RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 07-08-2017, 07:08 PM   #1
Senior Member
 
Join Date: Oct 2016
Posts: 101
Diesel pusher start battery???

I have to replace a bunch of battery's on my 09 DP with 8.3 Cummins. Now I have 2 start battery's and 4 house battery's. I want to put 8 house battery's in the tray where the start and house batterys were and I measured and they will fit and move the start battery and make up a battery tray on the frame. The start battery will now be 1 battery and I need to know what cold cranking amps are needed to start a diesel and if there is a common size single battery's used for this application? Thanks, Jim
Superbee Jim is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 07-08-2017, 07:29 PM   #2
Senior Member
 
jacwjames's Avatar
 
Monaco Owners Club
Join Date: Jun 2014
Posts: 7,656
I believe when I had to replace my starting battery for my 350 ISC it was 1400 CCA, an 8d size. This is based on memory & I'm getting old.
__________________
Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
jacwjames is offline   Reply With Quote
Old 07-08-2017, 08:20 PM   #3
Senior Member
 
mackwrench's Avatar
 
American Coach Owners Club
Join Date: Apr 2016
Location: North Florida
Posts: 1,897
Not sure why you'd want to reduce cca to engine starter, but it's your dollars....
Group 31 battery, min 1300 cca,

Just my $.02 but yours is a 2009 engine, lots of electronics, emissions controls and engine actuators and intake heater just to run off one battery...... good luck with it.

Hell even today's diesel pickups have more batteries than that.
__________________
1999 American Eagle
ASE med/heavy certified technician
ASE advanced diesel certified
mackwrench is offline   Reply With Quote
Old 07-08-2017, 08:37 PM   #4
Senior Member
 
Mr_D's Avatar
 
Country Coach Owners Club
Winnebago Owners Club
Solo Rvers Club
iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,083
My rig has 4 925 CCA starting batteries and even with that is sometimes reluctant to turn over and the batteries are just over a year old now.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '14 Jeep JKU Dragon Edition
Mr_D is offline   Reply With Quote
Old 07-08-2017, 09:17 PM   #5
Senior Member
 
Canefin's Avatar
 
Join Date: May 2017
Location: Boynton Beach FL
Posts: 155
So Mr. D.... If your batteries are hard to start at times do you have the starter batteries on a charger when you store it or when hooked into shore power?
Canefin is offline   Reply With Quote
Old 07-08-2017, 10:16 PM   #6
"Formerly Diplomat Don"
 
Dutch Star Don's Avatar
 
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 16,311
"Superbee Jim"....I don't know what your battery tray looks like on your coach, but don't forget to look up! On my previous coach, the battery bay was tall enough to add a the starting batteries to a rack near the top, still giving me room to service the batteries on the floor.

I'm thinking a single battery big enough to start your coach will take up about the same room as the two batteries you have now.
__________________
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
Dutch Star Don is offline   Reply With Quote
Old 07-08-2017, 10:32 PM   #7
Community Moderator
 
barmcd's Avatar


 
Monaco Owners Club
Texas Boomers Club
Join Date: Nov 2015
Location: Central Texas
Posts: 12,690
My coach has one 1400 CCA battery.
__________________
Dennis and Katherine
2000 Monaco Dynasty
barmcd is offline   Reply With Quote
Old 07-09-2017, 07:43 AM   #8
Senior Member
 
mackwrench's Avatar
 
American Coach Owners Club
Join Date: Apr 2016
Location: North Florida
Posts: 1,897
Quote:
Originally Posted by barmcd View Post
My coach has one 1400 CCA battery.
No disrespect, but there's a lot of electrical differences between coach of your vintage and the OP 2009.
__________________
1999 American Eagle
ASE med/heavy certified technician
ASE advanced diesel certified
mackwrench is offline   Reply With Quote
Old 07-09-2017, 10:34 AM   #9
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 23,306
A typical DP with 8.3L or 8.9L engine has a pair of 900-1000 CCA (each) 12v batteries, usually the Group 31 physical size. If only a single battery, it is likely the larger 4D or 8D physical case size and 1300+ CCA. 4D's are usually in the 1100-1300 CCA range and 8D's are greater.

The amount of CCA you need depends on the usage. If your chassis batteries are always fully charged and never asked to crank at temperatures much below 40 degrees, you can probably get by with 1000 or so CCA, but otherwise I would want to have greater capacity. Battery cranking amps decrease substantially with temperature, so the MCA (not extreme cold) rating is more relevant for many Rv owners.

I would not be comfortable with a single Group 31 12v battery to crank an 8.3l diesel. It's only going to be sufficient when in excellent condition and fully charged, and then only in warmer weather. However, you can always use the Aux (Emergency) start switch to bring the house batteries online for engine start (assuming the house batteries are discharged at the time).
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is offline   Reply With Quote
Old 07-09-2017, 10:38 AM   #10
Senior Member
 
Ernie.'s Avatar
 
Join Date: Feb 2009
Location: Smithton, IL
Posts: 2,945
Quote:
Originally Posted by Canefin View Post
So Mr. D.... If your batteries are hard to start at times do you have the starter batteries on a charger when you store it or when hooked into shore power?
I have a switch on the dash that allows me to use the house batteries to "boost" the starting batteries.
__________________
Ernie and Shirley with Molly and Sophie our Brittanys
2019 Dutch Star 4363 Freightliner
2016 Ford Explorer Platinum
FMCA #F456868 NKK #23023
Ernie. is offline   Reply With Quote
Old 07-09-2017, 11:32 AM   #11
Senior Member
 
Join Date: Oct 2016
Posts: 101
I just looked at my battery's and I have 2 group 31s that have a CCA of 1150 each. I looked in my Cummins manual and they recomend 1300 CCA for temps no colder than 40* and 1875 CCA for temps lower. The 8D battery's are about 1400 CCA, but looking at its size, I can fit 2- 31 series in about the same space and they are cheaper than 1 of the 8Ds. We boondock a lot and I would like to have the 8 six volt battery's for more reserve.
Superbee Jim is offline   Reply With Quote
Reply

Tags
battery, diesel



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
diesel pusher vs diesel puller pops2 Class A Motorhome Discussions 29 06-25-2013 02:46 PM
Safari Diesel Pusher - dead battery Lori82 MH-General Discussions & Problems 6 11-02-2011 09:48 PM
Couple of Used Diesel Pusher Questions Bill Moss Class A Motorhome Discussions 12 02-24-2009 11:39 AM
1980 Foretravel Diesel Pusher / 3208 Caterpillar Doggie Vintage RV's 3 08-12-2006 06:24 PM


All times are GMT -6. The time now is 11:54 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.