Vag Coil Diy loom wire guage selection

[Manur33]

Hi, i’m making Vag coil loom for rb25det, can anyone confirm the wire guage i’m using for power supply in diagram is enough for supply not too small for loom? For earth do i need to follow the same procedure or i can use only 16awg wire for all coil and their connecting wire following to the plug?

[MBS206]

Don't step down power supply size, maintain it the whole way. It's how I'd do it. OR, Id have one feed, with one joint that splits out to six smaller gauge wires that go to each coil. I wouldn't add joins like stepping from 12 to 16, at the first two coils, as if you try to continue that fashion, each joint will introduce a voltage drop.

In theory, earths should be the same size as power feeds, however in this case the main power needs to be bigger due to the average size current.

So the next question is, how much current do these coils actually need?