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Pulsar Dizzy with positive earth?
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Author:  Curly [ Wed Sep 20, 2006 5:41 pm ]
Post subject:  Pulsar Dizzy with positive earth?
Any Auto-sparkies out there? Will the Pulsar D4R 83/85 electronic dizzy work on a positive earth car (Bugeye Sprite) ?
I know I could change the earth on the car over to negative, but I'm rather fond of keeping that aspect original. :?
Author:  Mick [ Wed Sep 20, 2006 5:55 pm ]
Post subject: 
I don't think you can....

Problem is that it is a transistorised ignition, and they are very polarity sensitive. Second to this is that there is a wire for the +ve side of the coil, and one for the -ve side of the coil, but nowhere is there a dedicated ground connection for the current to pass through to ground from the coil (the negative side of the coil is really a misnomer, it is simply closer to ground than the positive side, a bit like saying the Geelong side of the Westgate Bridge..). This means that it must be inside the distributor itself and probably near to impossible to convert without quite a bit of work and ingenuity.

If you have ever tried to install a car stereo into a +ve ground car, you will know the dramas that await you.
Author:  Curly [ Wed Sep 20, 2006 7:22 pm ]
Post subject: 
Thanks Mick,
I was pretty sure it was a no-go because of the transistor polarity situation, I just wanted some confirmation. :(
By the way I'd never fit a stereo to the Bugeye, it makes all the right noises without one, and I doubt that the old Lucas generator would take the load anyway. :roll:
Author:  deleted [ Wed Sep 20, 2006 8:16 pm ]
Post subject: 
mm, i was trying to get my engine with honda dizzy running again after i dropped it back in the other day. But no spark!! Couldnt work it out, then i switched the battery terminals to neg earth and it fired up!
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