Scotty
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| posted on 4/7/11 at 06:26 AM |
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Battery Size for rv8
hi all
what size battery are others with rv8 engines using?
having just finished rebuilding the (slightly tuned) rover v8, i'm having problems with starting
got a new starter motor (burnt the old one out) but it seems to be struggling, looking around various forums, it seems most people are recommending
minimum 660a batteries, mine is only a 520a but was fine with the old engine (possibly shows how knackered it was!!)
if i jump start it with another battery, is seems ok
but dont want to spend lots of money on a new bigger battery if this is not really the problem
any input would be appreciated
thanks in advance
PLEASE NOTE! All comments made by this person are to be considered "Tongue in Cheek" and are not meant to be taken seriously in any way - so there!
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RazMan
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| posted on 4/7/11 at 06:54 AM |
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You don't necessarily have to go physically bigger - have you considered the Odyssey range? Very small but they pack a fiersome punch and will
start much bigger engines than your ickle RV8 
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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daviep
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| posted on 4/7/11 at 08:09 AM |
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Have you checked all the connection on the main battery cable and earths are in good condition and nice and tight?
Have a feel at all heavy cables and connections including the earths after cranking and see if anything is getting warm.
Davie
“A truly great library contains something in it to offend everyone.”
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Irony
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| posted on 4/7/11 at 08:51 AM |
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Thread
Some info here
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scudderfish
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| posted on 4/7/11 at 08:57 AM |
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Mine is rated 610 CCA and spins it over with no trouble.
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craig1410
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| posted on 4/7/11 at 12:41 PM |
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I've just a got a bog standard battery which I probably bought from Halfords about 5 years ago and it does the job just fine without even a hint
of sluggishness on cranking. I don't even need to re-charge the battery over the winter when the car is off the road - I can just jump in and
start it up in the spring. I do disconnect the battery when the car is not in use though to be fair.
The numbers on the battery are as follows:
Model: XM400
SAE: 370A
IEC: 245A
DIN: 210A
Capacity 40AHr
Hope this helps,
Craig.
[Edited on 4/7/2011 by craig1410]
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ashg
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| posted on 4/7/11 at 12:57 PM |
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sounds very typical of a bad earth to me. put a jump lead from the neg on the battery to a good bit of clean metal on the engine block and try to
start it.
Anything With Tits or Wheels Will cost you MONEY!!
Haynes Roadster (Finished)
Exocet (Finished & Sold)
New Project (Started)
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craig1410
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| posted on 4/7/11 at 01:04 PM |
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quote:
Originally posted by ashg
sounds very typical of a bad earth to me. put a jump lead from the neg on the battery to a good bit of clean metal on the engine block and try to
start it.
I suppose that depends on whether, when he was using another battery to boost the onboard battery, he was attaching the negative lead from battery to
battery or from booster battery to chassis (the correct way btw).
If it were me, I'd take off all the connections and clean them all thoroughly. A brass brush is good for cleaning the battery terminals or some
emery cloth. Make sure you clean the battery connectors too and ensure that the crimps are secure and clean. Then check the starter main battery
terminal as well and clean it thoroughly. Do the same with the engine to chassis and chassis to battery earth braids and make sure they are beefy
enough (same with the main battery cable - it needs to be big).
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Scotty
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| posted on 5/7/11 at 06:42 AM |
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hi
thanks for the info, will def try that
did try cleaning all cr@p off connections first
need to investigate a bit more
thanks
PLEASE NOTE! All comments made by this person are to be considered "Tongue in Cheek" and are not meant to be taken seriously in any way - so there!
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britishtrident
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| posted on 6/7/11 at 09:30 AM |
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As a rough guide to standard battery type numbers.
Type 075 --- typical used 1.8 to 3 litre petrol tin top or 1.8 diesel --- 510 to 560 cca depending on grade & manufacturer.
Type 096 ---- typical use 2 to 4 litre petrol tin top or 1.8 to 3 litre diesel --- 600 to 660 cca depending on grade &
manufacturer.
Tanya batteries are a very good ( both price and delivery) online supplier
Tanya link
However the problem sounds to me you have too much static/cranking speed ignition advance ---try retarding the ignition 5 to 10 degrees before
dumping the battery.
As it may be what you really need to is sort out the ignition advance curve.
[Edited on 6/7/11 by britishtrident]
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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