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Old 08-08-2009, 10:56 AM
vector1 vector1 is offline
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Join Date: Dec 2004
Location: Kansas City, KS
Cobra Make, Engine: jbl
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Default my understanding of mechanical advance & vacuum advance, tell me i'm wrong

received my dui dist. back from davis dui people. marked on the bottom of the dist. is 20 deg. at 3000. i'm thinking this is 20 deg. mechanical advance all in at 3000. there is a vacuum advance but it should be on top of the mechanical advance, and mechanical advance checked with vacuum not hooked up.

i can set total mechanical advance at 34 deg. at 3000 rpm and let it idle down and it shows about 22 deg. at idle, or i can set the idle advance at 12 deg and total advance will only go to about 22-24 deg. so i'm thinking there is only 10-12 deg mechanical advance on the dist. i don't know where they are getting the 20 deg. instructions by the way recommend setting idle avance at 12 deg., no other reference to checking total mechanical.



this is pretty much the same way it worked when i sent it in. vacuum canister works well regarding advance.

am i missing something here, if not i'll have to call them monday.
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