fv1620
Active Member
- Posts
- 104
- Location
- South Wales
Just because you can see a spark at the plugs doesn't mean you will have a spark under compression. More HT is needed to create a spark in the engine due to the gas density (related to compression & mixture) in air less voltage is needed to get a spark. If you disconnect the king lead to the distributor & cautiously hold it so that the wire is about 1/4 in from a metal point on the block then flick the points you should get a spark. I can get about 1/2 in doing this, if it is much less than 1/4 in you may not have enough voltage for a spark under compression.
The other thing is you should not see a great spark at the points, it is the function of the capacitor to absorb this. By minimising the spark there you not only reduce wear at the points but you have a more abrupt shut off of supply to the coil, that will mean a more rapid collapse of the magnetic field giving a greater HT output.
The other thing is you should not see a great spark at the points, it is the function of the capacitor to absorb this. By minimising the spark there you not only reduce wear at the points but you have a more abrupt shut off of supply to the coil, that will mean a more rapid collapse of the magnetic field giving a greater HT output.
