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Old 08-01-2004, 11:28 PM   #1 (permalink)
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Cable size for battery in trunk

I'm setting up a 65 comet for racing and I'm putting the battery in the trunk. Im not sure what size battery cable or welding cable to run to the trunk. Would my stock altenator be ok to use.
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Old 08-02-2004, 12:13 AM   #2 (permalink)
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Cable size for battery in trunk

I used # 2 welding cable. and yes your alt will work fine.
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Old 08-02-2004, 04:52 AM   #3 (permalink)
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Cable size for battery in trunk

I'd use at least a 2 gauge wire. Bigger if possible. Also make sure that you use the same size for the ground as well. My Galaxie has 1/0 gauge to the back, the ground, and the leads off the alternator.
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Old 08-02-2004, 07:22 PM   #4 (permalink)
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Cable size for battery in trunk

I used # 1 welding cable to move the battery in my '66.Make sure you run a ground cable from the frame to the engine when you do this. When I moved the battery to my trunk , I just cut the old ground cable that went from battery to the engine and attached it to the frame. I also ran a ground from the engine to the body of the car. You can't have too many grounds!!!
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Old 08-02-2004, 11:24 PM   #5 (permalink)
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Cable size for battery in trunk

If you run aluminum heads, run a ground strap from each head to the chassis or to your dedicated cable back to the battery.
Hard to make a good ground with dis-similar metals; AL heads on an Iron block with a non-conductive gasket in the middle to boot.
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Old 08-03-2004, 12:49 AM   #6 (permalink)
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Cable size for battery in trunk

Just out of curiosity (in other words because I don't know) why would heads need to be grounded at all unless you try to ground something else to them?
Edited for: duh, the spark plugs maybe? sheesh I'm dense sometimes.
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[ This Message was edited by: casadepunklife on 8/3/04 11:51am ]
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Old 08-03-2004, 02:57 AM   #7 (permalink)
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Cable size for battery in trunk

where do you guys get welding wire? I was going to do a relocation, but went to Lowes and all I found was some really stiff wire in 2ga and thicker. It seemed so stiff that it would be hard to get around the car to where you needed it.

Thanks,
Justin
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Old 08-03-2004, 07:43 AM   #8 (permalink)
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Cable size for battery in trunk

national welding supply or a similar welding supply store
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Old 08-03-2004, 10:10 AM   #9 (permalink)
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Cable size for battery in trunk

...also solder the terminals on to the cables. You can do this by melting solder in the terminals with a propane torch with the terminals clamped upside down in a vise, and then with the solder molten, pushing the cable in the molten solder and letting it harden. My buddies at MSD actually tested running grounds on engines with aluminum heads and gained 9 HP just by grounding each head to the chassis. This is because the spark takes place in the heads.
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Old 08-03-2004, 10:43 AM   #10 (permalink)
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Cable size for battery in trunk

Would a torque strap be a substitute for the cable? Running from each head to the frame rail. I also use an Cometic Multi Layer Steel head gasket, which should provide a better path. Lastly..you have a good contact at MSD?

Ron

[ This Message was edited by: Ron1 on 8/3/04 9:48pm ]
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Old 08-04-2004, 03:29 AM   #11 (permalink)
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Cable size for battery in trunk

Lots of them, they are right down the road from me. What do you need?
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Old 08-05-2004, 01:59 PM   #12 (permalink)
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Cable size for battery in trunk

Summit Racing has a few different trunk mount kits, that are pretty cheap and come with lots of feet of cable and all the terminals you need to relocate to the trunk.
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