Batteries for a 71 911T

[30westrob]

I understand, Advance Auto Parts, has a conventional lead acid battery, size T-4 that fits well. Rob

[dummkopf]

Do those fit well? Miata size?

I have been looking at AGM Miata batteries... What CCA does the old 911 really need?

I have an oversize Optima that works... I will never have a lead acid battery in my car again!

[Arne]

I have a pair of Miata batteries in my '72T. They work perfectly, can go weeks and weeks without the tender on them (I forget sometimes) and still crank great.

They don't fit perfectly, you will need to build some blocks or shims to hold them in place. And they are a slight touch taller, so you will need to carefully insulate the positive terminals.

[dummkopf]

I have a pair of Miata batteries in my '72T. They work perfectly, can go weeks and weeks without the tender on them (I forget sometimes) and still crank great.

They don't fit perfectly, you will need to build some blocks or shims to hold them in place. And they are a slight touch taller, so you will need to carefully insulate the positive terminals.

Thank you!!!

[dogLeg]

+1 on Miata for my 70T, 2 of em & no issues at all after about 9 months. Would do it again in a sec.

I have a pair of Miata batteries in my '72T. They work perfectly, can go weeks and weeks without the tender on them (I forget sometimes) and still crank great.

They don't fit perfectly, you will need to build some blocks or shims to hold them in place. And they are a slight touch taller, so you will need to carefully insulate the positive terminals.

[lopena]

Here’s one of the two Miata batteries in my ‘69 (dressed up with black semi-gloss and a sticker):

Alan
N.J.

[LiveFromNY]

Unfortunately, that Bosch battery does not appear to be available in the US.

I consider it fortunate. That thing is ugly.