinder operation. To program the unit for
other engines, remove the one screw that holds
the cover to reveal three wire loops (Figure
1). Cutting a wire loop determines the cylinder
selection.
SPARK LED
When the coil fires, current is sensed and this LED will flash. These LEDs confirm that the ignition
has received a trigger signal and that the ignition is working properly. Each time a coil fires, current
is sensed and the corresponding LED will flash. (If the coil is not connected, the LED will not flash.)
When the engine is running, it will appear solid.
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
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Summary
2 I N S T A L L A T I O N I N S T R U C T I O N S 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 GENERAL INFORMATION BATTERY An MSD-8 Plus Ignition Control will operate on any negative ground, 12 volt electrical sys...
I N S T A L L A T I O N I N S T R U C T I O N S 3 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 WIRING GENERAL WIRING INFORMATION Wire Length: All of the wires of the MSD Ignition may be shortened as long as qualit...
4 I N S T A L L A T I O N I N S T R U C T I O N S 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 ROUTING WIRES The MSD wires should be routed away from direct heat sources such as exhaust manifolds and headers and a...
