Does anyone know the 12vdc CCA requirement for DD8v71 engines?

[ralexa6808]

Hi All,

Does anyone know the 12vdc CCA requirement for the DD8v71 engines?

I did the search function and read about 30 posts about batteries with hundreds of responses and only found one Hatt owner referencing that Detroit Deisel required a 1900 CCA battery for the DD8v71.

Is that correct? Can anyone confirm?

Almost no one states the CCA requirements, mostly they talk about battery cost, sizes, and or different voltages, but not CCA.

Thanks in advance,
R

 

[Glory]

The scale only goes to 1800 on the Delco chart. The 1900 entry might have been me. I did not want to be short. O could not copy the page.
The link is wattsups%27%20stef/compenents/delco-remy%20alternator/06specGuide

Page 99

 

[Boatsb]

I'd bet you need at least 2 x 8D batteries at 12 or 24 volts. The 8v53s on my boat use 1 8D And 0000 cable short enough to prevent drop. The batteries have 5 foot of cable to the starter.

Do not think 2 or 3 smaller batteries will equal the power of the big 8D. It's not simple math. Adding a second battery in parallel does not double the CCA.

They're are newer batteries that have higher burst CCA but are not as robust.

 

[ralexa6808]

Thanks Glory for the info

Here is the link of the post that referenced 1900CCA from "Traveler 45C"

https://www.samsmarine.com/forums/archive/index.php/t-3976.html?

Still hoping someone knows the answer, I need to buy starting battery's and want to get the correct ones.

Thanks,
R

 

[Boatsb]

Isn't your boat 32 volt?

 

[sixty]

If you find the CCA for 24 volt you can double it or 32 volt you can multiply it by 2.666. that shoudl get you pretty close. You can always add more than you need since more is typically better for starting batteries.

 

[ralexa6808]

Thanks Sixty but I can't find the CCA for 12 volts let alone other voltages...... It's a little frustrating to have hundreds of posting from scores of Hatt Owners and no one posted CCA or knows what CCA their battery's are rated for that they are using.

Going to a Battery Dealer tomorrow, I will ask them to identify the DD battery requirements, hopefully they won't steer me wrong. If I can get some documentation that would be useful to All on the forum I will post it so I won't be the only Hatt Owner who know what the CCA req's are for an 8v71.

 

[racclarkson@gmail.com]

Thanks Sixty but I can't find the CCA for 12 volts let alone other voltages...... It's a little frustrating to have hundreds of posting from scores of Hatt Owners and no one posted CCA or knows what CCA their battery's are rated for that they are using.Going to a Battery Dealer tomorrow, I will ask them to identify the DD battery requirements, hopefully they won't steer me wrong. If I can get some documentation that would be useful to All on the forum I will post it so I won't be the only Hatt Owner who know what the CCA req's are for an 8v71.

How would you know a bum steer if you got one? Why not call a Detroit dealer and cut out the middleman?

 

[Boatsb]

Define battery dealer?

Worst morons is a battery dealer and they know nothing about batteries.

Isn't your engine 32 volts or has it been converted?

What size cable and how long is it?

Where are you loacated and can a knowledgeable person help?

I sell lots of good batteries. I've seen some real crap from a distributor in south Florida. Private label and Walmart quality at best.

Email or PM if you would like help. I work with all kinds of batteries, chargers and inverters.

 

[ralexa6808]

Thanks Robert - Good idea...I guess I got so focused on the CCA that I shudda thought of that, but glad you did, thx.

********

Thanks for the offer Scott - currently talking to a Detroit Dealer here and will advise if it leads nowhere, thanks again.

 

[Avenger]

From the DD Field Service Data Book circa 1991:

1900 CCA Above 32° F 2500 CCA Below 32° F for 12V 8V-71 and 12V-71.

 

[ralexa6808]

Thank you very much Avenger, it's appreciated.

 

[chuckbullett@gmail.com]

From the DD Field Service Data Book circa 1991:

1900 CCA Above 32° F 2500 CCA Below 32° F for 12V 8V-71 and 12V-71.

Thanks Dave,

The amp-draw at 32V is theoretically as you state later at around 712A... but I STILL only have a 100A fuse from the respective battery bank to the starter. So I'd have to argue that the actual amp draw isn't that egregious. If I can get someone to work with me one day I'll place my Fluke Clamp Ammeter on the starter and watch it while we crank one of the "girls". Rusty of "Seven"... you up for that?