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Username Post: Vacuum Advance- how is it supposed to work?
Forum Newbie
Posts 21
04-06-10 03:09 PM - Post#1893952    

I recently did a lot of testing with an HEI ignition on the dyno, including with and without the vacuum advance. Admittedly, the vacuum advance is more for road manners than all out power, but if you are interested, there's a video with all the info here:

http://streetmuscleaction .com/engines/hei/

I think the vacuum advance testing is in the second one.

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