80s Lean Burn distributor and Fitech EFI
This was a misunderstanding I also had until I dug further into it.
The Fitech ECU has the ability to trigger the coil and control spark. It can directly take the place of an ignition box. That black wire can ALSO be run to the "points input wire" on a MSD or similar CDI box to command it to trigger.
It can also run as fuel mixture control only, utilizing that blue wire as a tach signal wire instead of controlling the coil. The only interaction with the ignition system then is using it for an RPM signal. As my current ignition system is functional, I was going to start out that way until I was satisfied the Fitech unit functions correctly, then hook it up for timing control.
One question I am still trying to find answers to is what kind of coil the Fitech ECU is capable of running. The guy I talked to on the phone basically told me to delete the ballast resistor and orange box and not worry about it. Can it run an e-core coil? Canister? Is there an ohm and voltage spec for the coil? He didn't know any of those things.
This was a misunderstanding I also had until I dug further into it.
The Fitech ECU has the ability to trigger the coil and control spark. It can directly take the place of an ignition box. That black wire can ALSO be run to the "points input wire" on a MSD or similar CDI box to command it to trigger.
It can also run as fuel mixture control only, utilizing that blue wire as a tach signal wire instead of controlling the coil. The only interaction with the ignition system then is using it for an RPM signal. As my current ignition system is functional, I was going to start out that way until I was satisfied the Fitech unit functions correctly, then hook it up for timing control.
One question I am still trying to find answers to is what kind of coil the Fitech ECU is capable of running. The guy I talked to on the phone basically told me to delete the ballast resistor and orange box and not worry about it. Can it run an e-core coil? Canister? Is there an ohm and voltage spec for the coil? He didn't know any of those things.