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Re: [T3] Starter Question

On Sat, 2005-06-04 at 12:24, John Jaranson wrote:
> On Jun 4, 2005, at 12:10 PM, Russ Wolfe wrote:
> > On Sat, 2005-06-04 at 10:19, John Jaranson wrote:
> >> On Jun 4, 2005, at 10:03 AM, John Jaranson wrote:

> I thought one of the issues with the early 6V cars was that too much 
> current was passed through the ignition switch every time it was 
> started so the contacts wore out.  Also explained the large gage wire 
> that run back and forth to the switch.  One fix is to add a solenoid to 
> the system to eliminate the switch having to pass the high current 
> load.
> Maybe the 10-30 amps is too high for the switch too.
> Either way, will adding an additional solenoid into the system help 
> this problem?
> What do the later 12V cars do?  Or is it just a matter of less current 
> for the same power because it is now at 12V instead of 6V?  Electrical 
> stuff has never been my strong suit.  Can yo tell? <G>
P=EI Power(P) = Volts(E) * Amps(I)
So, if you need the same amount of power, (solenoid pulled in) and you
double the volts (6V to 12V) the current (I) is reduced by half.
Therefore, your 30 amp pullin current is now 15 amps.
If you jus put a ford starter solenoid in there, you won't help it much.
Next time you are at the salvage yard, find a later water cooled VW.
They use all kinds of high current relays. They will be plugged into the
top of the fuse box. And they will be marked on the relay with their
current capacity.
Example: 171 937 503A is 12V 40 amps.
	 141 951 253B is 12V 40 amps.
	 171 906 381  is 12V 2x10 amps
Those are just an example of some of what you can find in a W/C fuse
panel. If you can find a diesel, the glow plug relay is a really good
one. It is designed to carry about 60 amps, but it might have some solid
state circuitry to shut it off after a certain time.
And the nice thing is, most salvage yards will just about give those
relays away.
I find them laying in the dirt at the yard I go to. 

Russ Wolfe
'71 FB AT
'66 FB MT
'64 T34 (not running)
'65 T1 (not running)
'05 KIA Sorento SUV

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