INSTALLING THE RPM SPARK PICKUP
(MAGNETO IGNITION SYSTEMS)
Note: Due to the various styles and amperage of magnetos in use today
there is no single instruction that covers all types.
Please locate the schematic for your type of magneto and follow
that diagram closely.
The
Primary
wire (usually orange or red in color), that connects the magneto to the coil or control
box, must be routed through the Primary Spark Pickup. The wire must pass through the opening in
the pickup (see drawing below). The number of times the wire must pass through the hole will de-
pend on the type of magneto you are using:
Up To 5 Amp magneto
4 passes through hole (3 loops)
MSD 12 Amp magneto
3 passes through hole (2 loops)
MSD 20 Amp magneto
3 passes through hole (2 loops)
MSD 44 Amp magneto
1 pass through hole
(no loops)
These are starting points and will work for most applications. If the engine rpm graph has
spikes that drop below the real rpm then you will need to add a loop. If the engine rpm
graph has spikes that go above the real rpm then you will need to remove a loop.
30402 Esperanza
Rancho Santa Margarita, CA. 92688 USA
Telephone 949-709-5555 Fax 949-709-5556
www.racepak.com
COIL
TYPICAL MALLORY MAGNETO INSTALLATION
MAG
Run the orange wire through the hole in
pickup four times making three loops.
PRIMARY
SPARK
PICKUP
Connect to black cable of
data logger wiring harness