1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Secondaries, to move or not to move...

Thread Tools
 
Search this Thread
 
Old Jan 21, 2002 | 03:37 PM
  #1  
FuLLsMoKe's Avatar
Thread Starter
"By the beard of Zeus!"
Tenured Member 10 Years
 
Joined: Mar 2001
Posts: 867
Likes: 0
From: Huntsville, Alabama / Atlanta, Georgia
Question Secondaries, to move or not to move...

Well, I tied a twist tie to the secondary linkage thing (I have a low carb part vocab ) and attached that to part of the (?) diaphragm's (?) outside...

So, I drove around--pushing the car to about 6000 RPM, making sure the secondaires would open up. When I checked the twist tie, it didn't move or bend at all... Seems like the secondary didn't open. I was sure to tie the twist tie to the linkage and then pull it taut to tie to something else.

More Inspection (maybe the problem?):

Upon pushing the secondary linkage thing, I couldn't open the secondaries very far open--something stops it from opening up further... Is it normal that the secondaries do not open much? Or is there some vacuum device preventing that from happening when the car is off?

*Knows little to none about carbs...*
Reply
Old Jan 21, 2002 | 06:01 PM
  #2  
hanman's Avatar
Rotary Freak
Tenured Member 20 Years
 
Joined: May 2001
Posts: 1,779
Likes: 0
From: Peoria, IL
You don't want the twist tie "taut", you want it loose, just loop it over. You just want to see if the secondaries are opening, not restrict them from opening.
When you are trying to open the secondary linkage by hand, you must make sure that you are holding open the primary linkage. IF the primary throttle linkage is not open, it will not allow the secondary linkage to move.
The linkage will move by hand, the vacuum of the car running under load is what opens the secondaries when the car is moving.
hanman
Reply
Old Jan 21, 2002 | 06:47 PM
  #3  
FuLLsMoKe's Avatar
Thread Starter
"By the beard of Zeus!"
Tenured Member 10 Years
 
Joined: Mar 2001
Posts: 867
Likes: 0
From: Huntsville, Alabama / Atlanta, Georgia
I did have the tie taut, but i did not restrict it... what i did was loop it, just tight enuf to where it kept the tie taut--i'm pretty sure i did not prevent it from opening...

Is there anything i can check to see if my secondaires will open (vacuums, etc)?
Reply
Old Jan 21, 2002 | 07:17 PM
  #4  
peejay's Avatar
Old [Sch|F]ool
Tenured Member: 20 Years
Liked
Loved
Community Favorite
 
Joined: May 2001
Posts: 12,856
Likes: 568
From: Cleveland, Ohio, USA
just so we're all on the same page... the vacuum that opens the secondaries does not come from manifold vacuum, it come from the venturi effect in the primary barrels. the more air is flowing through the primaries, the faster it goes, the less pressure it has, the more the secondaries will open.
Reply
Old Jan 22, 2002 | 03:20 AM
  #5  
yayarx7's Avatar
Are you Nucking Futs?
Tenured Member 15 Years
 
Joined: May 2001
Posts: 1,235
Likes: 0
From: Abilene, TEXAS
You can take apart the secondary diaphram and check it for tears holes ect.

Just a hint
Reply
Old Jan 22, 2002 | 05:36 PM
  #6  
hanman's Avatar
Rotary Freak
Tenured Member 20 Years
 
Joined: May 2001
Posts: 1,779
Likes: 0
From: Peoria, IL
peejay,
I don't know about anybody else, but I am on the same page with you.
hanman
Reply
Old Jan 22, 2002 | 05:50 PM
  #7  
peejay's Avatar
Old [Sch|F]ool
Tenured Member: 20 Years
Liked
Loved
Community Favorite
 
Joined: May 2001
Posts: 12,856
Likes: 568
From: Cleveland, Ohio, USA
ok 'cos some people think that manifold vacuum opens them, which would be backwards because vacuum is highest under no load and lowest at max load, the opposite of what you'd want to operate secondaries.
Reply
Old Jan 22, 2002 | 05:53 PM
  #8  
Felix Wankel's Avatar
Super Newbie
Tenured Member 10 Years
 
Joined: Feb 2001
Posts: 4,398
Likes: 1
From: Birmingham, AL
yayarx7, those pics are way too big in your sig. The limit is 20k. Only the small Escort GT pic is under that
Reply
Old Jan 22, 2002 | 10:41 PM
  #9  
FuLLsMoKe's Avatar
Thread Starter
"By the beard of Zeus!"
Tenured Member 10 Years
 
Joined: Mar 2001
Posts: 867
Likes: 0
From: Huntsville, Alabama / Atlanta, Georgia
Originally posted by Felix Wankel
yayarx7, those pics are way too big in your sig. The limit is 20k. Only the small Escort GT pic is under that
I like his domino's avatar

I want a domino's hat...
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
73
Sep 16, 2018 07:16 PM
Bauer778
3rd Generation Specific (1993-2002)
10
Nov 4, 2015 04:42 PM




All times are GMT -5. The time now is 06:35 PM.