Hi everyone. So I'm going the route of a direct fire, coil on plug, sequential (whatever you prefer) for the ign coils. I run the infinity ecu and got those wires all covered. What I'm wondering and probably already know the answer for is the 12v switched power that charges the coils. The Aem diagram shows a separate relay for the ignition setup using the output of the main relay as a trigger for the add in ignition relay using a direct power wire from the battery. My question would it not be a good idea to bypass the relay and have the coils powered by the black with white stripe wire that was intended for the oem igniter? Attached is the pic of the factory ecu wiring with the wire circled I'm talking about. I understand that running a separate relay as aem has provided will insure a better voltage value to the separate coils, but is there any drawbacks bypassing it and using the other mentioned way of powering the coils?

 

Wire them from separate power.. don't use the OEM power wires. The IGN1a coils draw way to much current to use stock wiring.

Be careful how you ground them. They need to be grounded properly.... the AEM coil directions are quite specific... follow them 😎

 

If I recall correctly, the Sakebomb Ign adapter harness uses the stock ignitor power wire. You could checkout that set of directions or possibly use that harness and adapt it to your ecu.

 

I already built my entire harness for my aem ecu from scratch. Wont be too hard building my own ign harness. The OEM wire is gonna end up as a trigger wire for the relay. I'll give their instructions a look through.

 

Power from the starter or battery with a fuse on the relay - that's how sakebomb makes the harness. Then no issues with enough power.

 

Guys. Anyone know what is the Minimum sized wire awg/mm2 to use for the AEM coil? From my Haltech PS1000 there is a wire meantnfor ignition but it looks to ve around 16awg so quite skinny. Im considering just using it as a signal wire to a relay, which leads me to my next question. What size fuse should I use in combination with the relay?

 

I have discussed this with the designer of the coils, as well as Chris Ludwig and many others have documented this. The pins themselves only accommodate up to 18awg. You may be able to cram a 16awg wire in there, but there is no need. That is PER coil. Fuse typically 20A is adequate. You will run all coils off a relay switched direct connection to the battery.

 

Thanks! Any inputs on how thick wire I need Before I split it up into the 4 separate 16-18awg to each coil? I suppose something thicker is recommended? I'm asking cause I do have a 16awg available but feel like it wont be sufficient to support 4 coils.

 

Thanks! Any inputs on how thick wire I need Before I split it up into the 4 separate 16-18awg to each coil? I suppose something thicker is recommended? I'm asking cause I do have a 16awg available but feel like it wont be sufficient to support 4 coils.

 

Take a look at this thread: https://www.rx7club.com/haltech-foru...-e11v2-991984/