MSD Boost Timing Master with Vacuum Advance
PN 8962
IMPORTANT: Read the instructions before attempting installation.
Parts Included:
1 – Boost Timing Master, PN 8962
4 – Self Tapping Screws
1 – Dashboard Mounted Control Knob
1 – 2-Pin Connector
1 – Parts Bag
WARNING: During installation disconnect the battery cables. When disconnecting the battery,
always remove negative cable first and install it last.
Note: The PN 8962 must be used with an MSD Ignition Control.
Note: The PN 8962 will advance the timing approximately 1.5° for every inch of vacuum the unit sees
(maximum of 15°). The advance will begin at approximately 4 inches of vacuum and will end
at approximately 14 inches of vacuum.
INTRODUCTION
In order to get the most out of your Boost Timing Master, driving tests and fine-tuning are required.
You will want to achieve having the highest advance timing for peak horsepower at low rpm when
boost pressure is low, and retard the timing during boost just enough to prevent knocking or
predetonation.
Note: In setting up the timing curve, a hand held Mighty-Vac or similar tool will allow you to simulate
the boost pressure, while you adjust timing at idle.
PROGRAMMING
Cylinder Select: The Boost Timing Master is
programmed at the factory for 8-cylinder engines. It
can easily be modified for use on 4 and 6-cylinder
engines. The number of cylinders is adjusted by cutting
the cylinder select loops. Figure 1 shows the Cylinder
Programming Loops and how to modify the Unit.
Magnetic Trigger: If you are using a distributor with a
magnetic pickup, such as an MSD, to trigger the ignition
system the White Wire Loop needs to be cut (Figure 1).
If you are using the points or amplifier input of the MSD
Ignition Control, this Loop does not need to be cut.
MOUNTING
The Boost Timing Master can be mounted under the
hood, but should be away from direct engine heat
INSTALLATION INSTRUCTIONS
R
Figure 1 Selecting the Cylinders or Trigger Pickup.
M S D I G N I T I O N
• w w w . m s d i g n i t i o n . c o m • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • FA X ( 9 1 5 ) 8 5 7 - 3 3 4 4
