Join Date: Mar 2002
Location: Austin, TX, USA
Not usually for mechanical advance. If you had vacuum advance, you'd see about 20 degrees at idle. Then off idle it would dip down closer to 14 and then start back up again with the mechanical advance.
BTW: Sounds like you've got your advance dialed in pretty good. Now it's cut-and-try time where you monitor performance, listen for pining, and optimize the advance.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI