Multispark stuff and other thoughts

[Jim Pearl]

I was under the impression that there were benefits to waste fire - else 
why would anyone have used it at all? As for wasting a spark, I thought it 
was firing the waste? I'm confoozed here! I have been told that it reduces 
emissions - is this it's only saving grace?

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>From: 	Edward Hernandez (R)[SMTP:ehernan3 at ford.com]
Sent: 	Monday, April 01, 1996 1:57 AM
To: 	diy_efi at coulomb.eng.ohio-state.edu
Subject: 	RE: Multispark stuff and other thoughts


"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