Msd 8394 Digital E-Curve Distributor Installation- User Manual
Msd 8394 Digital E-Curve Distributor 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 – CHOOSING AN ADVANCE CURVE; Figure 2 Ignition Timing Factors.
- Page 3 – • Start the electrical advance just above the idle rpm.; SETTING UP THE DISTRIBUTOR; to the number 1 spark plug wire and start the engine.
- Page 4 – Figure 3 Available Timing Curves.
- Page 5 – only; Figure 5 Marking the Rotor Location.; INSTALLING THE DISTRIBUTOR; Figure 6 Modified Block for use with O-Rings.
- Page 6 – Figure 7 Wiring the Ready-to-Run Chevrolet Distributor.
- Page 7 – STARTING AND TUNING TIPS; Figure 9 The Timing Tape Installed.
- Page 8 – Figure 10 Optional Installation by Bolting the Cap Down.; Limited Warranty; or consequential damages.; Service; When returning MSD components for warranty service,; Proof of Purchase; must be supplied for verification. After; M S D
MSD Pro-Billet Digital E-Curve Distributor
PN 8394 - U.S. Patent 6820602
Important:
Read these instructions before attempting the installation.
P a r t s I n c l u d e d :
1 - Digital E-Curve Distributor
1 - Rotor, PN 8467
1 - Distributor Cap, PN 8433
1 - Wire Retainer
2 - 1.5" Self Tapping Screws
Note:
The terminals of this Digital E-Curve Distributor require spark plug style terminals. You may
need to change the terminals and boots of your wires. MSD offers two kits, PN 8849 or PN 8848
that are supplied with nine boots and terminals.
Note:
If the gear is ever replaced, MSD Gear (PN 8531)
is required for replacement due to the .500"
diameter shaft.
DIGITAL E-CURVE FUNCTIONS
RPM LIMIT
This distributor is equipped with an adjustable rev limiter. It
is adjustable from 5,000 - 10,000 rpm by a rotary dial under
the cap and rotor (Figure 1). The rpm will not exceed your
selected amount to protect the engine from overrev damage.
TIMING FUNCTIONS
Electronic Advance Curve Operation:
The Electronic Advance Curve is managed by a microprocessor
built into the ignition module. You can program an electronic timing advance curve by adjusting two
rotary switches under the distributor cap (Figure 1). A magnetic pickup is used as a trigger device
that tells the ignition module when to fire the coil. The pickup is triggered by a reluctor mounted to
the distributor shaft. This means that you have to set the distributor at the highest, or Total, amount
of advance that you want to achieve (including vacuum advance) and compensate with one of the
selectable ignition curves (shown on page 4). Following are important definitions that will be used to
set up your timing.
1 - 3-Pin Harness
1 - Gasket
1 - Tube of Gear Lubricant
2 - O-Rings
1 - Timing Tape Set, PN 8985
WARNING:
Before installing the MSD Digital E-Curve Distributor, disconnect the battery cables.
When disconnecting the battery cables, always remove the Negative (-) cable first
and install it last.
Figure 1 Rotary Dial Adjustments.
Timing
Switch 1
Timing Switch 2
Rev
Limiter
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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 INSTALLATION INSTRUCTIONS 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 Electronic Centrifugal Advance: Since this distributor is all electronic, there really is no mechanical or centrifugal advance....
INSTALLATION INSTRUCTIONS 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 As you can see from the chart, most factors will change throughout the range of the engine operation. The Digital E-Curve allows you to mak...
4 INSTALLATION INSTRUCTIONS 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 Figure 3 Available Timing Curves. Figure 4 Advance Curve Switch Position.
