Vacuum Advance Help
Thread Starter
|
Senior User
Joined: Nov 2012
Posts: 240
Likes: 0
From: Nashville, Tennessee
Vacuum Advance Help
Ive never had to do any work on a vacuum advance. I have never dealt with a carbureted engine before. All I know is that the vacuum advance is on the distributor. Where does it connect to? I've read some other threads that say you hook it up on the carburetor. Where on the carburetor? I have a motorcraft 2 barrel carb on my 302 h.o. if that helps anyone answer my questions.
Post Fiend
Joined: Apr 2008
Posts: 8,261
Likes: 15
From: Big Sky Country
You want to source a ported (part-time) vacuum source, which is any port on the carb above the throttle body...
Ports below the throttle body, be they carb or manifold, will be (full-time) vacuum, which you don't want/need as it negates the whole reason behind the vacuum advance philosophy.
I know there's a few on here that will argue my point, but ported is the only way to go....if you think you need full manifold vacuum on a stock/mildly built motor than you don't know how to tune a motor correctly.
Ports below the throttle body, be they carb or manifold, will be (full-time) vacuum, which you don't want/need as it negates the whole reason behind the vacuum advance philosophy.
I know there's a few on here that will argue my point, but ported is the only way to go....if you think you need full manifold vacuum on a stock/mildly built motor than you don't know how to tune a motor correctly.
Thread
Thread Starter
Forum
Replies
Last Post
Superred2
Ford Inline Six, 200, 250, 4.9L / 300
5
Dec 15, 2010 11:43 AM
cfrives3
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
8
Mar 4, 2008 09:42 PM
DeathMobile
1973 - 1979 F-100 & Larger F-Series Trucks
53
May 17, 2003 10:15 AM
