jrrsparky
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| posted on 19/8/11 at 09:08 AM |
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Does size matter (batteries)
What size battery have you guys used for a BEC (R1 engine) with electric reverse, to stop the engine cutting out and the reversing light dimming.
[Edited on 20/8/11 by jrrsparky]
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britishtrident
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| posted on 19/8/11 at 09:43 AM |
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Have you considered using a separate battery and a split charge relay ?
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tomgregory2000
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| posted on 19/8/11 at 10:01 AM |
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Why fit a second battery?? I see no point as you will be adding more weight and have to find a place to put it and then the wires etc etc Just fit a
bigger main battery.
What capacity(sp) battery have you fitted at the moment?
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Mr Whippy
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| posted on 19/8/11 at 11:10 AM |
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engines don't need much current to keep running, neglable compared to a starter motor and if you fit some super bright LED's as reverse
lights that could help too
Fame is when your old car is plastered all over the internet
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britishtrident
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| posted on 19/8/11 at 11:13 AM |
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If you put a heavy load on a battery the voltage across the battery terminals drops due to the internal resistance. When a starter is doing the job
it was designed to do ie starting an engine iIn typical cold conditions even with a good fully charged battery the terminal voltage will drop to
between 9 and 10.5 volts. If the battery has a dodgy cell or undersized or is low on charge the available voltage will be anything down to 6
volts.
[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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mark chandler
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| posted on 19/8/11 at 01:32 PM |
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If you stick a car battery on a bike engine you risk frying the alternator !
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britishtrident
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| posted on 19/8/11 at 03:02 PM |
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Burglar alarm battery should be enough to keep the engine running, small (ie the little japanese) car battery for reverse and starting.
[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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britishtrident
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| posted on 19/8/11 at 03:08 PM |
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quote:
Originally posted by mark chandler
If you stick a car battery on a bike engine you risk frying the alternator !
A lot less than the aternator trying to pump less than 9 v up to 13.4-14.7v when the reverse motor is running.
The alternator dosen't really know what size battery it is charging all it sees is the battery voltage the alternator output current should be
regulated by the alternator.
[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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jrrsparky
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| posted on 19/8/11 at 03:33 PM |
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Thanks for the replies,
I have a Odyssey Battery PC625: Dry Cell, 12 V, Deep Cycle, 265 Cold Cranking Amps, on at the moment, when i first tried it with the reverse the
engine didn't cut out, the only thing different that I can think of is the reversing light, I'll take the bulb out and try it but I doubt
the small amount of current it takes will make much difference.
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JoelP
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| posted on 19/8/11 at 05:04 PM |
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quote:
Originally posted by mark chandler
If you stick a car battery on a bike engine you risk frying the alternator !
I think you are thinking of the issues of jumping a bike engine off a running car engine. Not sure how a normal car battery would have any effect on
the bike engine - my bec had no probs.
Beware! Bourettes is binfectious.
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40inches
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| posted on 19/8/11 at 05:07 PM |
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quote:
Originally posted by britishtrident
Have you considered using a separate battery and a split charge relay ?
That's what I have done, with an intelligent split charge relay.
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