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Topic: 2001 U270 Start Batteries- CCA (Read 589 times) previous topic - next topic

2001 U270 Start Batteries- CCA

Hello.

Does anyone know the official recommended "Cold Cranking Amps" for the 2001 U270, Cummins 8.3 350hp?

I am ordering new batteries and just want to verify.  I did call Cummins with my engine number and they said to ask the chassis builder.

I am considering (3) Duracell 34/78 from Sam's.  AGM's.

Thank you.

-FT
2001 U270- 34'
with Aqua-hot
Travel Safely
Have Fun!!

Re: 2001 U270 Start Batteries- CCA

Reply #1 –
We have a Detroit but as I remember, your 8.3 requires 1500 CCA. Three 34 series will be plenty with extra left over for cold winter starts.  Our Detroit needs a minimum of 1800 CCA and came with three 24 series that started it fine in winter. I went with three 31 series by Duralast with 2850 CCA ten years later. Never hurts to have more than is required, especially when the batteries age.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: 2001 U270 Start Batteries- CCA

Reply #2 –
From the Cummins specifications for the marine industry the requirement is 1250 cca.

Since your two 34/78 AGMs will give you 1500cca, you will be fine.

I've used two Exide 34/78 AGMs for three years, they are fine, turning the engine over quickly and starting  quickly.
97 U295 40, Build #5040, 6C8.3 325 HP
Oregon Continuous Traveler
Samsung Residential #RF20HFENBSR,
Xantrex SW2012, (3)AGM8D Hse, (2)AGM Grp24 Eng, Victron BMV-712, 1800w Solar 4 LG & 2 Sunpower
Extreme Full Body Pt w/hdlmps, new furn/floor, 4 down Lexus 2004 GX470 AWD curb weight 4,740 lbs
Prev: 1990 Barth, 10L 300 2 yrs; 91&92 Monaco Signature, 10 yrs, 10L C 300 &  6C8.3 300; 1997 ForeT 6C8.3 325 since May 2017.  Employed by Guaranty RV 14+ yrs.  Former VW New Car Dlr/Service Dlr, Sales Mgr, Rv Sales, and Service Adviser from 1968-2017
"Don't criticize what you can't understand" Bob Dylan

Re: 2001 U270 Start Batteries- CCA

Reply #3 –
Hello Jack and Pierce.

Thank you both. 

The previous owner had (3) Optima Yellow-top installed.  I did not think I needed to match that.  Sam's pricing seems pretty good.

I always appreciate the help I get here.  Take care.

-FT
2001 U270- 34'
with Aqua-hot
Travel Safely
Have Fun!!

Re: 2001 U270 Start Batteries- CCA

Reply #4 –
At what point if ever, does a single 8D come into use.

Does having extra power in start batteries. Give any usable effect when boost is selected.

Start batteries being start batteries should not be deep cycle as the power used in starting is a jolt draw. Not a steady pull of house usage.

Are there any lithium start batteries.
1999 U270 40 #5518
USN. USPS.

Re: 2001 U270 Start Batteries- CCA

Reply #5 –
The spiral wound optimas were put in the coach for specific reasons.

Better able to dissipate heat(engine) and  vibration.  Off road race cars all have optimas.  Plus they last.
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: 2001 U270 Start Batteries- CCA

Reply #6 –
Quote from: Texhub –
At what point if ever, does a single 8D come into use.
Does having extra power in start batteries. Give any usable effect when boost is selected.
I don't believe in using the boost switch in normal operation. Only for emergencies. Our diesel car, diesel tractor and old SOB with a 7.3 Ford/IH never had boost switches. Do any of your cars have a boost switch?

One 8D should start a 8.3 Cummins OK. Our FD Detroits were 9 liter and we had to run two 8Ds in parallel to get reliable starting.

Boost switches are only a crutch to make up for poor design in the starting system. Builder skimped on cable sizes, etc.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: 2001 U270 Start Batteries- CCA

Reply #7 –
I have 2 24 group interstate flooded cells to start my C8.3. They are marginal. I'm thinking of going to 3 batts in parallel since it looks like I have room. I did a deep cleaning of all connections this winter. Before summer going to charge individual batts, load test to see if they actually put out the 800 CCA printed on the case. My engine not exactly apples to apples.
1998 36 foot U270 Build No. 5328 WTFE, 900 watts solar, Victron controller, B2B, bat monitor, 600 AMPH lithium with 2018 Chevy Colorado toad, SKP #110239, Motorcade #17781, 2021 Escape 17B for when Coach is broken down and campsites are too small, retired and full-timer since Dec. 2020. Part of RV family since 1963.
 

Re: 2001 U270 Start Batteries- CCA

Reply #8 –
Thanks again to all for the help.

(3) 34/78 Duracell Batteries installed.  All good.

-FT
2001 U270- 34'
with Aqua-hot
Travel Safely
Have Fun!!