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Old 03-16-2012, 09:07 PM   #32 (permalink)
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ECONORAM - '07 Dodge RAM 1500 QC SLT flex-fuel
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Originally Posted by JRMichler View Post
I believe that most of the difference goes away if the timing is advanced when running on single plugs. Longer flame travel distance on single ignition needs more spark advance.
That's what I was thinking. An aircraft engine twin plug setup doesn't need as much advance because each flame front has a shorter distance to travel.

Never had any success with Bosch +4s. I run Champion copper cores in my truck. I could run iridiums, but only to extend plug change intervals...
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