PINTO CAR CLUB of AMERICA

Welcome to FordPinto.com, The home of the PCCA => General Help- Ask the Experts... => Topic started by: 1974pintowagon! on July 17, 2017, 07:21:22 AM

Title: Vacuum advance
Post by: 1974pintowagon! on July 17, 2017, 07:21:22 AM
Where is best on a stock 2.3 to hook up the vacuum advance? Manifold or ported vacuum? Where is yours hooked up?
Title: Re: Vacuum advance
Post by: rob289c on July 18, 2017, 07:40:57 PM
My Mustang is hooked to a ported source.  I believe manifold vacuum would be at full advance all the time.
Title: Re: Vacuum advance
Post by: pintofarm on July 19, 2017, 08:39:32 AM
Only at idle is there a difference.  Both sources operate exactly the same off idle. So hook it to whatever source that provides the idle that you like.
Title: Re: Vacuum advance
Post by: The Whistler on July 19, 2017, 12:18:53 PM
Sorry to tell you port and direct vacuum do not operate the same at any point! Most Fords use Port vacuum! That includes all Pinto!
Title: Re: Vacuum advance
Post by: dick1172762 on July 19, 2017, 03:14:12 PM
YOUR SO RIGHT Whistler!
Title: Re: Vacuum advance
Post by: pintofarm on July 20, 2017, 10:35:55 AM
Could either of you please explain IN DETAIL how they operate differently than I stated above?
Title: Re: Vacuum advance
Post by: dick1172762 on July 20, 2017, 10:49:23 AM
Go to the Holley web site to find out. They tell it all better than I can.
Title: Re: Vacuum advance
Post by: dennisofaz on July 20, 2017, 05:57:22 PM
The difference between ported and manifold vacuum is:
Ported vacuum is low at idle (closed throttle), and full vacuum at open throttle.
Manifold vacuum is high at closed throttle, and low at open throttle.


Dennis
Title: Re: Vacuum advance
Post by: dick1172762 on July 21, 2017, 03:52:14 PM
Go to http://www.mortec.com/carbtip1.htm  for a very good site on Holley carbs. These people know Holleys.
Title: Re: Vacuum advance
Post by: justplainwill72 on July 23, 2017, 06:24:59 PM
All mine have been ported....but I prefer the mallory yl....kinda expensive but setup correctly and it's killer
Title: Re: Vacuum advance
Post by: dick1172762 on July 24, 2017, 01:04:47 PM
Think of it this way. Holley would not put the port outlet on the carbs unless it was the way to go. Don't fight it unless you have no vacuum port to use. If manifold vacuum is all you have, try it.