okm12346
15+ Year Contributor
- 565
- 22
- Dec 3, 2007
-
Chicago,
Illinois
SO i have 4 coils that have the ignitor (power transistor) built in each one of them. They are 3 pin coils too . I have no problem with the harness, but Im not sure where to get the tach signal from since im gonna bypass the stock power transistor and the tachometer is sourcing its signal from it.
The options Im considering:
1. Get some sort of tach adapter that I have no idea which one.
2. Since stock power transistor is powered thru the coil, I'll just apply 12V to it and have it actually work w/o having the stock coils there, so all internals still operate and the COPs get signals directly from ECU
3. Do #2 and use the stock power transistor outputs to power the transistors in the COP. It would be like a transistor after transistor setup.
The options Im considering:
1. Get some sort of tach adapter that I have no idea which one.
2. Since stock power transistor is powered thru the coil, I'll just apply 12V to it and have it actually work w/o having the stock coils there, so all internals still operate and the COPs get signals directly from ECU
3. Do #2 and use the stock power transistor outputs to power the transistors in the COP. It would be like a transistor after transistor setup.