MSD 83811 GM LT-1 5.7L Distributor 95-97 Installation - Manual

IMPORTANT: Due to the number of applications and years that the LT-1 Distributor is used on, it is highly recommended
to have the Service Manual for your vehicle during this installation.
IMPORTANT NOTES BEFORE INSTALLATION
Throughout its course, the GM LT-1engine used two different drive mechanisms to connect the cam to the distributor.
Figure 1 shows the
drive for the MSD PN
83811 Distributor.
This design is used
in the later model
distributors.
Before removing the
distributor it is rec-
ommended to mark
the location of the ro-
tor. This is to ensure
that the distributor and cam are indexed correctly prior to reassembly.
Be sure that the O-ring between the distributor cap and the housing is in place before installing the cap. The O-ring
must be stretched out, then installed onto the housing. It will shrink back to size.
TIMING INFORMATION
Since the timing of the MSD Pro-Billet Distributor can be ad-
justed, it is recommended that a timing indicator and mark be
fabricated prior to installing the distributor. This way, the tim-
ing can be recorded so the MSD Distributor can be set to the
same amount. From the factory, the MSD Distributor is set to
the OEM specs (one and a half turns).
The MSD Distributor can alter the timing +/-6°, with a quar-
ter turn equalling 1° of timing. The adjusting screw has a soft
Loctite compound applied to it for a seal (Figure 2). Repeated
adjustments may loosen the screw. If this occurs, remove the
screw and apply Blue Loctite to the threads. The screw can
safely be removed from the distributor.
Too much advance may cause detonation resulting in the
ECU retarding the timing through the engine’s knock sensor.
When adjusting the timing, take note that the ECU varies the
timing at an idle. It is recommended to bring the engine rpm up to 1,500 - 2,000 when setting the timing.
MSD Pro-Billet LT-1 Distributor
'94-'96 B and D-Bodies, '95-'97 F-Body,
'95-'96 Corvette, PN 83811
Parts Included:
1 - Distributor
1 - Cap
1 - Rotor
1 - Isolator
2 - Rotor Screws
1 - O-ring
3 - 1/4-20 x 2" Socket Head Cap Screws
5 - 8-32 x 0.5" Phillips Screws
1 - Removal Tool
Figure 2 Adjusting the Timing.
TIMING
ADJUSTER
MSD PN 83811 CAMSHAFT
INDEX INDEX INDEX
STOCK DISTRIBUTOR
Figure 1 The Drive Mechanism of the PN 83811 Distributor.
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