Multispark stuff and other thoughts

[Edward Hernandez R]

"Why fire two plugs? Waste fire! I'd love to take a shot at burning
any unused fuel left in the chamber..."

To what end? It will do you no good to burn charge on the exhaust stroke because you won't get any work out of it. You certainly risk
burning exhaust valves and other downstream components and if you
are convinced that you have burnable charge left in the chamber
during the exhaust stroke, you should take actions to prevent that
condition, such as running excessively rich. The term wastefire was
coined because you waste a spark in unburnable conditions.

Ed Hernandez
Ford Motor Company
ehernan3 at ed8719.pto.ford.com