Ignition control
SparkLogic
Coil drop and timing retard for Gen III Hemi engines, commanded by GripLogic with no Holley ECU.
SparkLogic circuit board, top side.
What it does
- Takes the same two retard and drop command wires GripLogic sends a Holley ECU.
- Retards timing by delaying the crank and cam signals, with a bypass relay that passes them through untouched if the box fails.
- Drops cylinders by switching each coil's power feed, at zero coil current.
- Works with stock two-pin coils or smart coils.
Specifications
| Application | Gen III Hemi |
|---|---|
| Coil switches | 8 solid-state high-side switches |
| Processor | High-speed 32-bit microcontroller |
Pinout
PowerGroundInputOutputNot used
Coil connector
Deutsch DT13-12PA. Columns as they sit on the board.
- 1Coil 1 out
- 2Coil 3 out
- 3Coil feed in (ASD)
- 4Ground
- 5Coil 5 out
- 6Coil 7 out
- 7Coil 8 out
- 8Coil 6 out
- 9Ground
- 10Coil feed in (ASD)
- 11Coil 4 out
- 12Coil 2 out
Signal connector
Deutsch DT13-12PB. Columns as they sit on the board.
- 1Crank sensor in
- 2Crank signal to PCM
- 3Cam sensor in
- 4Cam signal to PCM
- 5PCM sensor 5 V (tap)
- 6Sensor ground
- 7Retard in from GripLogic
- 8Drop in from GripLogic
- 9Key-on 12 V
- 10Ground
- 11Spare
- 12Spare
Not to scale. Check the numbers molded on the connector before wiring. Pin colors only show each pin's function. They don't reflect the actual wire colors of any included pigtail.
Before you buy
- Competition use only. The stock PCM may log crank and misfire codes, which the race tune has to account for.