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suggestions on Ignition coils

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poolboy said:
so I was just saying that the plug gap I'm using is not so destructive as to leave a very noticeable trace of carbon in that particular location.
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But if the rotor fails due to over-voltage, that is not where the carbon track will be. On the failed rotor I saw, the carbon track was basically invisible, because it ran from the end of the distributor shaft to the underside of the conductor on top of the rotor (shortest path), which just happens to be inside the body of the rotor. Even knowing that the rotor was bad, and looking into the cavity in strong sunlight, none of us could spot the carbon track.

To make the mark on the blade more visible, smear some Vaseline or similar on the end, so there is something to carbonize. The blade itself doesn't have any carbon in it, so it can't leave a carbon track.
 
I don't think I'd want the rotor to sling anything like Vaseline around in my distributor cap, Randall.
Given enough time the scorch mark develops, regardless of it's composition
 
Good idea! You wouldn't want those electrons slipping and sliding around.

But if you use just a thin film, it won't sling off, especially just at idle.
 
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