Posted By: 3twos
Is this the correct dist vacuum advance? - 08/14/12 09:50 PM
Saw this picture on e-bay on the blue 69 gtx for sale. I wonder how it runs with the vacuum advance hooked up to the same port as the pvc valve?
Is this the correct dist vacuum advance?
Posted By: 340SHORTY
Re: Is this the correct dist vacuum advance? - 08/14/12 10:08 PM
depends on how the dist? is set. The way its plumbed its timed to run on full vacume advance. Some people do it this way and others do it the factory way.
Posted By: bobs66440
Re: Is this the correct dist vacuum advance? - 08/15/12 05:22 PM
Mine's (stock) on full time vacuum and it runs well... 
Posted By: JohnRR
Re: Is this the correct dist vacuum advance? - 08/15/12 07:53 PM
Quote:
Mine's (stock) on full time vacuum and it runs well...
But full time vacuum is not (stock) ...
Posted By: bobs66440
Re: Is this the correct dist vacuum advance? - 08/16/12 10:45 AM
Quote:True. I meant my distributor/vacuum advance is stock...Quote:
Mine's (stock) on full time vacuum and it runs well...
But full time vacuum is not (stock) ...
Posted By: Rick_Ehrenberg
Re: Is this the correct dist vacuum advance? - 08/16/12 11:54 AM
Hooked to the manifold, idle will be unstable, mainly w/ automatic trans. The tighter the t/conv., the worse it gets.
Rick
Rick
Posted By: YO7_A66
Re: Is this the correct dist vacuum advance? - 08/16/12 12:27 PM
""Hooked to the manifold, idle will be unstable, mainly w/ automatic trans.""
Only if the in D idle vacuum is lower than the vacuum rating of the distributor can. If you have enough vacuum in D at an idle to keep the vacuum can fully engaged, then the in D idle will be fine.
I would guess that allot of people that decide to use manifold vacuum just swap the vacuum hose and then wonder why they can't get the idle to work.
Note: For those who want to run manifold vacuum, chose the appropriate distributor can that is rated lower then your in D idle vacuum.
Only if the in D idle vacuum is lower than the vacuum rating of the distributor can. If you have enough vacuum in D at an idle to keep the vacuum can fully engaged, then the in D idle will be fine.
I would guess that allot of people that decide to use manifold vacuum just swap the vacuum hose and then wonder why they can't get the idle to work.
Note: For those who want to run manifold vacuum, chose the appropriate distributor can that is rated lower then your in D idle vacuum.
Posted By: JohnRR
Re: Is this the correct dist vacuum advance? - 08/16/12 02:25 PM
Quote:
Note: For those who want to run manifold vacuum, chose the appropriate distributor can that is rated lower then your in D idle vacuum.
Easier said then done , if we were dealing with a chevy or ford no problem ...
Posted By: RapidRobert
Re: Is this the correct dist vacuum advance? - 08/16/12 02:46 PM
I've never ran manifold but from what I've read on it it intrigued me enough to wanna try sometime. I'll just adj the allen wrench clockwise as far as possible if need be to get it all in at the lowest in hg with the can that is on there & see what develops and I have a vacuum pump with a gauge which should be a big help
Posted By: JohnRR
Re: Is this the correct dist vacuum advance? - 08/16/12 03:42 PM
Quote:
I've never ran manifold but from what I've read on it it intrigued me enough to wanna try sometime. I'll just adj the allen wrench clockwise as far as possible if need be to get it all in at the lowest in hg with the can that is on there & see what develops and I have a vacuum pump with a gauge which should be a big help
Pretty sure the number on the can is the MINIMUM vac required to move the can arm , adjusting the spring will not make it lower , just come in faster ... at minimum ... , or slower , higher vac ???
Posted By: RapidRobert
Re: Is this the correct dist vacuum advance? - 08/16/12 03:48 PM
I'm thinking the # on the arm is the amt of (dist) degrees a can offers
Posted By: JohnRR
Re: Is this the correct dist vacuum advance? - 08/16/12 04:19 PM
Quote:
I'm thinking the # on the arm is the amt of (dist) degrees a can offers
