Precision Turbo and Engine BigStuff3 GEN3 Powertrain Controller Ignition Setup Tutorial - Manual (Page 6)

value in the Crank Trigger window (in the Operating Configuration table), up or down, until
the “Dash” value and the crank value are the same. See
Setting_The_Crank_Reference on page
25.
• Dynamically check the rotor phase. See
Dynamically_Checking_Rotor_Phasing on page 30.
• Lastly, you will want to verify cam synchronization. See
Verifying_Synchronization on page
11.
Modifying an Existing Distributor to Create a CAM Sync Signal
If you already have an IPU distributor, the possibility exists to modify it so that it can be used to
provide the cam sync signal. If the distributor has reluctor tabs (interrupts for each cylinder), 7 of the 8
reluctor tabs (for a V8) can be removed to create a cam sync distributor. Please carefully read this
section before removing the reluctor tabs from the distributor.
Note: If you decide to modify a distributor to provide the cam sync signal, the mechanical advance
must also to be locked out! See
Locking_Out_the_Cent_Advance or go to page 3, then the section
outlining this procedure.
Reluctor tab
Setting Up the IPU Distributor to be used as the Cam Sync
Once the distributor has been “locked out” (the mechanical advance capabilities have been removed), it
needs to be installed in the engine to determine which reluctors (7 of 8 for a V8) need to be removed to
create the cam sync signal. The cam sync (signal) must occur before the Crank signal.
Start by rotating the crank to 10
o
– 20
o
before the “Crank Reference” angle described above (this could
be up to 70
o
BTDC with a 50
o
“Crank Reference”). Install the distributor making sure that it is
installed in the engine in an orientation that allows the plug wires to be easily routed to their respective
cylinders and that the leads (wires from the pickup) can be easily connected to the main wire harness.
Note: For engines with the distributor mounted in the front, an extension jumper will be needed to
interface with the “Cam” connector on the BigStuff3 harness. Remove the distributor cap and rotor
and align the pickup pole piece with reluctor. The distributor may need to be loosened so that the base
of the distributor can be moved slightly to ensure an exact alignment between the senor pole piece and
reluctor. The reluctor and pole piece are said to be “in-phase” when they are perfectly aligned.
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