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Neil
super slot
Joined: November 28th, 2008, 11:14 pm
Posts: 8797
Location: Cornwall, UK
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 Re: Battery question ben wrote: What's a YSH  Yellow Shit Heap!  
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| March 29th, 2011, 8:41 pm |
 
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Luke
Firing on two.
Joined: December 9th, 2008, 7:50 pm
Posts: 662
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Re: Battery question 602 wrote: Not sure that's possible, is it? I seem to think my chemistry lessons say no... I would have thought it might have got a bit exciting when he connected the battery charger (unless it was fused, which I imagine it was) - I know what would happen if you connected two batteries in series..! It is probably possible to connect a battery in a car back to front if you forced the negative terminal on hard enough...
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| March 29th, 2011, 8:55 pm |
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ben
Firing on two.
Joined: November 28th, 2009, 9:48 pm
Posts: 636
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Re: Battery question Neil wrote: ben wrote: What's a YSH Yellow Shit Heap! Like 
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| March 29th, 2011, 9:56 pm |
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ken
Agony Aunt - You have a car problem? Speak to Ken
Joined: March 6th, 2009, 1:40 am
Posts: 3675
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Re: Battery question Adrian, sounds OK in theory, but in practice a 2CV starter pulls 150 amps on 'normal' starting, rising to 280 amps at stall. Found some guff in a Toyota service document which mentions 130 amps for their starter, so perhaps it's to do with the gearing 'twixt starter and engine. Some of the racers have come unstuck during the 24 hour by using a motorcycle battery, which is fine for a 10 lap sprint race but won't have enough in reserve if the racer is reluctant to start after a pit stop...  ken toomany2cvs wrote: Although, given how small a 2cv starter & engine are, I'd expect anything but the weediest of small-motorbike batteries to cope quite happily. It's not as if it's a chuffin' gurt big diesel 4x4 or truck...
(C)CA = (Cold) Cranking Amps = How many amps the battery can deliver at once. Going back to that water tank analogy, how big the outlet hole is. The starter will only "take" as much as it "needs".
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| March 29th, 2011, 10:04 pm |
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Jonathan
Firing on two.
Joined: January 1st, 2009, 7:37 pm
Posts: 4708
Location: Disunited Kingdom
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Re: Battery question "Reverse the polarity!!"
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1988 built (1989 F-registered) Citroën 2CV-Six
2013 (63-Plate) VW Golf SE 1.4TSI BMT DSG7
1932 Morris Minor Open Two-Seater (The £100 car).
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| March 29th, 2011, 10:12 pm |
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toomany2cvs
Firing on two.
Joined: December 26th, 2008, 9:40 pm
Posts: 3332
Location: Surrounded by 2cvs...
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Re: Battery question ken wrote: so perhaps it's to do with the gearing 'twixt starter and engine. There's definitely an element of that - back when I had my CX GTi, the starter died. The replacement was a reduction-geared one, and - by crikey, it flew. It totally removed that characteristic CX churn-churn-churn sound, though...
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Zookeeper of a miscellany of motorised silliness - from 0.75bhp to 9ft tall - now living life on the road in an old VW.
http://WhereverTheRoadGoes.com
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| March 29th, 2011, 10:12 pm |
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Squeezebox
Firing on two.
Joined: February 8th, 2009, 11:39 pm
Posts: 813
Location: East Sussex
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Re: Battery question Stick a tractor battery on it like James 
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| March 29th, 2011, 10:27 pm |
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ken
Agony Aunt - You have a car problem? Speak to Ken
Joined: March 6th, 2009, 1:40 am
Posts: 3675
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Re: Battery question
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| March 29th, 2011, 10:41 pm |
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Squeezebox
Firing on two.
Joined: February 8th, 2009, 11:39 pm
Posts: 813
Location: East Sussex
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Re: Battery question "Plutonic safety tip".......
I like it !!
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| March 29th, 2011, 10:56 pm |
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Devils Advocate
Firing on two.
Joined: July 26th, 2009, 3:36 pm
Posts: 1019
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Re: Battery question Reversing polarity was a new one to me, too. In fact I left my neighb saying the garage were trying to pull a fast one, and I'd find out the 'truth'...  After a bit of investigation, I gave him the bad news  . With most batteries - especially 'dry' cells - the voltage is generated by using two different materials for the electrodes. In a wet cell like a car battery, however, both electrodes are lead (or whatever they use these days - is it still lead?) What then happens is that one electrode becomes coated with an oxide (or similar) due to the charging process, and this is what gives the battery its leccy-producing potential - the electrodes are now effectively different . My neighb's battery was COMPLETELY flat, or else it would - as peeps suggest above - have sparked alarmingly when connected to the charger t'wrong way round - or would at least have blown/tripped a fuse. But a dead-flat battery did none of this. Ah well, you learn sommat new every day.
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| March 30th, 2011, 12:36 pm |
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