Fitting single 12V battery size instead of 2 in 69T ?

[murray]

Having got the 2 battery boxes in my 69T I prefer to fit a larger single battery instead. Does anyone have the dimensions of one that is easily obtainable and if it proves to be a useable mod and is there anything else to think about ?

I understand that there will be those who might remind me of the weight distribution but I am happy to live with that ?

[Cortina]

... and why would you want a larger one ???


(follow the ASSUME rule)

[murray]

One larger one will provide a similar output to the 2 smaller ones and will be cost effective.

[Lightweight_911]

.
Modern batteries in general are higher-rated than they were when the cars were new so no need for a physically larger battery.

I always went one stage further & fitted a lightweight Odyssey PC680 battery - relocated to the smuggler's box.

[Cortina]

I just (long time ago) fitted one standard battery , in it's usual place - the cranking capacity was just fine. The word "output" does not really mean anything to me . Providing everything is working correctly , you don't need massive AH capacity. You need a specific CCA level on a cold winters morning , etc etc.
(For rally 928) , I am considering replacing a relatively small , but still heavy (14kg from memory) competition battery (redtop ?) from many years ago with a small - sub 4kg (yes - a 10Kg saving !!!) Lithium jobbie ................... big budget , but for me , weight is king.

[murray]

Thank you Lightweight_911 and Cortina, I will check out your recommendations, thanks for your input.

[jwhillracer]

I have always run our 911 hillclimb car with just one battery, and have not had any problems with starting either the 2.7 RS or 3.2 MFI engines. I changed the standard battery (12kg+?) for a lithium one 4 years ago, and it still starts perfectly. The weight saving is considerable, the present battery only weighs 1150 grams!

JW