Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 11-21-2011, 03:03 PM   #1
hardtimes
Senior Member
 
hardtimes's Avatar
 
Join Date: May 2010
Location: South California
Posts: 5,895
Default throttle linkage Q..

Evidently, a lot of Model A owners utilize downdraft carbs. I'm asking questions regarding your linkage design/fabrication setup, because I'm always looking for improvements. Is there any source that fabs/sells such custom/professional linkage..or are you on your own in this endeavor? The stock model a linkage just is not designed for downdraft. Pictures of your successful fabrication would be great to share.
hardtimes is offline   Reply With Quote
Old 11-21-2011, 04:05 PM   #2
CarlG
Senior Member
 
CarlG's Avatar
 
Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 8,621
Default Re: throttle linkage Q..

The linkage for my Weber downdraft came with the "kit" -- Carb, Filter, Manifold & Linkage. Plug & Play!
CarlG is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 11-21-2011, 04:13 PM   #3
Charlie Stephens
Senior Member
 
Join Date: May 2010
Location: Southern California
Posts: 6,553
Default Re: throttle linkage Q..

There is a lever that mounts to a threaded boss on many manifolds. You could fabricate one but a cast one that looks good used to be carried by Sacramento Ford Parts, vintageford.com.

Charlie Stephens
Charlie Stephens is offline   Reply With Quote
Old 11-21-2011, 04:58 PM   #4
miss victoria
Senior Member
 
Join Date: Oct 2011
Posts: 310
Default Re: throttle linkage Q..

linkage and manifolds on ebay go to model a ford weber carb manifold / linkage. item#280774211472 and 280774211001

Last edited by miss victoria; 11-21-2011 at 05:09 PM.
miss victoria is offline   Reply With Quote
Old 11-21-2011, 10:22 PM   #5
hardtimes
Senior Member
 
hardtimes's Avatar
 
Join Date: May 2010
Location: South California
Posts: 5,895
Default Re: throttle linkage Q..

Quote:
Originally Posted by Charlie Stephens View Post
There is a lever that mounts to a threaded boss on many manifolds. You could fabricate one but a cast one that looks good used to be carried by Sacramento Ford Parts, vintageford.com.

Charlie Stephens
I'll check out these leads.
Also wondering if anyone has tried to use or thot about using a '32 four cylinder 'cowl' mounted 'spoon' pedal setup. It is long and brings the actuating arm fully across the cowl to an area parallel to the downdraft carb throttle actuating arm?
hardtimes is offline   Reply With Quote
Old 11-22-2011, 10:42 PM   #6
Charlie Stephens
Senior Member
 
Join Date: May 2010
Location: Southern California
Posts: 6,553
Default Re: throttle linkage Q..

Sponsored Links (Register now to hide all advertisements)
Quote:
Originally Posted by hardtimes View Post
I'll check out these leads.
Also wondering if anyone has tried to use or thot about using a '32 four cylinder 'cowl' mounted 'spoon' pedal setup. It is long and brings the actuating arm fully across the cowl to an area parallel to the downdraft carb throttle actuating arm?
What are you trying to accomplish? The throttle assembly where it attaches to the rod going to the carburetor ends up in the same place on a Model A and Model B. What are you working on? If it's an A or B just use the pedal assembly designed for the car. Post if it is something else like a home built speedster.

Charlie Stephens
Charlie Stephens is offline   Reply With Quote
Old 11-24-2011, 12:12 AM   #7
hardtimes
Senior Member
 
hardtimes's Avatar
 
Join Date: May 2010
Location: South California
Posts: 5,895
Default Re: throttle linkage Q..

Quote:
Originally Posted by Charlie Stephens View Post
What are you trying to accomplish? The throttle assembly where it attaches to the rod going to the carburetor ends up in the same place on a Model A and Model B. What are you working on? If it's an A or B just use the pedal assembly designed for the car. Post if it is something else like a home built speedster.

Charlie Stephens
Charlie,
I am working at getting "full" pedal and easily on the assembly that is pictured.
Presently, with floor mat/backing and original foot pedal linkage, I'm getting about half throttle. As pics show the linkage, as configured, does not have sufficient travel with foot pedal to flr mat ...for other end to open carbs fully. In other words there is insufficient travel of (pictured) right end of (STOCK) throttle linkage. Bending won't help anything. I think that it's a matter of leverage...that is , end of stock link is too short
And, this setup is not parallel, but downward pointed. Whereas, I think that the '32 that can be mounted on cowl (as on '32) can eliminate the intake mounted manifold lever (bellcrank) and be connected , via rod directly to carb.
Make any sense and or suggestions from what you see??
Attached Images
File Type: jpg 100_1690.jpg (58.9 KB, 112 views)
File Type: jpg 100_1691.jpg (62.4 KB, 122 views)
File Type: jpg 100_1692.jpg (50.2 KB, 100 views)
File Type: jpg 100_1693.jpg (68.3 KB, 116 views)

Last edited by hardtimes; 11-25-2011 at 02:02 PM. Reason: add...
hardtimes is offline   Reply With Quote
Old 11-24-2011, 01:14 AM   #8
Geo. H
Senior Member
 
Join Date: May 2010
Posts: 374
Default Re: throttle linkage Q..

You're probably going to have to custom make what you need. Problems I see are too low of a pivot on your manifold, and exhaust header interference. I don't see where the 32 pedal would help.
Geo. H is offline   Reply With Quote
Old 11-24-2011, 10:12 AM   #9
1931 flamingo
Senior Member
 
1931 flamingo's Avatar
 
Join Date: May 2010
Location: new britain,ct 06052
Posts: 8,774
Default Re: throttle linkage Q..

What if you put the top of your verticle arm on the bottom?? Or make a new verticle arm altogether??
Paul in CT
1931 flamingo is offline   Reply With Quote
Old 11-24-2011, 02:38 PM   #10
hardtimes
Senior Member
 
hardtimes's Avatar
 
Join Date: May 2010
Location: South California
Posts: 5,895
Default Re: throttle linkage Q..

Quote:
Originally Posted by Geo. H View Post
You're probably going to have to custom make what you need. Problems I see are too low of a pivot on your manifold, and exhaust header interference. I don't see where the 32 pedal would help.
No header interference...that is, appears closer in pic than is.
Pivot point is valid question ! thanks...Yeah, custom mabe it,eh?
hardtimes is offline   Reply With Quote
Old 11-24-2011, 02:42 PM   #11
hardtimes
Senior Member
 
hardtimes's Avatar
 
Join Date: May 2010
Location: South California
Posts: 5,895
Default Re: throttle linkage Q..

Quote:
Originally Posted by 1931 flamingo View Post
What if you put the top of your verticle arm on the bottom?? Or make a new verticle arm altogether??
Paul in CT
Good ideas , thanks !

Hmm, where's that fab guy (bchoppit??) mabe he has some fab input


Anyway, happy turkey day to all youse fordbarners and family today !!
hardtimes is offline   Reply With Quote
Old 11-24-2011, 03:08 PM   #12
V4F
Senior Member
 
V4F's Avatar
 
Join Date: May 2010
Location: ca.
Posts: 2,511
Default Re: throttle linkage Q..

the stock foot pedal wants to push & the carb wants to be pulled . the bell crank changes the pedal motion to a pull . build a flat aluminum lever ( 1x1/8") & attache it to the manifold , but leave a space so it will move freely . make it about 10" long & drill holes for the pivot & linkage to bolt to . drill the pivot hole about 4" from the bottom , then drill one hole at the bottom & top . use the linkage ends that snap over a ball (like on your stock pedal) .
i had to bend the linkage to get around my header on the bottom . also i bent the top (above the pivot hole) to match up with the carb . depending on how far your pedal will push the bell crank will determine the length of the rods ......... clear as mud ? .. steve
__________________
V4f
V4F is offline   Reply With Quote
Old 11-24-2011, 11:22 PM   #13
hardtimes
Senior Member
 
hardtimes's Avatar
 
Join Date: May 2010
Location: South California
Posts: 5,895
Default Re: throttle linkage Q..

Thanks Steve! I got your pics and will study your creation !
hardtimes is offline   Reply With Quote
Old 11-25-2011, 01:33 PM   #14
model.A.keith
Junior Member
 
Join Date: Oct 2011
Location: Uk
Posts: 25
Default Re: throttle linkage Q..










Work in (slow) porgress..........the aim is to get the 'bell crank' vertical.....and shorten the control rods to length, using a threaded bar set in the middle of each rod........as i said slow progress at the moment.



keith


.
model.A.keith is offline   Reply With Quote
Old 11-25-2011, 02:25 PM   #15
2935ford
Senior Member
 
2935ford's Avatar
 
Join Date: Mar 2011
Location: New Brunswick, Canada
Posts: 913
Default Re: throttle linkage Q..

Here is a system I used on a single downdraft. It was an Ansen intake w/header all from Red's Headers. He still carries them.
Worked very well.

Last edited by 2935ford; 06-30-2020 at 08:23 AM.
2935ford is offline   Reply With Quote
Old 11-25-2011, 02:33 PM   #16
2935ford
Senior Member
 
2935ford's Avatar
 
Join Date: Mar 2011
Location: New Brunswick, Canada
Posts: 913
Default Re: throttle linkage Q..

Here is the same car different motor dual downdraft setup (similar to yours).......still using the stock pedal arm.

Also looks like you need to turn your arm so the two holes are at the bottom.

Last edited by 2935ford; 06-30-2020 at 08:23 AM.
2935ford is offline   Reply With Quote
Old 11-25-2011, 04:21 PM   #17
hardtimes
Senior Member
 
hardtimes's Avatar
 
Join Date: May 2010
Location: South California
Posts: 5,895
Default Re: throttle linkage Q..

Quote:
Originally Posted by 2935ford View Post
Here is the same car different motor dual downdraft setup (similar to yours).......still using the stock pedal arm.

Also looks like you need to turn your arm so the two holes are at the bottom.
2935 ford,
Your second pic is a bit blurry to my ole eyes, but it kinda confirms what an early conclusion ...that I've come to, that is- that the SLANTED LINKAGE in your first pic , in my pic and in several other pics that guys have sent me is WRONG ! You are correct, I believe, that my bellcrank is not correctly positioned. BUT this bellcrank is NOT going to correct the problem like your SECOND pic linkage has corrected it! Your improvised bellcrank shows horizontal/parallel linkage and more correct use of mechanical leverage...thanks for your ideas/input
Anyone got something better...please show is a pic
hardtimes is offline   Reply With Quote
Old 09-12-2020, 11:58 AM   #18
Nosetime
Senior Member
 
Nosetime's Avatar
 
Join Date: May 2017
Location: Huntington Beach, Calif
Posts: 273
Default Re: throttle linkage Q..

with Stromberg Bullet ends, thread your own custom length rod. Secrets of Speed has a diagram on building an easy linkage
Attached Images
File Type: jpg 07B87EDE-9820-4583-A877-43FCE6AEC810.jpg (73.8 KB, 34 views)
Nosetime is offline   Reply With Quote
Old 09-12-2020, 05:12 PM   #19
john in illinois
Senior Member
 
john in illinois's Avatar
 
Join Date: May 2010
Location: Illinois
Posts: 1,942
Default Re: throttle linkage Q..

I just fabbed up a flat arm and put different spaced holes on each end. It is just a ratio you are looking for.

John
Attached Images
File Type: jpg 867CC079-3653-4C0F-9D39-EFFE3710F443.jpg (59.5 KB, 15 views)
__________________
Welcome each day
john in illinois is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 10:14 PM.