Parts Catalog Accessories Catalog Tech Info Tech Forums
 
  Search our site:    
 Cart  | Project List | Order Status | Help    
  We salute a legendary member of the community.
Thank you for selflessly sharing your wisdom with us...
Go Back   Pelican Parts Technical BBS > 1- Porsche Technical Forums > Porsche 911 Technical Forum

Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
dan79brooklyn's Avatar
 
Join Date: Nov 2004
Location: Okayama, Japan
Posts: 828
Battery replacement for 911sc?

I want to keep the stock mountings and easily found replacement...Do I go with Interstate about $100 and 48lbs. Any other preferences for a good battery brand, Car has been sitting 2-3 weeks between drives.
Old 02-06-2005, 06:33 PM
  Recommend this thread for the PelicanWiki    Reply With Quote #1 (permalink)
Registered User
 
ruf-porsche's Avatar
 
Join Date: Feb 2000
Location: no where
Posts: 4,390
SEARS carry a battery that is a bolt in using the stock mounts. I think it their international series.
Old 02-06-2005, 07:11 PM
  Recommend this thread for the PelicanWiki    Reply With Quote #2 (permalink)
Registered User
 
Join Date: Aug 2002
Location: Orchard Park, NY
Posts: 10,511
Don't forget that the lower/front hold-down clamp can be attached in 3 different places up front on the car.....allowing three different length batteries.

The kahuna size we all seem to get from the factory is the longest ( group size 49), but the next smaller group size 48 should work well and give you a bit more room to horse the battery in and out when needed.

Or simply go Optima....


Wil
__________________
Wil Ferch
85 Carrera ( gone, but not forgotten )
Old 02-07-2005, 05:33 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #3 (permalink)
Registered User
I use the Interstate battery......love it. You may want to keep a Battery Tender on it between drives.
__________________
Warren & Ron, may you rest in Peace.
Old 02-07-2005, 05:45 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #4 (permalink)
Registered User
 
earlyapex's Avatar
 
Join Date: Nov 2004
Location: Salinas, CA
Posts: 887
I have a Sears battery too. You really should look into a battery tender if your car sits that long between drives.
__________________
Eric
1978 spec 911
1998 C2S
Old 02-07-2005, 05:49 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #5 (permalink)
Registered User
 
Join Date: Feb 2000
Location: Monroe, Louisiana
Posts: 1,105
I also had the Interstate in my SC. It was a perfect fit although a bit
tight. If I had to put another battery in an SC I'd go Optima for the
room.
Old 02-07-2005, 05:51 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #6 (permalink)
Registered User
 
vash's Avatar
 
Join Date: Sep 2003
Location: hard to tell, with all the sticking and moving!
Posts: 20,435
Garage
Send a message via AIM to vash
you know....i love the optima battery (one in my truck). but the PO put in a brand new interstate battery when he sold me the car, the SC. i sometimes go weeks without driving either vehicle. the truck sometimes sees low voltage, and the SC, NEVER! i expect good things from the interstate. i was going to swap the batteries, but i decided to let things stay as is. i am not convinced that i will buy another optima.
__________________
1981 white 911SC coupe "Betty Whitey".
Old 02-07-2005, 09:11 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #7 (permalink)
Registered User
 
Join Date: Nov 2002
Posts: 1,955
It always seems to come down to Interstate v. Optima!

Never had an Optima, so I don't know about that. Had every other kind of battery, though. Interstate, Sears Diehard, Pep Boys, etc. etc. Of all those, Interstate stands way above. I think the shortest life I ever got from an Interstate was close to 10 years. And that's with abuse - letting the car sit for weeks at a time with no battery tender on it.

The Interstate in my daily driver BMW is at least 8+ years and still going strong.
Old 02-07-2005, 09:16 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #8 (permalink)
Registered User
Optima sounds great but the common report of having to electrecute the thing to revive it has me a bit leary.
__________________
Warren & Ron, may you rest in Peace.
Old 02-07-2005, 09:20 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #9 (permalink)
Registered User
 
Join Date: Aug 2002
Location: Orchard Park, NY
Posts: 10,511
Interstate is a great battery...one caution here, though:

The Interstate is a regular battery, and even if it never leaks ( or "spills" on high-G maneuvers)...the off-gassing near the fuse box has me worried. Get the normal battery style that has a small vent "teet"..and run tygon tubing from the nipple to "somewhere" out of the car. Use one of the three or four one-way rubber drain plugs that run left-to-right on the trunk floor just in front of the gas tank....

Wil
__________________
Wil Ferch
85 Carrera ( gone, but not forgotten )
Old 02-07-2005, 09:27 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #10 (permalink)
Registered User
 
dan79brooklyn's Avatar
 
Join Date: Nov 2004
Location: Okayama, Japan
Posts: 828
Thanks for the affirmations: I just finished installing the Intersate battery. It's bigger and heavier than the previous battery. PO had drilled a hole for the bracket to fit the smaller size battery, but it's all good, got a 85 month warranty and delivered for $79.95
started right up ! It was a tight fit there really is very little room to get jumper cables onto a 911sc. hopefully I won't need them for a loong time.
__________________
Current Driver - 2002 VW LUPO (saving for another 964)

EX - 1993 Porsche 911 Carrera 2
EX - 1979 Porsche 911SC TARGA
EX - 1976 BMW 2002
Old 02-07-2005, 05:49 PM
  Recommend this thread for the PelicanWiki    Reply With Quote #11 (permalink)
Registered User
 
Lorenfb's Avatar
 
Join Date: May 2003
Location: Manhattan Beach, CA
Posts: 2,352
"It's bigger and heavier than the previous battery."

Not good! Bigger isn't always better especially when it comes to Porsche batteries.
The "monster" batteries provide a very heavy current load on Porsche alternators,
e.g. '82 & '83 internal regulated alts. The 3.2 Carrera alts will fail when the "monster"
battery is very low and the engine is revved or driven immediately after starting.

The problem occurs mostly with internal Porsche OEM regulators which are set to 14.70 volts.
The "monster" batteries become a heavy current "sink" when their voltage exceeds 13.75,
resulting in large alt currents (>>30 - 50 amps).

Bottomline: Use a standard size battery. Its' CCAs are more than adequate with
a fully charged battery and good battery connections.
__________________
Have Fun
Loren
Systems Consulting
Automotive Electronics
www.systemsc.com

'88 911 3.2
'04 GSXR1000
'01 Ducati 996
'03 BMW BCR - Gone

Last edited by Lorenfb; 02-07-2005 at 06:18 PM..
Old 02-07-2005, 06:12 PM
  Recommend this thread for the PelicanWiki    Reply With Quote #12 (permalink)
 
Now Available for Ordering:   101 Projects For Your BMW 3 Series 1982-2000  [more info]
Registered User
 
bairdc3's Avatar
 
Join Date: May 2003
Location: Sacramento
Posts: 70
I made the aluminum plate as a mounting plate and used the optima battery. Worked out really nice.

See this thread on how to make it.

Optima battery questions
__________________
KarStuff
1980 911sc light blue metallic
2002 Toyota 4-Runner
Emmick go-kart
Old 02-07-2005, 06:27 PM
  Recommend this thread for the PelicanWiki    Reply With Quote #13 (permalink)
12 years and 17k posts...
 
azasadny's Avatar
 
Join Date: Jul 2002
Location: Wyandotte, MI (Southeast Michigan)
Posts: 17,331
Garage
I love my Optima red top!!
__________________
Art Zasadny
1974 Porsche 911 Targa "Helga" (Sold, back home in Germany)
2010 MazdaSpeed3 (daily driver)
www.ford.com
Old 02-07-2005, 06:37 PM
  Recommend this thread for the PelicanWiki    Reply With Quote #14 (permalink)
Registered User
 
Join Date: Jul 2000
Location: So. Calif.
Posts: 16,760
My 10 year old Optima just gave up. Replaced with another.

Old on left (800 CCA)
New on right (720 CCA)
Same weight: 35 lbs.



Sherwood
http://members.rennlist.org/911pcars
Old 02-08-2005, 12:30 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #15 (permalink)
Registered User
 
Join Date: Aug 2002
Location: Orchard Park, NY
Posts: 10,511
Don't ignore Loren's comments.....

A big battery....( or one that isn't charged to near-full by a stand-alone high rate charger before it's first use)...will overtax the alternator. You'd be using the car's alternator as a deep-charge unit....instead of the "topping-off" unit it is intended ( and designed) to be.

Also, don't forget the vent tubing...otherwise we talk later about ( big issue) rusted floor pans and suspension pick ups....or ( smaller issue)....electrical issues and corrosion on the too-nearby fuse box. All not to be taken lightly.

Wil
__________________
Wil Ferch
85 Carrera ( gone, but not forgotten )
Old 02-08-2005, 10:35 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #16 (permalink)
Old 02-08-2005, 10:35 AM
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 01:38 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.