Precision Turbo and Engine BigStuff3 GEN3 Powertrain Controller Ignition Setup Tutorial - Manual (Page 7)

6
Removing Reluctors
Use a permanent black marker and clearly identify (mark) the reluctor that is lined up or in-phase with
the sensor pole piece. Remove the distributor and remove the reluctors that were not marked, making
sure that the reluctor that was identified/marked is not removed!
The residual metal, that was once a reluctor tab, needs to be completely removed from the reluctor ring
to avoid false triggering. If the magnetic pickup unintentionally senses any of the residual reluctor
material, a false signal could result with undesired consequences!
Reinstall the modified distributor back into the engine. Make sure the distributor is seated fully.
“Bump”, the engine if need be to engage the oil pump drive. Once fully seated, rotate the engine back
to the 10-20 degrees before the “Crank Reference” value (this could be up to 70
o
BTDC with a 50
o
“Crank Reference”). Align the single reluctor tab with the center of the pole piece; now tighten down
the base of the distributor. Next you’ll need to check/verify your rotor phase. Rotate the engine now to
the timing desired for max power note where the rotor is in relation to the distributor cap terminal. It
should be directly across. If not, and space allows, use MSD’s adjustable rotor or “Cap-a Dapt” to
correct the rotor phase. If space does not allow for a “Cap-a Dapt”, then you’ll need to modify the
reluctor position. See
Reluctor_Repositioning on page 23.
Electrical Connections
The MSD distributor 2 wire connector must be changed to the 2-way black male Metripack connector
(included with 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 distributor violet /black wire into cavity “A” of the black Metripack connector and
plug the other wire from the MSD distributor into cavity “B” of the black Metripack connector. The
red BigStuff3 wire needs to be connected to the violet /black striped MSD distributor wire. Next, plug
the connector from the distributor into the 2 wire (black) connector labeled “Crank” on the BigStuff3
harness.
Type 3 - MSD Distributor Used to Only Distribute Spark from an MSD 6A/7A/8… box, with a
Crank Trigger.
Using a crank trigger and a CDI ignition module, like an MSD 6A, a distributor can be setup to just
distribute spark, when used in conjunction with a crank trigger.
Quick Setup Guide
• Find TDC, cylinder number one (1), compression stroke. See
Find_TDC on page 20.
• Roll the engine back to 50 o
BTDC.
• Install the crank trigger making sure the arrows on the crank trigger wheel are going on the
correct direction! See Crank_Trigger_Considerations on page 21.
• Line up the crank trigger sensor with the magnet in the wheel. Connect the
red BigStuff3 wire
to green crank trigger wire. Connect other crank trigger wire to BigStuff3 black wire.
• Roll the engine back to the position BTDC (cylinder 1) equal to the max power timing.