Cameron in UK
Member
There are 2 types of distributor cap. The top entry type use modern plug in leads. Really these are best as they allow a degree of waterproofing. The original Amphicar cap had side entry leads, some prefer the look of these and they work fine but ONLY if you use original type solid copper cored ignition leads.
The side entry caps make an electrical connection to the lead with a screw in pin. The connects fine with the low resistance copper but not with carbon, the point of contact is not big enough causing a hot spot and eventually the carbon burns and the lead becomes open circuit. So if you want to use a side entry cap don't cut the end off modern carbon leads, it'll come back and bite you, instead use proper Amphicar/Triumph spec copper cored ignition cable, this is easy to find and at the other end you can buy screw in rather than push on connectors for the spark plugs that also look like the original Lodge brand.
The side entry caps make an electrical connection to the lead with a screw in pin. The connects fine with the low resistance copper but not with carbon, the point of contact is not big enough causing a hot spot and eventually the carbon burns and the lead becomes open circuit. So if you want to use a side entry cap don't cut the end off modern carbon leads, it'll come back and bite you, instead use proper Amphicar/Triumph spec copper cored ignition cable, this is easy to find and at the other end you can buy screw in rather than push on connectors for the spark plugs that also look like the original Lodge brand.