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  #1  
Old January 5th, 2014, 10:15 AM
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most Cold weather cranking amps

what is the highest cca "Cold weather cranking amps" battery available that will fit in the Defender seat box ? ( maybe one that can survive being drawn down to dead a few times ;-) I have killed an optima red top ( although it was 6 years old , and the similar size Autocraft Gold 800cca (at 0) did not last 3 months. ( although it has been from -5 to -20 the last few days... just wont turn over my hard starting V8 110
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  #2  
Old January 5th, 2014, 10:21 AM
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Chris: you're starting to sound like candidate for a double battery set up!
Or possibly a battery and engine block heater!
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A friend of mine runs a land rover / range rover specialty repair shop. Based on his experience, they are capable of stopping anywhere, anytime, at any cost.

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Old January 5th, 2014, 10:22 AM
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Go double battery and consider a block heater and battery blanket.
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  #4  
Old January 5th, 2014, 10:42 AM
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Or go cheap, an environmentally devastating 60 watt incandescent bulb.
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  #5  
Old January 5th, 2014, 10:43 AM
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CCA is not a good measure of battery performance.
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  #6  
Old January 5th, 2014, 10:51 AM
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Quote:
Originally Posted by javelinadave View Post
Or go cheap, an environmentally devastating 60 watt incandescent bulb.
very true! Also a good idea to insulate the battery box. I intend to.
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  #7  
Old January 5th, 2014, 10:52 AM
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so when you are looking for a old rover to start when its -20 degrees what do you measure a battery's most effective ability to start it ?
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  #8  
Old January 5th, 2014, 10:58 AM
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Quote:
Originally Posted by Chris Velardi View Post
so when you are looking for a old rover to start when its -20 degrees what do you measure a battery's most effective ability to start it ?
-20 outside, a volt meter.
Bring your own warm battery to attempt a start.
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  #9  
Old January 5th, 2014, 11:07 AM
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I run odyssey 2150-- it is great in cold. It's got plenty of reserve and power for single battery.
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  #10  
Old January 5th, 2014, 11:11 AM
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In the real low temps I've had friends pull their battery's and bring them in for the night. Keeping them nice and warm by the wood stove does amazing things.
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  #11  
Old January 5th, 2014, 11:19 AM
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Has anyone ever tried dropping a couple handwarmers into the battery box overnight?
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  #12  
Old January 5th, 2014, 12:01 PM
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An 8D AGM is going to be the biggest baddest thing you can buy. Not sure if that will fit in the battery box of your truck, however.

I personally think the best long term solution in really cold areas is an actual battery blanket. At very low temps, the cold cranking amps is one thing, the discharge rate of the battery while cold is another. The battery blanket keeps the battery warm via 120VAC and insulates the battery once temp is reached.

One issue that others haven't yet mentioned is that the battery is likely too cold while charging, which leads to other issues like drastically shortened lifetime and insufficient charge after a drive. You might buy a battery with 800CCA, but if it only gets charged halfway due to the temp and limitations of your alternator, then it has less than 400CCA to start (if you're lucky).

The lowest buck option is just keeping the battery indoors.
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  #13  
Old January 5th, 2014, 12:15 PM
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Quote:
Originally Posted by Chris Velardi View Post
so when you are looking for a old rover to start when its -20 degrees what do you measure a battery's most effective ability to start it ?
Weigh it. More lead equals more oomph.
Buy Deka, odyssey, Trojan.
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  #14  
Old January 5th, 2014, 12:55 PM
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On this subject, if you are using an engine oil/sump heater will you not need to wait for glow plugs for cold starts? And same for the battery, would the stronger battery still make it easier to start without waiting for plugs to warm up?
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  #15  
Old January 5th, 2014, 01:10 PM
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How old is the battery? Make sure your cables are in good shape and the grounds are in good shape too.

A rover V8 is relatively easy to turn over. And the stock sized battery is way oversized for the application.
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  #16  
Old January 5th, 2014, 01:28 PM
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Quote:
Originally Posted by evilfij View Post
A rover V8 is relatively easy to turn over. And the stock sized battery is way oversized for the application.
That's because the battery box was designed when motor cars used batteries made of wood and lemon juice
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  #17  
Old January 5th, 2014, 01:52 PM
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my v8 110 takes a long time to start even in warm temps, so when the temps drop the battery even attached to a charger barely turns it over , new battery is 3 months old . God I miss my heated garage
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Old January 5th, 2014, 02:10 PM
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Quote:
Originally Posted by Chris Velardi View Post
my v8 110 takes a long time to start even in warm temps, so when the temps drop the battery even attached to a charger barely turns it over , new battery is 3 months old . God I miss my heated garage
that doesn't sound right at all. something is wrong with your system electrically. maybe your block ground or corroded starter cable.
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  #19  
Old January 5th, 2014, 02:20 PM
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I'm a little confused. Are you saying that your motor is hard to start because it takes a lot of cranking to get it to start? Or are you saying it won't crank at all because the battery is not strong enough?
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  #20  
Old January 5th, 2014, 02:32 PM
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In warmer weather it cranks a long time before it catches and fires up now with the deep cold it barely turns at all...
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