Setting the timming on a 3.9 - Defender Source
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  #1  
Old April 20th, 2012, 11:37 AM
bikerblock
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Kelly Block
1994 D-90 #1138
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Setting the timming on a 3.9

Replaced the seized vacuum advance and then set my timming to 10 degrees advanced, it ran very good. Then I break out the book and it says 5 degrees [+ or - 1] so I reset my timming to 5 degrees, engine run good but not as good. I also read the marks on the balancer can be off, What is your thought on timming a 3.9 with stock ingition?
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  #2  
Old April 20th, 2012, 01:01 PM
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LRover
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J. Michael McCaig
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More advanced will generally give you more power up to a point but you may experience pre-ignition knock using regular gas. I think I have at least one of mine set on 8 degrees.
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Old April 20th, 2012, 06:44 PM
bikerblock
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Kelly Block
1994 D-90 #1138
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I just reset it to 8 and will see what it does.
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