New Zealand Datsun Club

Ok not a Datsun question but I'm using a Datsun flasher unit to, trigger a coil to use as a electric fence but both coils I've tried got hot the old one I can understand it's one that uses a resistor but even a new type got hot nice big spark though any ideas on getting this to run or am barking up the wrong tree

Yes, you're barking up the wrong tree.
In a car dizzy, the condesor stores a charge while the points are closed. Then when they open the condenser discharges it's jolt of charge which goes through the two circuits of the coil maaking it discharge a high voltage spark.
And given how points will burn over time, I imagine your flasher unit would burn out almost instantly if you tried to use it with a condenser in the circuit.

PS, I might have got part of how that works back to front. I'm not actually a mechanic.

the condesor stops the arcing across the points and I've got one in there to stop that just did not think the coil would get hot could be some thing to do with the dwel time rughly 80 times a min

yea I would assume the dwell.
Being at Idle a coil would be firing around 1600 a min times based on 800Rpm

i made an electric fence unit in high school using a car coil. It was a weapon!

im pretty sure you can buy a cheap kit that you just need to add a coil to

use this http://www.jaycar.co.nz/productView.asp ... rm=KEYWORD