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Mechanical Question
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=22101		 Page 1 of 1
Author:  longarm [ Sat Jun 30, 2007 9:20 am ]
Post subject:  Mechanical Question
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Author:  Joe Romas [ Sat Jun 30, 2007 12:17 pm ]
Post subject: 
Every new one I looked at had a RED TOP
Author:  retmil46 [ Sat Jun 30, 2007 1:25 pm ]
Post subject: 
Question is, is the voltage regulator in your Rubicon good enough to keep the Optima happy? Being an '05, most likely having electronic voltage regualtor and battery temp sensor, my initial guess would be yes.

You don't want an Optima to see anything over 14.7 volts, or you'll end up cooking it inside of a couple months.
Author:  Reflex [ Sat Jun 30, 2007 6:10 pm ]
Post subject: 
Joe Romas wrote:
Every new one I looked at had a RED TOP

Yup, my 06 has a red top as well. I don't think I've seen one without those, in fact it was listed in the online build options as a mandatory item when you built one on Jeep.com if I remember correctly.
Author:  chadhargis [ Sat Jun 30, 2007 6:19 pm ]
Post subject: 
Humm...mine has a Napa battery in it. Bought it used with 9600 miles on it, so I doubt the Optima battery would have been kaput. Go figure?
Author:  JDaPP [ Sat Jun 30, 2007 6:37 pm ]
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mine Kaput at ~ 12000 and was replaced with a factory battery. The dealer said that they had problems with the Optima (they waited 3 weeks to find out it was backordered and if one came in they were to replace it with a factory battery)
Author:  oldnavy [ Sat Jun 30, 2007 8:32 pm ]
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So many dealers fried Optima's in the CRD's as to be crazy stupid, they had to put out service advisory about not charging above 14.5 volts if I remember correctly. I have had a 34R optima in my '91 MB for about 4 months w/o a problem and a Optima 34R in my Magnum for about 2 years without a problem either. I have friends with them in their boats, 4wheelers and tractors and just love them and never had any problems.
Author:  Bovie [ Sun Jul 01, 2007 1:31 am ]
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Optima's rule. Installed one in my MB 240D a few years back and never looked back (Much better starting power than the bigger DieHard). I was happy to see the Optima under the hood of the jeep and would be bleeping pissed if the service department tried to put in a regular battery if it ever died.
Author:  retmil46 [ Sun Jul 01, 2007 2:44 am ]
Post subject: 
oldnavy wrote:
So many dealers fried Optima's in the CRD's as to be crazy stupid, they had to put out service advisory about not charging above 14.5 volts if I remember correctly. I have had a 34R optima in my '91 MB for about 4 months w/o a problem and a Optima 34R in my Magnum for about 2 years without a problem either. I have friends with them in their boats, 4wheelers and tractors and just love them and never had any problems.


Exactly. If you have a good enough charger, you can go up to 14.7 without any problems.

Guys in the home-built electric vehicle community learned this the hard way better than 10 years ago. They found out you couldn't bulk charge in a series string like the old flooded golf cart batteries, where you could simply let them boil and bubble until all of them were up to the same state of charge. Overvoltage and boil an Optima, and it's dead in short order.

They had to install shunt voltage regulators on each battery, which would bypass the charging current around a battery, to be able to use a single charger and charge them in series. When you're talking 10 to 20 batteries in series, that gets to be an expensive proposition. Only other option was to have an individual charger hooked up to each battery - an even more expensive undertaking.
Author:  oldnavy [ Sun Jul 01, 2007 8:46 am ]
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I have had a small trickle charger that I have used for years to top up my batteries for about 7 years now. It is amazing how down a battery will get just because you start a car and drive it 3 or 4 miles then park it for a day, but more amazing is how you can improve battery life with a top up trickle charger for you vehicle.

I just topped up the 91 MB last night. I may be installing the quick plug on the E320 today, but I have a brand new Optima 34R sitting on the bench to go in if it will anchor down properly like it did in the Magnum. Yes I traded out the Optima in the Magnum into the 91 MB and got a new Optima for the E320 that was origionally ordered for the 91 MB, but I traded cars and things got switch around early. The new optmia arrived one week after the trade off of Magnum & Jeep.
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