Join Date: Sep 1999
Location: Dalton, Georgia
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Need to upgrade my battery in 88 YJ
I'm still running the group 56 size battery in my YJ because it fits without any modification. After a terrible bout of luck with new style Optima Yellow tops, I would like to put an AGM style battery in because I squirt fluid out of my battery when I get a little "sideways" wheeling. The group 34 optima would only fit with a height adapter that came with it - it doesn't work with other batteries - I tried an exide orbital and it would NOT stay put with the adapter.
I was curious what you guys are running that have done a motor swap. That little battery has a hard time turning over my 4.3 V6 when its cold or really hot. It has jack for reserve capacity too. If my jeep sits for a week it will barely turnover - basically if the voltage drops below 12.5v it won't start sometimes. 2 weeks you can forget it. If I leave a trickle charger on it then no problem - off the charger the battery will be close to 13v. I had one yellow top 4 years ago that was fine - the jeep could sit for months with no issues - after that no good optimas for me.
I would like to get a better CCA for the Chevy motor like the old optimas - maybe an Odyssey? I just don't know how to get a physically bigger battery in the YJ's battery tray. I also understand that the 87-90 battery trays are different than the 91-95s are - don't know how though.
Any battery upgrade/fitment suggestions?
88 YJ (sort of)
Last edited by Hank; 06-13-2013 at 09:15 AM.