The Group 27 repro battery died on my Superbird and I decided to try gutting it and putting an Odyssey PC925 battery inside like others have done. I started with this link - post # 48135 https://board.moparts.org/ubbthreads/ubbthreads.php/topics/48134/3.html
, but did a few things differently. I first made sure to completly discharge the battery by connecting to a load tester for a few weeks. I then built a simple wooded frame to sit the battery in upside down to make it easier to work on and protect the battery caps from damage.
WARNING: Lead is hazardous to your health. Wear gloves and an approved respirator and keep everything wet when cutting.
Then drilled a few holes in the bottom to drain any liquid acid. Like the above post warned - drill holes in the 4 corners and leave part of the bottom in place so you don't crack the side walls. i used an air powered cutoff disk to slice the bottom of the battery around the edge and a few cuts down the middle. Then carefully break out sections of the bottom.
I just pried out all the old plates and used baking soda as I went to neutralize any acid. A long slow process!!!!
Then cut off the intercell lead posts.
Other people have drilled and tapped the Positive and negative lead posts inside the battery with limited success because the post is small (1/2") and the lead is soft. Thus it is hard to get a good solid connection.
My approach was to use some 1/2" copper tube and make some bushings to fill the space between a standard battery terminal and the 1/2" lead post. I cut 3 pieces of copper tube, cut out a small piece and put 3 inside each battery terminal. Place this over the post and tighten the clamp!! A nice solid connection. I just used a 16", 1 Ga battery cable. It is probably a few inches too long but it should fit OK.
The battery is on order, so will post a few more pics when I get it installed.
, but did a few things differently. I first made sure to completly discharge the battery by connecting to a load tester for a few weeks. I then built a simple wooded frame to sit the battery in upside down to make it easier to work on and protect the battery caps from damage.
WARNING: Lead is hazardous to your health. Wear gloves and an approved respirator and keep everything wet when cutting.
Then drilled a few holes in the bottom to drain any liquid acid. Like the above post warned - drill holes in the 4 corners and leave part of the bottom in place so you don't crack the side walls. i used an air powered cutoff disk to slice the bottom of the battery around the edge and a few cuts down the middle. Then carefully break out sections of the bottom.
I just pried out all the old plates and used baking soda as I went to neutralize any acid. A long slow process!!!!
Then cut off the intercell lead posts.
Other people have drilled and tapped the Positive and negative lead posts inside the battery with limited success because the post is small (1/2") and the lead is soft. Thus it is hard to get a good solid connection.
My approach was to use some 1/2" copper tube and make some bushings to fill the space between a standard battery terminal and the 1/2" lead post. I cut 3 pieces of copper tube, cut out a small piece and put 3 inside each battery terminal. Place this over the post and tighten the clamp!! A nice solid connection. I just used a 16", 1 Ga battery cable. It is probably a few inches too long but it should fit OK.
The battery is on order, so will post a few more pics when I get it installed.
