Battery in Trunk Wiring That Exceeds NHRA Requirements

SpeedThrills said

View attachment 1715988433
Final pic, showing the 60a breaker
in the alt. charge wire. Tidyed it all up with some split wire loom wrap.
That leaves the 1/0 ga. cable from the cut off switch to the top of the factory starter relay. @crackedback, how many amps does that breaker need to be? I have a mini starter for a mid 90’s Dakota. I can only guess that it would be an educated guess, as the draw would be different depending on heat, compression, starter efficiency, etc.

Click to expand...

"I also put a 15a fuse each, in the switched power source wire, and the wire that goes to the middle of the factory starter relay (with the square retainer on it, don’t know what it’s called)."

WHY, on the ford relay? It's only on when you crank the engine, totally unnecessary.

The trigger wire to the CD relay is OK to have a fuse in it

Cable from the left side of your ford starter relay to the cutoff switch in your tail panel is the one that needs a breaker or fuse. That is the one that I suggested the breaker be installed on,
NOT the cable from the alternator, although you can certainly fuse it if you like.

Your starter relay up front is ONLY a buspoint. Look at the SCHEMATIC!!!! That 1/0 off your cutoff switch does NOTHING regarding the starter. NOTHING! Power for the starter is provided from cable on the right side of ford relay. I usually run a maxi fuse that pops at 40-60 amps on a 12v system on that line depending on expected loads.