84 911 Turbo replacement battery
10-03-2010 | 09:33 AM
#2
Racer
Joined: Dec 2008
Posts: 453
Likes: 0
If your car is like my 89, it can accept 2 different battery lengths. I had the longer one in my car, and changed to the shorter for a bit of weight savings.
Interstate brand is pretty good and can be commonly found. Odyssey is highly regarded but harder to find locally. You can find them on their website or on Amazon.com. Most folks that go to Odyssey don't buy the standard size, they by a smaller AGM type battery for even more weight savings, but this requires custom brackets for installation.
Interstate brand is pretty good and can be commonly found. Odyssey is highly regarded but harder to find locally. You can find them on their website or on Amazon.com. Most folks that go to Odyssey don't buy the standard size, they by a smaller AGM type battery for even more weight savings, but this requires custom brackets for installation.
10-03-2010 | 10:55 AM
#4
Pro
Joined: Jun 2006
Posts: 633
Likes: 0
This is a DEKA Manufactured by East Penn
DEKA Group 91 is roughly 3" shorter and 10 pounds lighter than 14 inch length Group 93 Interstate, and mounts down to the option mounting point using the standard 911 lock down clip and socket head cap screw.
Description and size range specifications here -- Be sure to measure first.
http://www.dekabatteries.com/assets/base/0379.pdf
SPECIFICATIONS:
DEKA 91 Group Number
66LB EN Size
T6 DIN Size
691MF Part No. Wet
700 CCA @ 0 degrees F
100 Res Cap
50 20 A H Rate
875 REF Cap
70 Mo. Suggested Warranty
36-1⁄2 pounds
11" length (278 mm)
6-7⁄8" width (175 mm)
6-7⁄8" height (175 mm)
Note 17: includes handle,
Note 22: flush manifold vented cover
DEKA Group 91 is roughly 3" shorter and 10 pounds lighter than 14 inch length Group 93 Interstate, and mounts down to the option mounting point using the standard 911 lock down clip and socket head cap screw.
Description and size range specifications here -- Be sure to measure first.
http://www.dekabatteries.com/assets/base/0379.pdf
SPECIFICATIONS:
DEKA 91 Group Number
66LB EN Size
T6 DIN Size
691MF Part No. Wet
700 CCA @ 0 degrees F
100 Res Cap
50 20 A H Rate
875 REF Cap
70 Mo. Suggested Warranty
36-1⁄2 pounds
11" length (278 mm)
6-7⁄8" width (175 mm)
6-7⁄8" height (175 mm)
Note 17: includes handle,
Note 22: flush manifold vented cover
10-03-2010 | 11:30 AM
#5
Burning Brakes
Joined: Feb 2004
Posts: 795
Likes: 3
From: Shadow of Monticello
Offhand I can't remember the brand (starts with a V), but the enormous OEM battery in my M5 last 7.5 years - I was so impressed I replaced it with OEM, which wasn't badly priced with a CCA discount. When the interstate in my 911 expires, I will look around for the same brand that is in the BMW.
I had some Optima's in my race cars, and I did not see much advantage in them over normal batteries. They lasted about as long, and held a charge about as long, especially in a total loss set up.
I had some Optima's in my race cars, and I did not see much advantage in them over normal batteries. They lasted about as long, and held a charge about as long, especially in a total loss set up.
