Largest possible batteries
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Cross-Country
Joined: Dec 2021
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From: FSJ BC
Largest possible batteries
'85 F350 6.9 w/ T19. Ambient air temp is about to hit -40C (-40F) as it does in my area regularly. Typically in the 20s and 30s thankfully.I was wondering if there's a battery bigger or more powerful that I can run (800(?)CA and 710 CCA at 0C currently) that will actually fit in the stock battery trays. For like almost $700 (I already have some like $300 into these batteries I'd just have to pay the difference) I can get two that are 1000 each I think. Might be my best bet but I thought I would ask y'all first.
More Turbo
Joined: Oct 2009
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From: West Plains, MO
Group 31 batteries (925 CCA) don't quite fit in the trays, but you can do a little cutting on the inside edges and then they fit. A popular mod for our trucks.
(I just had to replace mine and a pair of decent ones cost about $300).
(I just had to replace mine and a pair of decent ones cost about $300).
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Cross-Country
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From: FSJ BC
Thanks! Ya I saw that in the forum the other day. Battery trays need replacing one day so don't mind cutting them up. Just nothing to mount them with. I coulda sworn I saw some 1000 CCA red tops may have been 1000 CA but still pretty good. Going back to Canadian tire soon.
More Turbo
Joined: Oct 2009
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From: West Plains, MO
Hold-down kits (two J-bolts and a heavy plastic crosspiece) are readily available. I don't think I even had to drill any holes. Not sure what the original mounting scheme is - some batteries use a "wedge" piece that clamps the bottom of the battery rather than the more common up-and-over clamp.
Anyway, it all had to work better than the previous hack owner who just threw a piece of a truck mudflap in/on the tray, and set the 31's on it with no hold-downs whatsoever!
I'm amazed there weren't arc holes in the hood.
Anyway, it all had to work better than the previous hack owner who just threw a piece of a truck mudflap in/on the tray, and set the 31's on it with no hold-downs whatsoever!
I'm amazed there weren't arc holes in the hood.
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Cross-Country
Joined: Dec 2021
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From: FSJ BC
Hold-down kits (two J-bolts and a heavy plastic crosspiece) are readily available. I don't think I even had to drill any holes. Not sure what the original mounting scheme is - some batteries use a "wedge" piece that clamps the bottom of the battery rather than the more common up-and-over clamp.
Anyway, it all had to work better than the previous hack owner who just threw a piece of a truck mudflap in/on the tray, and set the 31's on it with no hold-downs whatsoever! I'm amazed there weren't arc holes in the hood.
Anyway, it all had to work better than the previous hack owner who just threw a piece of a truck mudflap in/on the tray, and set the 31's on it with no hold-downs whatsoever!
I'm amazed there weren't arc holes in the hood.Last edited by BullnoseLover6.9; Jan 7, 2022 at 10:54 AM. Reason: Messed up smilies
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Cross-Country
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From: FSJ BC
Go to your local hardware store and buy yourself some length of 1/4" flat stock. Cut to length, drill two holes, round off all sharp edges, paint - done! That's exactly how my own batteries were held in place at one point, you could shake the whole truck by the battery hold-downs and their bolts ain't even all that tight
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Cross-Country
Joined: Dec 2021
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From: FSJ BC
Just picked up mine, 1170 CA 950 CCA they're awesome. Now to get my alternator to charge them!
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Joined: Nov 2009
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From: Central NYS
Just how much is "a little" cutting? Can you tell me how the 31's fit? Looking to get a couple for my truck. Some say they "slide right in" no mods necessary, some say you gotta cut.
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