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Reply to "Mechanical vs Vacuum Secondaries"

Vacuum secondaries are easily set up to come in as early (or late) as you like, simply buy the secondary spring kit as shown below, & go lighter until you get the secondaries to open where you like 'em. Set your timing to be 32-34 degrees TOTAL, then install the yellow spring. If the distributors advance(s) centrifugal (& vacuum if also used) are set up right to pull in advance, you'll love the vacuum secondaries. View the chart below:

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