Precision Turbo and Engine BigStuff3 GEN3 Powertrain Controller Ignition Setup Tutorial - Manual (Page 10)

Repositioning the Magnet
You may have to reposition the magnet in the magnet carrier, if the rotor phase is unacceptable for the
desired timing at peak power. Next, rotate the engine back to the 10 - 20
o
before the “Crank
Reference” (55 – 65
o
BTDC). Once there, remove the magnet carrier and note the position of the
Inductive Pick-Up (IPU) sensor and mark the magnet carrier where the IPU aligns. Remove the
magnet carrier by loosening the center flush mount cap screw. Next drill and re-epoxy the magnet into
the carrier at the new/marked location.
Important: Make sure the magnet is reinstalled in the correct direction! Note: the Inductive Pick-Up
(IPU) sensor may have to be moved instead of the magnet, if there is not enough material to
encapsulate the magnet in the new position.
Note: The cam sync signal must never occur at the same time as the crank trigger signal. If this
occurs, the ECU will set the Cam_Sync error flag. You can record this in the Replay datalog. Once the
Cam_Sync error is set, the individual cylinder timing corrections could jump to the wrong cylinder
causing engine misfire.
The MSD IPU Cam Sync Distributor 2 wire distributor connector must be changed to the 2 way gray
male Metripack connector (included in IPU kits). Crimp the seals and female terminals on with the
correct crimping tool. Use Packard crimper, PN 12014254 or MSD’s Pro-Crimp Tool, PN 35051, with
Weathertight Dies, PN 3509. Install the MSD IPU Cam Sync Distributor
green wire into cavity “A” of
the gray Metripack connector and plug it into the 2 wire gray connector labeled “Cam” on the
BigStuff3 harness. The BigStuff3
red wire must connect to the MSD green wire.
HED Cam Sync Transducer
BigStuff can also supply a Hall Effect transducer (HED) and magnet for
DIY cam sync pulses (PN JMI-007-013). See picture below. The HED
output is ideal for near zero speed sensing applications. It can be used
to provide the cam sync pulse to adapt Coil on Plug ignition systems to
virtually any application. It may also be used in place of the 2 wire
pickup on MSD All-In-One Distributors (PN 2345 & 2382).
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