speedyxjs
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| posted on 11/8/09 at 02:09 PM |
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Ballast resistor
I understand its the norm to have a ballast resistor between the battery and the coil.
Do i need to have one?
How long can i resist the temptation to drop a V8 in?
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tegwin
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| posted on 11/8/09 at 02:16 PM |
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Now that all depends on your coil doesnt it 
I have a 12V sports coil... it does not need a balast..
Most standard 6V coils recieve a 12V feed when you crank the engine... and then a 6V feed (via the balast) for "normal" engine
running...
So... what coil do you have?
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www.verticalhorizonsmedia.tv
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Mr Whippy
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| posted on 11/8/09 at 02:19 PM |
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Depends on the coil, if it does then it should be written on the side of it.
All it for is to reduce the voltage to the coil when the engine is not cranking over or rather when it’s simply running.
When cranking the resister is bypassed giving the coil full 12v supply to ease starting by giving a stronger spark at the plug. This is because the
starter motor is sucking most of the available battery power.
If you didn't fit it to a coil that needed one, then the current going through the distributor points would be too high normally and they would
be quickly (within a couple of thousand miles) burnt out, even with a capacitor fitted.
A classic VW Beetles coil doesn't require a resister btw 
mines a better description tegwin 
[Edited on 11/8/09 by Mr Whippy]
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tegwin
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| posted on 11/8/09 at 02:26 PM |
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quote:
mines a better description tegwin
You just used more words....
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Would the last person who leaves the country please switch off the lights and close the door!
www.verticalhorizonsmedia.tv
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MikeRJ
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| posted on 11/8/09 at 03:00 PM |
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quote:
Originally posted by speedyxjs
I understand its the norm to have a ballast resistor between the battery and the coil.
Do i need to have one?
Do you have points or electronic ignition? If the later then you definitely don't need one.
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speedyxjs
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| posted on 11/8/09 at 03:05 PM |
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Its points.
I think its a 12v but il check later.
Cheers guys 
How long can i resist the temptation to drop a V8 in?
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russbost
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| posted on 11/8/09 at 07:05 PM |
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Ballast coil is approx 1.6 ohms, standard 12v is approx 3 ohms
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speedyxjs
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| posted on 11/8/09 at 07:30 PM |
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Thanks russ
How long can i resist the temptation to drop a V8 in?
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