I have successfully restored many standard Ford / KW coils according to Ron Patterson excellent proven methods. I now have some Heinze coils to look at and have determined the connections are the same though the side ones are off set. Anyone know what the secondary resistance should be and capacitor value. While I have varying readings between 5 Heinze coils I have here I am thinking the secondary and capacitor value is same as standard coils? Also the cases are very different any ideas on accessing capacitor before I delve in would be appreciated. Thanks John (UK)
Original wax paper and tinfoil capacitors should always be replaced, regardless of the coil's make. The secondary winding should have around 2500-3200 ohms resistance, though some good original coils can have close to 4000, and the windings should be checked with a megger after removing or disconnecting the capacitor to eliminate the possibility of carbon tracks or other shorts between the primary and secondary windings.
Extreme care is needed when digging out the old capacitor; the rosin with which the coils are potted is usually very hard, and the coil's secondary windings are wound on a multisectioned wooden spool that is about 1/3 larger than standard Ford windings, so there is very little room inside the case. Nicking into the secondary with a sharp tool will of course destroy them.
Now--heading off for Bakersfield!
Many thanks for the reply R V, appreciated.