Re: ground for battery in trunk.. this tab ok?
[Re: Exit1965]
#2694861
09/06/19 04:43 AM
09/06/19 04:43 AM
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Joined: Jan 2003
Posts: 2,364 PA
70HemiGTX
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,364
PA
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Nope. Factory frame or aftermarket frame in the rear? If factory, I'd run one to the frame AND one all the way up to the engine block. Yes it is over-kill, but you can never have too good of a ground. Also the heaviest cable you can get your hands on.
Last edited by 70HemiGTX; 09/06/19 06:28 AM.
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Re: ground for battery in trunk.. this tab ok?
[Re: 70HemiGTX]
#2694873
09/06/19 07:25 AM
09/06/19 07:25 AM
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Joined: Nov 2004
Posts: 25,050 Texas
GoodysGotaCuda
5.7L Hemi, 6spd
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5.7L Hemi, 6spd
Joined: Nov 2004
Posts: 25,050
Texas
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I wouldn't rely on that to start the engine on.
I made an aluminum bracket that tied to the two tie down hook points on the back of the RH rail on my 'Cuda. I do not have a battery to block ground, I have one solid battery to chassis and two engine to chassis grounds up front.
Last edited by GoodysGotaCuda; 09/06/19 07:26 AM.
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Re: ground for battery in trunk.. this tab ok?
[Re: Exit1965]
#2694899
09/06/19 09:57 AM
09/06/19 09:57 AM
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Joined: Apr 2003
Posts: 12,244 Looking for a way out of Middl...
IMGTX
I Live Here
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I Live Here
Joined: Apr 2003
Posts: 12,244
Looking for a way out of Middl...
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I run mine to the trunk latch bolt. Worked fine for years. Always run a negative wire smaller than the positive wire running to the front. If the positive wire grounds and they are the same size it will burn both wires sparking a fire along the whole car. If the ground is smaller, only the ground burns and it will be limited to the trunk. Kinda like an emergency fuse. I suggest at least 2 sizes smaller. For those who think it won't happen it did to me. Trunk filled with smoke but the car was OK. There are other methods that help prevent it but even with those in place this method costs nothing to do. One method is to put a solenoid on the positive going to the starter in the trunk so the main battery cable is not live all the time but it still has to go live to crank. If it goes live to turn the starter and the positive wire is grounded it will still burn the car.
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Re: ground for battery in trunk.. this tab ok?
[Re: TJP]
#2694939
09/06/19 11:31 AM
09/06/19 11:31 AM
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Joined: Feb 2005
Posts: 529 SW CO
HemiSportFury
mopar
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mopar
Joined: Feb 2005
Posts: 529
SW CO
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I've used that spot without a problem. Clean both sides and use large washers of both sides to ensure a large contact area. I do have an aircraft circuit breaker on the positive side that also serves as a battery disconnect/anti-theft device.
'64 Sport Fury, 528 Hemi, FiTech EFI, 4-speed, 4.10 Dana 60 '57 Belvedere 2dr sedan, current project in process '19 Cherokee Trail Hawk Elite '03 Ram 2500 CTD HO, 6-speed 214,000 miles and still going strong
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Re: ground for battery in trunk.. this tab ok?
[Re: HemiSportFury]
#2694971
09/06/19 01:38 PM
09/06/19 01:38 PM
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Joined: Jan 2003
Posts: 20,892 A collage of whims
topside
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,892
A collage of whims
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I've used that location, a similar factory hole at a rear body panel gusset, and similar holes at the trunk latch support. Worked fine in every case, whether a 512" Duster, various vintage race cars, early B bodies. My car in the avatar's been that way for over 30 years. I also always add a heavy ground cable from block to chassis. Fasten all ends as previously noted, and I like star washers to dig in. On a unibody car, the chassis and parts welded to it become the "frame". On something with a separate body/frame construction & isolators, I add ground cable frame/subframe to body.
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Re: ground for battery in trunk.. this tab ok?
[Re: Exit1965]
#2694976
09/06/19 01:53 PM
09/06/19 01:53 PM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Yes, that location works for a chassis ground, and it has worked on my Charger for 25 years, but you may get a bit less charging voltage at the battery? If running EFI, or other computer stuff, it would be good idea to run another ground from the battery to the computer equipment, and not ground it to the chassis ground.
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Re: ground for battery in trunk.. this tab ok?
[Re: AndyF]
#2695146
09/07/19 09:43 AM
09/07/19 09:43 AM
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Joined: Jan 2003
Posts: 2,364 PA
70HemiGTX
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,364
PA
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It was mentioned to run a smaller ground wire as a "fuse". Why not just go to NAPA and buy a 100 amp ( I think that is what I have in, but not sure.) fuse and put that in the positive cable right at the battery. Much safer than relying on a homemade "fusible link". NAPA has different amp fuses for them. Very nice item. Not real expensive either. Remember even though your ground wire burns off, your positive wire still has power in it, making it a possible arc point. Fusing it right at the battery limits the amount of powered cable to a few inches. I tried to attach a photo of the fuse I used. Don't know if it worked or not.
NAPA part #
BK 7821143
Lists for less than $12.
Last edited by 70HemiGTX; 09/07/19 09:47 AM.
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Re: ground for battery in trunk.. this tab ok?
[Re: moparx]
#2695183
09/07/19 11:26 AM
09/07/19 11:26 AM
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Joined: Feb 2005
Posts: 20,197 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,197
PA.
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The stuff that we got away with 30 years ago doesn’t work as well as it did back then. Everything is electronically controlled now so do it right and reap the benefits. Good grounds are so important
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: ground for battery in trunk.. this tab ok?
[Re: moparx]
#2695303
09/07/19 09:00 PM
09/07/19 09:00 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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and if you are contemplating new battery cables and even THINKING about those cheep-o bolt on cable ends at the battery, can you get small gauge (large) molded cable battery terminal ends?
live every 24 hour block of time like it's your last day on earth
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Re: ground for battery in trunk.. this tab ok?
[Re: 70HemiGTX]
#2695408
09/08/19 11:06 AM
09/08/19 11:06 AM
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Joined: Apr 2003
Posts: 12,244 Looking for a way out of Middl...
IMGTX
I Live Here
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I Live Here
Joined: Apr 2003
Posts: 12,244
Looking for a way out of Middl...
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It was mentioned to run a smaller ground wire as a "fuse". Why not just go to NAPA and buy a 100 amp ( I think that is what I have in, but not sure.) fuse and put that in the positive cable right at the battery. Much safer than relying on a homemade "fusible link".
Starters can pull more than 100 amps. It's not about fusing the auxiliary systems it's about protecting the main power wire to the starter. I have had the starter come loose and when I went to start the car that is when all heck broke loose. Factory trunk mounted cars use a similar method or use non burn wiring covers(like a fusible link has) to prevent the car from burning if the main trunk line gets shorted. Like you pointed out though. Auxiliary systems should always be fused with a fuse or fusible link.
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