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Old 10-05-2015, 06:24 PM   #8
cableguy0
Senior Member
 
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,950
Re: Tuning carb with a Vacuum Gauge

The gap needs to be .045 to get a complete fuel burn. Without gapping the plugs properly doing the hei isn't improving much. The point of the hei is hotter spark. Without proper plug gap you aren't getting all of the benefits of the switch over. You need to get timing correct also. Make sure the mechanical advance is even working. What is timing set at idle?
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