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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2006 Posts: 22 New Guy | | New Guy Joined: Sep 2006 Posts: 22 |
'57 Big Window 3100
'53 Five Window 3100
| | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Snowdog,
My book of wonders says that a 6 volt battery at 100% charge should read 6.3 volts...I guess this means that 3 X 2.1 = 6.3 volts.
If you have a hydrometer, you can read the specific gravity of each cell. This simple test will find a dead or weak cell in a hurry.
Stuart | | | | | Joined: Nov 2001 Posts: 122 Shop Shark | | Shop Shark Joined: Nov 2001 Posts: 122 | Not that this answers your question, but I think I remember hearing of a battery that was 8 volt. It was supposed to be safe to run 6 volt equipment on and had just a little extra to make starting easier. That's just from memory though, maybe I'm wrong. | | | | | Joined: Aug 2007 Posts: 1,859 Grumpy old guy playing with trucks, cars, and boats | | Grumpy old guy playing with trucks, cars, and boats Joined: Aug 2007 Posts: 1,859 | Since SAE defines a 12VDC system as having nominal voltage range of 9 to 16, it would make sense that a 6VDC system would have a range of 4.5 to 8.
Just my $0.02
The problems we face today can not be addressed at the same level of intelligence we were at when we created them - Albert Einstein Or with the same level of $ - Me
| | | | | Joined: Nov 2002 Posts: 1,002 Shop Shark | | Shop Shark Joined: Nov 2002 Posts: 1,002 | A very long time ago, someone told me Packard used a 9v battery. I don't remember all the particulars, but should be easy enough to check if interested.
Larry
I don't own a vehicle that isn't old enough to drink.
| | | | | Joined: Sep 2006 Posts: 3,596 'Bolter | | 'Bolter Joined: Sep 2006 Posts: 3,596 | There have been similar threads on here regarding the 8-volt tractor batteries used in 6-volt applications. Seems like for some it works good for others they blow lights and fuses. | | | | | Joined: May 2001 Posts: 1,907 'Bolter | | 'Bolter Joined: May 2001 Posts: 1,907 | Have you noticed that vehicle lights are now listed as 7 volts or 14 volts (not 6 and 12)? These must be the charging voltages and not the battery outputs.
1948 3/4-Ton 5-Window Flatbed Chevrolet 34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
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