. Hi all. Some time ago I read that old competitions car drivers realized that by inserting a gap in the HV cables, the spark in the plug was "reinforced", like getting a more energetic discharge and, consistenly, a better fuel ignition. This is a drawing about what I am talking about. The gap was obtained by inserting a isolating button and threading the cable tips throu two opposite button holes. [PLAIN]http://img97.imageshack.us/img97/7996/button1engl.jpg [Broken] By chicago49 at 2010-04-23 Is there an explanation for this spark strengthen by adding this gap to the HV circuit?. Thanks in advance for your reponses.