Does anyone know where to find the factory battery specifications? or know of them?

 

Probably not what you are looking for Paully, but all the Drivers Manual has in it is 12V, 63A - clearly before battery manufacturers starting advertising huge cold cranking amps

 

better than nothing Glen,

At the moment, i have a Century battery.

54A, 90RC, 500CCA.

It cranked better than the Bosch that got replaced. but always gave me issues on hot start.

I looked at the Bosch catalogue.. found the part number listed under 944 turbo.
(S3+) 56318 - 63A, 110RC, 540CCA Which is already better than what i had. They also listed an alternative in their better series (S5)
(S5) 575.035 - 75A, 120RC, 680CCA

 

I run a big interstate, mtp-91 iirc, 700 cca.

 

According to my shop book, factory CCA was 600

 

Not sure about you guys who have front batterys. but i can only run so many sizes. The one i have now is the widest and tallest at 279mm x 175mm x 175mm

The one previously was a little smaller. I don't think my car has cranked this fast in a long time.

 

The only thing you need to say when buying a battery for the 944 at the parts store is "I need a group size 91 battery" It's just like buying battery's for your TV remote "I need double AAs"

 

Does Group 91 automatically have a central venting system (hose)?

 

Yes it does!