Msd 83647 HEAT HEI Module Installation- User Manual
Msd 83647 HEAT HEI Module 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 – Figure 2 Connecting the Module and Tach Lead.; TACHOMETER INFORMATION; No Rev Limit: To disable the rev limit function, cut and remove the; Figure 3 Disable the Rev Limit.
- Page 3 – PROGRAMMING THE REV LIMIT; Figure 4
- Page 4 – 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; TECH NOTES
Figure 1 Installing the Module.
This Module is a performance replacement for GM’s 4-Pin HEI Module. It features a programmable
rev limiter for overrev protection. The Module will mount in a stock HEI housing (by removing the
original condenser assembly) or in MSD’s Pro-Billet HEI Distributor, PN 8365. A GM Coil can be used
or for maximum performance, use MSD’s HEI Coil, PN 8225.
Parts Included:
1 - HEI Module, PN 83647
1 - Tube of Heat Sink Compound
1 - Gray Tach Wire
2 - Mounting Screws and Star Washers
1 - Low Resistance Rotor Bushing, PN 8412
INSTALLATION
1. Mark the location of the spark plug wires on the cap prior to removal.
2. Remove the cap, rotor, module and condenser (if equipped) from the original distributor.
3. Apply a liberal coat of the Heat Sink Compound to the aluminum base of the Module.
4. Route the wiring harness out of the housing and position the short Black wire to ground with one
of the mounting screws (Figure 1).
5. Position the module in the distributor then locate the two screws and star washers to secure the
module (Figure 1).
6. Reinstall the rotor
and cap.
Note: A tachometer is required to program the rev limit.
CONNECT SHORT
BLACK WIRE
TO GROUND
APPLY
HEAT SINK
COMPOUND
DISTRIBUTOR
HOUSING
DIGITAL
HEI MODULE
CAP
CONNECTOR
SCREWS AND
STAR WASHERS
TO TACH
USE TO
PROGRAM TACH
GRAY
TACH
OUTPUT
REV LIMIT
BYPASS
JUMPER
MSD HEAT Digital HEI Module
PN 83647
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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 7. Connect the HEI Module harness to the Distributor Cap followed by the 12 volt (BAT) wire. This wire should be at least 14-gauge (Figure 2...
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 PROGRAMMING THE REV LIMIT A tachometer is required to set the rev limit. The limit is programmed by running the engine at half the desired r...
Limited Warranty M SD warrants this product to be free from defects in material and workmanship under its intended normal use*, when properly installed and purchased from an authorized MSD dealer, for a period of one year from the date of the original purchase. This warranty is void for any products...
