On 30/08/2010 15:27, "james duncan" <awpptdt@yahoo.com> wrote:
> When the load on the battery is increased, the battery voltage drops.
Agreed
> If the starter cable increases the load then the battery must over come this
>load as well as the starter load.
The starter cable doesn't increase the load, it increases the resistance.
More resistance = less current
> If you have access to a battery tester hook it up
> and gradually increase the load and watch what happens to to the battery
> voltage or hook a multimeter to the battery. If you have a good strong battery
> the voltage will drop a volt or two, a poor battery will drop 5 or 6 volts and
> hence a slow dragging start.
Yes, Because of the internal resistance of the battery, which is higher in a
poor battery.
Derek
--
'03 ST4s abs
Scotland
> From: Derek Blackie <d.w.blackie@dundee.ac.uk>
> To: st2_owners <st2_owners@yahoogroups.com>
> Sent: Mon, August 30, 2010 5:24:01 AM
> Subject: Re: [DucatiST] Motolectric - Odyssey
>
>
> I fail to see your reasoning here. The higher resistance of the starter
> cable does indeed drop the voltage to the starter but it DOES NOT drop the
> voltage at the battery and hence to the ECU etc.
> The voltage to the ECU and other systems will only drop dependant on the
> internal resistance of the battery - unless they were connected to the
> starter terminal which they aren't!
>
> Derek
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