After a few years away from the Sy/Ty scene, I finally got around to putting together my LS1 coil setup.
Parts that I am using
1/ eDist and universal harness pn: 30-5001 ~$300.00
2/ Crane Optical Trigger pn 700-0020 ~$30.00
3/ MSD Adapter harness pn 8876 ~30
4/ 6 LS1 coils with factory brackets ~$150.00
5/ 4.7k ohm resister ~$2.00
I am into to for about $510 bucks incl the shipping on the parts. (I made up coil brackets that allowed the use of std LS1 wires, saving some bucks).
The optical trigger is mounted into the stock distributor cap where the terminal for cyl 1 was and the "shutter" is the existing rotor. When the rotor passes between the trigger it causes the voltage to go high on the white wire. I am using a stock type distributor for the crank signal to the ECU which in turn provides the est line to the edist.
The MSD adapter harness allows me to plug into the stock lines without cutting them to get the tac signal and est. The only wire that is left hanging with no connector on it is the LOW REF line (D2 on edist); this wire i simply put a ring terminal on and put it on the bolt that holds the ICM to the distributor.
I have the edist configured as follows:
dip switches: 1,3,5,6,8 off; 2, 4, 7 on
Tonight, I finally started the truck up with it; and it WORKS! Runs perfectly.
EDIT:
I left off the requirement of the 4.7k ohm resistor. This goes between switched 12 and the EST line. I originally had the truck setup with dip 7 off and no resistor. This caused the timing to advance when the computer was commanding less advance. Setting dip 7 on and adding the resistor set everything exactly how it should be.
EDIT:
I did a quick visio of the wiring diagram, and uploaded the JPEG of it here: click here for diagram
Having done this now, I am 100% confident that this could be turned into a repeatable project/kit leaving little to no fabrication; and be affordable.
Cam sync mockup:
drivers side coils:
cap with no wires
Comments welcome. (on the idea, not the crappy photography
)
Parts that I am using
1/ eDist and universal harness pn: 30-5001 ~$300.00
2/ Crane Optical Trigger pn 700-0020 ~$30.00
3/ MSD Adapter harness pn 8876 ~30
4/ 6 LS1 coils with factory brackets ~$150.00
5/ 4.7k ohm resister ~$2.00
I am into to for about $510 bucks incl the shipping on the parts. (I made up coil brackets that allowed the use of std LS1 wires, saving some bucks).
The optical trigger is mounted into the stock distributor cap where the terminal for cyl 1 was and the "shutter" is the existing rotor. When the rotor passes between the trigger it causes the voltage to go high on the white wire. I am using a stock type distributor for the crank signal to the ECU which in turn provides the est line to the edist.
The MSD adapter harness allows me to plug into the stock lines without cutting them to get the tac signal and est. The only wire that is left hanging with no connector on it is the LOW REF line (D2 on edist); this wire i simply put a ring terminal on and put it on the bolt that holds the ICM to the distributor.
I have the edist configured as follows:
dip switches: 1,3,5,6,8 off; 2, 4, 7 on
Tonight, I finally started the truck up with it; and it WORKS! Runs perfectly.
EDIT:
I left off the requirement of the 4.7k ohm resistor. This goes between switched 12 and the EST line. I originally had the truck setup with dip 7 off and no resistor. This caused the timing to advance when the computer was commanding less advance. Setting dip 7 on and adding the resistor set everything exactly how it should be.
EDIT:
I did a quick visio of the wiring diagram, and uploaded the JPEG of it here: click here for diagram
Having done this now, I am 100% confident that this could be turned into a repeatable project/kit leaving little to no fabrication; and be affordable.
Cam sync mockup:
drivers side coils:
cap with no wires
Comments welcome. (on the idea, not the crappy photography
)
Last edited:
