Thread: Ignition Timing
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jwasbury jwasbury is offline
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Join Date: Jan 2008
Location: Weehawken, NJ
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Originally Posted by 930turbo View Post
Intake vacuum has an influence on mixture via the control pressure regulator. For example, if your initial timing is too advanced, your vacuum will be above design and cause the mixture to go lean.
FWIW, I tested my Control pressure regulator (WUR), and found that it does not respond to vacuum, only to boost. This is on my '79 US model.
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Old 02-10-2009, 10:19 AM
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