Vacuum advance SOLVED

["Kerry Pinkerton" <pinkertonk@xxxxxxxxx>]

Thanks to everyone who responded.  The vac advance on the new distributor
(AI brand from Autozone 38 bucks with points and condenser installed) IS
adjustable with a 3/32 allen wrench.  Mike Sutton sent me a very detailed
process (attached) which really did the trick.  THANKS Mike!

Now I understand what the shop manual is talking about.  Never paid any
attention to that before.  I have the vac advance backed off to factory
specs and it doesn't start 'advancing' until over 10 inches of mercury.
Works like a champ  Also started with total advance as Mike suggested.

Now I have a VERY slight rattle when you first shower down on it just like
it's supposed to have and it idles great.

KerryP
Patch panels fabricated
Pinkertonk@xxxxxxxxx
dte.net/57imperial
Imperials -- 50 Limo, 57 roadster, 61's, 62, 68 Convert, 73, a 66 300 and a
bunch of lesser marques
----- Original Message -----
From: mike sutton <mikanlin62@xxxxxxxxxx>
To: <pinkertonk@xxxxxxxxx>
Sent: Wednesday, May 28, 2003 11:11 PM
Subject: distributor tricks


> Kerry,
>
> If you have a timing light that can show total advance, set the total with
> the vac advance unhooked to 38 degrees total for a big block.  Thats what
> Direct Connection recommends, then you tailor the vac adv to suit the load
> by turning a 3/32 allen wrench in the end of the vac advance, and the
trick
> is that more is less on the vac advance.  You have to start with it all
the
> way out and start adding advance, since youre not changing the amount of
> advance but youre changing the vacuum level that will activate it, youre
> changing the rate basically.
>
> 38 degrees is 2 3/8 inches from the TDC mark on the damper, so if you dont
> have the adjustable light, just make a mark at 2 3/8 inches away from the
> TDC mark, and set the total at say, 2500 or so, 3000...to make sure its
all
> the way advanced.
>
> Crane Cams also makes a chrysler dist adjustable advance, its the same as
> the factory stuff and adjust the same way, the main difference is the
> rotation direction between small and big block, and the length of the
little
> arm or the degrees stamped into it.  If you have a mity vac, just adjust
it
> one way or the other and check with the mity vac to see what way makes it
> more or less.
>
> I set the amount of  vacuum needed to activate mine to the curb idle
> reading, if it idles at 16 inches of mercury, i adjust the canister to
where
> 16 starts it moving, then if it still pings I just make it tighter.
>
> If this doesnt make sense, just drop me a line
>
> Mikey
> __________________________________________________________________ mike
> sutton ICQ#: 34908704 Current ICQ status: + More ways to contact me i See
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>