Where can one shop for the Optima battery? and how much weight savings are we talking about over a stock Porsche battery?

 

Optima aren't worth it. the cost of the battery + adapter plate + install = too much.
But if you want to D.I.Y.
http://www.dietersmotorsports.com/tech/2002/02-2003.htm

Please save youself the $$$ and read.....
http://www.renntech.org/forums/index.php?showtopic=2950

 

I just dealt with this same issue, it's not nearly as complicated as everyone says. First call Erica@Optima (888-867-8462) and ask her to overnight you a pair of Black (not Red) Euro Adapters, then go to Pep Boys or Costco and buy an Optima Red 75/35 or 75/25 (newer version). For more detailed information, go to www.rennlist.com and then to the 996 GT3 forum and do a search on Optima Batteries. This site was also helpful: www.1st-optima-batteries.com/ (scroll down to Optima Starter Batteries).

 

Hmm- I beg to differ. The battery I just installed says in big letters "Zero Point Module (ZPM)" and came with a 10,000 yr warranty. Not sure of the manufacturer or specific model, but for sure it does not use acid.

I had to mod a custom lead surround shield to reduce affects of scattered quantum particle radiation, but other than that it seems to be a real winner.

I love Ebay!

 

My only reason to go with Optima is for weight reduction....when all is said and done what do you think the weight savings would be over a stock battery?

 

The only thing about the 75/25 is that it only has 720CCA (vs. 800 for the 34) and 90 minutes of reserve capacity (vs. 100 for the 34).

If you want the link to my detailed installation instructions for installing an Optima group 34, they're on Renntech:

http://www.renntech.org/forums/index.php?showtopic=7072

 

My stock Moll battery was around 35lbs, I have been told that a standard 996 battery is about 50lbs, the Optima is 33.1lbs. If you want an ultra light weight battery, go with an Odyssey or Braille. Both of these "super" batteries will need a special bracket in order to secure as well as a battery tender if you don't drive the car daily. Also, my Optima has 910 CA's at 32 degrees F, I personally don't need a lot of CCA's because I live in L.A. I'm not saying that the Optima is the best battery, but it works for me!

 

I just bought the Optima Yellow Top (model 35) at Costco and before I mount it .. I thought I'll ask the group if the battery is suitable for my 996. It is labeled and rated as 810 CCA, 650 AH, and 98 RC. It has the reversed post which caught my eyes. I noticed majority of folks went with RedTop 34R.

 

I fu*ked around with a replacement battery that didn't fit and ended up getting the OEM battery that belongs there.
My original battery lasted 44,000 miles in S Florida.

 

I just put an interstate MTP-93 in my 996 C4S yeterday. I was told that it is a direct fit but I found it to be too long. I took out the battery mount pan and insert a bolt in the extra hole on the end to tie it down with a nut. To be safe, go with the MTP-91 as it is a shorter battery. Just make sure you ask for the vent hose. The attachment for the oem battery is not a direct fit for an interstate battery. Terminals are 10mm and the tie down is 13mm. I'm looking into a battery maintainer, just haven't decided on which one to go with. Group 48 batteries is what you should be looking for fitment.

 

never heard of a 10,000 year battery........try to get warranty at the 9000 year mark, lol

anyway, i am sure it uses some type of acid (gel i'm sure) or is a small nuclear device.

The difference between regular and gel cells is the probability of a spill is much less with a gel. and we all know what acid can do to paint.....

i got a 34R in mine and have had no problems since new (2+ years)

jorge

 

This thread is heating up!! LOL

I replaced my 6 yo Moll battery with one from Walmart for $70. Everlast 48 group size. It has all the hoses. Easy to install and lighter than Moll by about 3-5 lbs. Fit original bolt down without issue. 2 yr full replacement and pro rated after than for 8 or 9 yrs.

Walmart was cheaper than autoparts stores selling all at $90 (kragen, pepboys, autozone) and they were the only one opened last night. I think Costco sell this size as well but they were closed way early.

I didn't want to bother with any modification of the battery tie down or tray. Too much trouble...

 

MTP-93 is a direct fit for a turbo....91 for NA (AFAIK)...I got the interstate maintainer that connects to the terminals of the battery and has a cord with a plug-in that attaches to the charging mechanism.

 

Rennline has a pretty slick setup

http://www.rennline.com/prodinfo.asp...ation=PC925MJT
http://www.rennline.com/prodinfo.asp?number=EL30%2E34

 

Autozone's Duralast here, too.

If you inadvertantly leave the Recaro's fan on, it WILL kill a battery. two guesses how I discovered this fact...
(thankfully it was the wife's seat that had the fan switched on)