Any tutorials out there on converting a Group 27 to a AGM ?
#3269020
11/07/24 11:04 PM
11/07/24 11:04 PM
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Joined: Feb 2005
Posts: 2,176
God's Country - Etowah, TN.
A34
OP
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OP
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Joined: Feb 2005
Posts: 2,176
God's Country - Etowah, TN.
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Hey Guys,
I have an old Group 27 that I'd like to convert to a modern AGM battery. Any tutorials out there on how to do it, what parts to buy, etc?
Thanks!
God Bless America, Our Troops and Their Families !
DEO VINDICE
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Re: Any tutorials out there on converting a Group 27 to a AGM ?
[Re: A34]
#3269069
11/08/24 09:23 AM
11/08/24 09:23 AM
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Joined: Dec 2003
Posts: 6,743
KY
65pacecar
master
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master
Joined: Dec 2003
Posts: 6,743
KY
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Re: Any tutorials out there on converting a Group 27 to a AGM ?
[Re: 68jim]
#3269244
11/08/24 09:45 PM
11/08/24 09:45 PM
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Joined: Feb 2005
Posts: 2,176
God's Country - Etowah, TN.
A34
OP
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OP
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Joined: Feb 2005
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God's Country - Etowah, TN.
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Messy job for sure - I did this to my battery in the RR about 7-8 years ago and cranks over the Hemi with no problems. I tapped the bottom of the posts to secure the terminal lugs but also like the idea of creating the copper sleeves to gain the better fit for standard battery connections. '' Good idea!
God Bless America, Our Troops and Their Families !
DEO VINDICE
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Re: Any tutorials out there on converting a Group 27 to a AGM ?
[Re: A34]
#3269257
11/08/24 11:26 PM
11/08/24 11:26 PM
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Joined: Jan 2004
Posts: 4,696
Motor City
6PKRTSE
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master
Joined: Jan 2004
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Motor City
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I have converted/gutted 3 of my batteries all with great results. As the above link showed. Here is mine.
1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.
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Re: Any tutorials out there on converting a Group 27 to a AGM ?
[Re: A34]
#3269641
11/10/24 02:34 PM
11/10/24 02:34 PM
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Joined: Jan 2003
Posts: 21,783
N.E. OHIO, USA
A12
Too Many Posts
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Too Many Posts
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N.E. OHIO, USA
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Hey Guys,
I have an old Group 27 that I'd like to convert to a modern AGM battery. Any tutorials out there on how to do it, what parts to buy, etc?
Thanks! Do you me convert to a lithium-ion battery and not an AGM battery? AGM is a semi "wet" or flooded battery with an absorbent material between the plates that doesn't leak or spill for the most part as the glass mat maintains the acid inside the battery, Group 27 (and group 24) AGM OE copy batteries have been around for a while (hard to find lately  ) if that's what you're looking for but I think you're for a basically dry and light weight lithium-ion battery or a way to convert an old failed AGM battery case by putting a smaller lithium-ion battery inside. Is this the plan? AGM = Absorbent Glass Mat
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Re: Any tutorials out there on converting a Group 27 to a AGM ?
[Re: A12]
#3269746
11/10/24 10:26 PM
11/10/24 10:26 PM
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Joined: Feb 2005
Posts: 2,176
God's Country - Etowah, TN.
A34
OP
top fuel
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OP
top fuel
Joined: Feb 2005
Posts: 2,176
God's Country - Etowah, TN.
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Hey Guys,
I have an old Group 27 that I'd like to convert to a modern AGM battery. Any tutorials out there on how to do it, what parts to buy, etc?
Thanks! Do you me convert to a lithium-ion battery and not an AGM battery? AGM is a semi "wet" or flooded battery with an absorbent material between the plates that doesn't leak or spill for the most part as the glass mat maintains the acid inside the battery, Group 27 (and group 24) AGM OE copy batteries have been around for a while (hard to find lately ) if that's what you're looking for but I think you're for a basically dry and light weight lithium-ion battery or a way to convert an old failed AGM battery case by putting a smaller lithium-ion battery inside. Is this the plan? AGM = Absorbent Glass Mat I did not think of a lithium-ion battery, but I suppose that would definitely be better. What I have is a failed repro battery, that is probably a lead-acid one and not AGM. Are you aware of any lithium ones that would do the trick here? Thanks!
God Bless America, Our Troops and Their Families !
DEO VINDICE
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Re: Any tutorials out there on converting a Group 27 to a AGM ?
[Re: A34]
#3277548
12/22/24 01:19 AM
12/22/24 01:19 AM
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Joined: Jan 2003
Posts: 7,588
Minnesota
Hemi_Joel
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master
Joined: Jan 2003
Posts: 7,588
Minnesota
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I use the Antigravity ATX20-HD. It weighs 5 lb and spins my 13 to 1 Hemi over like the plugs are out of it.
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: Any tutorials out there on converting a Group 27 to a AGM ?
[Re: Hemi_Joel]
#3277577
12/22/24 09:17 AM
12/22/24 09:17 AM
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Joined: Aug 2005
Posts: 1,396
Az
69hemibeep
pro stock
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pro stock
Joined: Aug 2005
Posts: 1,396
Az
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I just cut the bottom out of mine to discover this. I could see cables and a smaller battery when I unscrewed the red caps.PC950
The one before was an AGM and it was messy but I drilled pilot holes into the bottom of the posts and used small lag bolts to attach the cables.
Last edited by 69hemibeep; 12/22/24 09:22 AM.
1969 Hemi Roadrunner 2nd owner
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Re: Any tutorials out there on converting a Group 27 to a AGM ?
[Re: 69hemibeep]
#3277599
12/22/24 11:43 AM
12/22/24 11:43 AM
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Joined: Jan 2003
Posts: 7,588
Minnesota
Hemi_Joel
master
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master
Joined: Jan 2003
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Minnesota
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I don't under understand how your cables are connected to the old battery inside. Can you please clarify?
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: Any tutorials out there on converting a Group 27 to a AGM ?
[Re: Hemi_Joel]
#3277714
12/23/24 08:14 AM
12/23/24 08:14 AM
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Joined: Feb 2011
Posts: 1,037
MN
Droop69
super stock
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super stock
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MN
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I use the Antigravity ATX20-HD. It weighs 5 lb and spins my 13 to 1 Hemi over like the plugs are out of it. This battery lists for as much as the reproduction. $300.00 to $400.00.
Last edited by Droop69; 12/23/24 08:15 AM.
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Re: Any tutorials out there on converting a Group 27 to a AGM ?
[Re: Hemi_Joel]
#3277715
12/23/24 08:21 AM
12/23/24 08:21 AM
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Joined: Aug 2005
Posts: 1,396
Az
69hemibeep
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pro stock
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Az
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I don't under understand how your cables are connected to the old battery inside. Can you please clarify? The one pictured, the cables were poured into the lead posts by the original manufacturer. The one I did years ago was an AGM that I gutted and drilled the bottom of the post and lag bolted cables to. I can get a picture of it if you like!
1969 Hemi Roadrunner 2nd owner
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Re: Any tutorials out there on converting a Group 27 to a AGM ?
[Re: 69hemibeep]
#3277773
12/23/24 03:17 PM
12/23/24 03:17 PM
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Joined: Apr 2011
Posts: 318
Ontario, Canada
RealWing
enthusiast
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enthusiast
Joined: Apr 2011
Posts: 318
Ontario, Canada
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Napa Proformer battery (24C-6) with topper and mopar script added.
1970 Superbird 440-6bbl, auto
1969 Barracuda 340-4bbl, FB Formula S auto
1969 Barracuda 6.1 L Hemi, 5 speed, Convertible
2022 Can Am Spyder RTL
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Re: Any tutorials out there on converting a Group 27 to a AGM ?
[Re: RealWing]
#3278742
12/28/24 08:13 PM
12/28/24 08:13 PM
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Joined: Jan 2007
Posts: 537
Charlotte, NC
Kowal
mopar
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mopar
Joined: Jan 2007
Posts: 537
Charlotte, NC
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I have done this a couple of times with repro batteries. Picked up an appropriately sized AGM battery from Battery Mart, cut the top off the reproduction battery box at the seam with a dremel and swapped out the guts. ‘Glued” the box back together with black RTV.
'69 Hemi Charger 500, ‘70 U code Challenger R/T (These and a bunch others at www.dkowal426.com) P.J. O'Rouke: "The old car ran perfectly, right up until it didn't."
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