Optima Battery Failure Characteristics, Engine Turns over slower and slower |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Optima Battery Failure Characteristics, Engine Turns over slower and slower |
Spoke |
Jan 21 2008, 11:01 AM
Post
#1
|
Jerry Group: Members Posts: 7,052 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
I have a red top Optima battery in my 74 and over the last few months, the engine has been turning over slower and slower. What are the characteristics of the Optima when it is going bad?
Lead acid batteries usually just dump and won't start the car. I haven't checked the voltage at rest or while the engine is running to see if it's the battery or my charging system. I guess that will be tonight's activity. Can I use an external charger to try to put a full charge on the battery? Thanks, Spoke |
Andyrew |
Jan 21 2008, 07:59 PM
Post
#2
|
Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
I had my red top die, charged it up with my normal charger, and been using it in my DD for about 3 months now.. cranks 3 times faster than my other battery....
|
banger |
Jan 21 2008, 08:31 PM
Post
#3
|
Member Group: Members Posts: 354 Joined: 12-November 06 From: Santa Clarita Member No.: 7,205 Region Association: Southern California |
You just have to be careful about overcharging a sealed battery. With a normal battery, if you overcharge, the water will boil off. This is no big deal, since you can top it up. With a sealed battery, the water boils off and is contained in the battery, if only slightly overcharged. This water will be reabsorbed back into the battery. If you severely overcharge the battery, then the water will be vented out. This will reduce the water in the battery, and start to expose more and more of the plates. At the plate area goes down, the battery will lose capacity. Also if the battery sits too long in a discharged state, the battery will become sulfated, which will also reduce capacity. This can sometimes be partially fixed by cycling the battery on a pulse charger, or using a desulfator.
|
Lo-Fi Version | Time is now: 27th September 2024 - 05:46 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |