Quote:
Originally Posted by weq92f
Depends on what can you have exactly... the article was discussing "adjustable vacuum advance" cans. Here's the info-graphic from the link that I based my comment on...
...seems to indicate both tip-in and total vacuum advance is adjustable...
-klb
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It looks like it more adjusts the amount of timing and it has a slight effect on the vacuum signal needed to add the vacuum advance. I'm guessing the slightly higher or lower spring tension adjusting it slightly.