Msd 83647 HEAT HEI Module Installation User Manual download pdf

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

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.

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

1 2 3 4

Summary of Contents

Page 1 - MSD HEAT Digital HEI Module

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

Page 2 - TACHOMETER INFORMATION

2 INSTALLATION INSTRUCTIONSM 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

Page 3 - ENABLE REV LIMIT VERIFICATION

INSTALLATION INSTRUCTIONS 3M 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

Page 4 - TECH NOTES

Limited Warranty MSD warrants this product to be free from defects in material and workmanship under its intended normal use*, when properly installe

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Msd 83647 HEAT HEI Module Installation User Manual

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