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  #1  
Old March 12th, 2010, 05:35 PM
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dual optima on tdi

I am putting dual batteries on my 200 tdi

shall I do

red/yellow
yellow/yellow ( 34/78
yellow/blue ( 34/78 - 34M )
blue/blue ( 34M )

yeah yeah yeah I know, do the search thingy.. but nowhere I was able to find that answer *LOL*

Thanks for the help
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  #2  
Old March 12th, 2010, 05:50 PM
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Red/red

but that is just me.
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  #3  
Old March 12th, 2010, 06:12 PM
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I'm running red/red
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  #4  
Old March 12th, 2010, 06:28 PM
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I'm red/red too.

whisper (come get your trailer)
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  #5  
Old March 12th, 2010, 06:38 PM
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come install the cage *LOL*



I will .. I will ..maybe next friday after HH i'll take it


Quote:
Originally Posted by Wolf Fabrication View Post
I'm red/red too.

whisper (come get your trailer)
------ Follow up post added March 12th, 2010 06:48 PM ------

Seriously, why the Red/Red.. I mean the Red and I assume we are talking Group 34, is a Starting Battery not deep Cycle.

I was leanning towards Blue 34M, same dimmenssion CCA, and less weight , plus they are Deep Cycle.

On my DII I used to run Dual Yeallows, on the D90 Yellow/Blue.. but was wondering if for the Tdi , something different was in line
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Old March 12th, 2010, 08:50 PM
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I just like matching batteries, no reason in particular.

I MAY, MAY, drag the trailer to HH.
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  #7  
Old March 12th, 2010, 10:21 PM
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Depends what you are doing. If one battery is going to get drained such as winching or a fridge, it should be a deep cycle (Yellow or blue). Red is for starting and normal non draining use only.
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  #8  
Old March 12th, 2010, 10:41 PM
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Not to throw a fly in the ointment but i was doing red/yellow and now have a collection of spent red yellow batteries. Very happy with dual Odyssey 1500s.
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  #9  
Old March 13th, 2010, 12:42 AM
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Well I have a hook up with Optima so I pay next to nothing and if I were to have an issue, would be replaced at once, so I really want to stick with the Optimas

Now for the usage, yeah ..one will carry the winch and fridge..

but why not use another DC for cranking, I did on my D90.

So I guess I should reprase the question.

Is there any particualer requirement for using dual batteries on a Tdi that is differendt than the V8 petro?
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Old March 13th, 2010, 02:14 AM
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No.

The other think as mentioned, if they are in parallel without and isolator, they should be the same battery in the same condition.
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  #11  
Old March 13th, 2010, 02:24 AM
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can we fit dual odyssey 2150's ?

looking at this with the hellroaring 75300a (any negetives here as well)

as usual total overkill stuff in my kit.
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  #12  
Old March 13th, 2010, 04:17 AM
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I have one of these. http://www.powerstream.com/battery-isolator.htm A lot cheaper than the hellroaring and does as good of a job.
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  #13  
Old March 13th, 2010, 08:20 AM
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Gustavo, are you running stock alternator or something else ?
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  #14  
Old March 13th, 2010, 09:32 AM
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Julien , Stock Alternator.

John, Yes it will be with isolation and mgmnt kit
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  #15  
Old March 13th, 2010, 05:48 PM
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If you are going to run a battery manager/isolator, I would run a Red for starting and a Yellow for the fridge and winch.
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  #16  
Old March 13th, 2010, 05:53 PM
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Scott,

Thanks

Now the part that puzzles me .. If you look at the Specs on a Red Top and a Blue Top the CCA is same, and the Blue has a longer life discharging in case of no alternator , so what is the need of a Red Top with Dual Batteries?

BTW, seen tons of people running Red/Yellow and Red / Blue
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  #17  
Old March 13th, 2010, 05:56 PM
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I think that this is a prime question for OptimaJim... A new member on this board.
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  #18  
Old March 13th, 2010, 06:08 PM
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If you look at the Specs on a Red Top and a Blue Top the CCA is same, and the Blue has a longer life discharging in case of no alternator , so what is the need of a Red Top with Dual Batteries?

G, forget about CCA. That number means absolutely zip. Look at battery weight and reserve capacity. Reds are like sprinters, quick output for short bursts, while the blues are like marathoners, in it for long duration.

If you get these things for free, then you should have a dual red for your start bank and dual blues for your house bank. If the TDi needs to be bled, you may flatten a single in no time leaving you in hot water. Doubling the battery bank not only increases the reserve it more than doubles the life expectancy. Finding room for them, priceless.

Install a VSR for charging the blues, and use marine grade wire and terminals all around. Recommend at least 2 or 0 G battery cabling. Run your winches and fridge off the blues.

The alternator should be able to handle the loads, but that fridge is gonna be the biggest draw. With the engine off and the fridge drawing down the batteries, you may not get a full overnight before the house bank goes flat, especially if you are running lights and stereo, and you'll have to start the engine to recharge them.

If you need a hand with installation, let me know. I have all the stuff for making cables and doing wiring. Boats, y'know.
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  #19  
Old March 13th, 2010, 06:18 PM
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Quote:
Originally Posted by Rugbier View Post
so what is the need of a Red Top with Dual Batteries?

BTW, seen tons of people running Red/Yellow and Red / Blue
The red is just cheaper, that is the only reason.
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  #20  
Old March 13th, 2010, 06:30 PM
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Lots of advice here about battery bank isolation. I have done lots of research on this and believe me the best one you can buy is the Yandina. Whatever you do, do not use a battery "isolator" or charge splitter.
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