thanks

 

I imagine the specs as far as CCA are in the manual somewhere. you could even check some battery manufacturers web sights for batteries for your car , they always list the CCA,

 

For 1984-1989 911 Carreras, the Bentley manual says: "the battery load-minimum voltage test is to apply a 200 amp load for 15 seconds on your battery. If your voltage is below the listed numbers in the chart, the battery should be replaced. Do this test with a fully charged battery."

I've included the chart below:

Ambient Temperature Voltage
80F 9.6V
60F 9.5V
40F 9.3V
20F 8.9V
0F 8.5V

Additionally, the recommended battery type and rating is a 12V negative ground with 88 Ah (Ampere/hours).

 

thanks
for 200 amps, look like any cheapest batery is ok.
==========================

I just visited Autozone today and found they only have Duralast and Valuecraft. I like the smallest one but it has the smallest cranking amp too This is why I wanted to know what is the acceptable CA. I know someone said the recommanded CA is only 200. I also know Odysseys is so nice (I had one and I think it went bad) but I don't like their price.
Anyone has any opinion on the C.A.?

 

If you are buying new, get what you want. I spend more for the heavy duty models, but mine can sit out in the cold, and I want a battery that will last.

Any new battery will give you at least three years, if you don't let the charge drop in super cold conditions. LOL

 

umm.. just a silly thought. If "Any new battery will give you at least three years", then why spend money on "heavy duty models".
In the past I spent more for batery on more cylinders cars, don't really know why. I always thought stronger engine/accs needs more cranking amp, but not sure.

 

I actually have a very large battery. The larger the battery, the longer it will last. The reason for this is because every time you load the battery, it reduce its life. If you load it up 20% of its capacity when starting, that is not a big deal for the battery. A small battery, however, might load up to beyond 40%, which causes a lot of heat and stress on the battery. I would actually get a battery than can do at least 600 CCA (which is probably around 900-1000 CA).

Or, I would look into buying an Optima battery, which could last up to 7 years.

 

No, 200 CA is not for the battery, this is just for the load test. I would want to have much more than 200 for a battery...

 

You only use the battery when starting the car (or when the engine is off). I would not run the headlights, fans, or any other electrical component when the engine is off. It will only cause the battery to be used which will shorten its life. Once the car is started, the alternator is primarily used to power all accessories on the car.

 

I have a massive battery .... but I am running a tail without a front lip ...... :-) ... bu I digress.

I think my car battery has 800cca IIRC

 

Thanks guys.

Ice,
How do you fit that giant battery into our tiny spot..

 

Actually the car can fits different size batteries If you look carefully there are mount holes at different points for the bracket , I just use the bracket that is farthest along, I must admit however it is a bit of a pig to get in and out .. ( oh I have a 78 in case that is important ) really it is over kill As I need nothing that extravagant .... but I figure if I run out of gas , I can use the battery to get home

 

I have an Optima with 1000 CA and 800 CCA. It turns the engine very well. Someone asked about required amperes hours. I think the minimum is 88 AH, but with the size battery i have it is great whatever the AH. Ice, I had one of those long boat batteries in my 88 Carrera, too. It interefered with the blower motor housing for the A/C front condenser blower motor. That's why i went with the shorter Optoma battery, i think it is a size 34.

 

The monster battery is always a conversation piece ... and I don't have AC so no worries .. I kinda wanna keep it due to nostalga reason ....that and I could jump start a semi if he needs it :-)

 

thanks guys,
I finally got the Sears Interstate again. Let just hope there will be no more battery woriness for me. had enough of it.