Look what I noticed when researching "Summit Racing Street & Strip Multi-Spark Digital CD Ignitions". I copied and pasted a portion of what was on the web site.

The capacitive discharge systems create the strongest spark possible at full voltage, with multiple sparks below 3,000 rpm to improve starting ability, idle quality, and throttle response, (((((while preventing plug fouling due to cylinder load-up))))))).


Roger
http://www.flickr.com/photos/45469713@N00/?saved=1