I’m replacing the conventional lead-acid battery currently in my 1979 911 SC. The car is a European coupe with a bit of a hot rod 3.0 with Webers. I have questions, but I do also hope that having this information in one place is helpful.
Odyssey PC925T - From reading other threads, the PC925 and PC680 are popular options. The PC925 has higher CCA and nominal capacity at the cost of higher weight. I linked the “T” model because it comes with the SAE terminals, which I believe to be correct for the 911 SC.
Group 48/H6 AGM Battery - There are many brands that make this size/specification battery. Interstate is a popular choice; the model numbers are H6 (MTP91) and H8 (MTP93). H6 is the smaller of the two, but either will fit the original battery location in a 911 SC.
I believe Odyssey makes a Group 48/H6 battery; it is the
48-720
I believe Odyssey makes a Group 49/H8 battery; it is the
49-950
Here are my questions:
- Can anyone confirm the terminals on the PC925T are correct for a 911 SC? Is that the correct model for the 911 SC? There are multiple different PC925 models.
- For the smaller PC680 and PC925 batteries, what are people using to securely mount them? Odyssey sells generic application mounting kits, Rennline sells one, and I’ve seen plenty of custom mounts. I don’t mind making my own, but the kits may have some nice features.
- Has anyone used an Odyssey 48-720 in this application?
- I leave my cars on battery tenders over the winter. I use Battery Tender Plus tenders. It's unclear to me if I need to a different tender for AGM batteries; any suggestions?
Thanks!
