Ls1 square coils power feed from relay to coils

Hi team,

Currently have a ls1 with the square coils,

Now the haltech elite 2500 fusebox has 1 14awg wire from the ignition coil relay to feed the coils.

Now I planned on running a dtm 12p per bank with 4x trigger 20awg, 4x 20awg m22759/32 which is spliced into the 14awg from power feed off relay and 4x 20awg ground which on the coil pack side I have spliced both signal and ground together before dtm connector.

So my question is will it be fine to run per wire size above in which I have 1x 14awg 12v feed spliced into 8x 20awg m22759/32 with each coil supplied with its own individual power from the 14awg along with same the ground side however signal ground is spliced into each ground on coils side of dtm connector.

Length of 20awg is 5 to 6 feet at max.

Happy for feedback if I can tackle this another way.

Cheers,

Steve

I don't see any problem with your wire sizes.

However, I think your trigger signal grounds from the coils should go to the DTM ground pins, the main coil ground should go to a ring terminal that attaches directly to the head.

Thanks David for your response,

So my next question is how would you go about taking said ring terminal through firewall separate to engine harness.

As currently the location of the coils are in the cabin I guess I'm just going to have to put in another grommet for said terminals or how would you tie it into the harness but still being able to be separated from main harness if needed.

I hope that makes sense what I'm asking.

Cheers,

Steve

Would a dt connector suffice in your experience? Or still recommending no connector on coil earth and grommet installed through firewall with direct ground wire from coil to head via the ring terminal directly.

If the coils are on the other side of a firewall from the engine, I would consider using a bulkhead stud and tie the coils to the stud on the cockpit side, and the engine head to the stud on the other side.

Here is the type of stud I'm thinking of:

https://www.summitracing.com/parts/sum-g1431

Thanks again David,

Great idea and will be the road I now take for this build.

Cheers Steve.