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 21Likes
10-16-2016, 01:34 PM
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CC Member
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Join Date: Sep 2003
Location: Switzerland,
CH
Cobra Make, Engine:
Posts: 536
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Weber linkage comp 289
I'm getting confused.
Looking on the pictures of the competition 289 (FIA or USRRC) it seems to me the linkage is as following.
accelerator pedal - tower Pilot - rear left and right 48 IDA
This is going via a center linkage for stabilisation
Afterwards the left carb is conected to the other left carb and the same on the right side.
I'm getting now told I need to connect each of the four carbs directly to the center linkage?!??
What is correct and were can I order such setup?
Mann thanks
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Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!! 
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10-16-2016, 03:23 PM
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CC Member
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Join Date: Jul 2006
Location: Redding,
CA
Cobra Make, Engine: FFR chassis and suspension, Mr. Bruce 289 FIA body
Posts: 1,066
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10-16-2016, 04:04 PM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
Posts: 18,997
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My guess is that if you look at 10 different cars you will have at least five different versions.
They used IDM, IDF two different intakes and some say Mag manifolds.
If on the shelf - in the car.
Last edited by 1985 CCX; 10-16-2016 at 04:12 PM..
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10-16-2016, 05:52 PM
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Join Date: Apr 2005
Location: Tucson,
AZ
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Jeff, is that original style aluminum foil? ;-)
Larry
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Alba gu brąth
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10-16-2016, 10:02 PM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
Ca
Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
Posts: 1,244
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As Jeff had stated the throttle linkage goes from the throttle pedal pivot mounted on the drivers foot box to the bell crank tower mounted on the rear of the drivers side cylinder head and then from the bell crank to the center pivot shaft mounted on the intake manifold. There were two different designs of linkage used on early opposed intake manifolds both used the center pivot shaft that was mounted in the center of the manifold and ran 1/2 the length of the intake manifold from front to back between two rod end bearings. The early setup used a linkage that ran from the center pivot to the rear or the left bank carb and then another linkage that ran from the rear left bank carb to the rear right bank carb, the front and rear carbs of both banks were coupled together with adjustable couplers. The later opposed linkage used linkages that connected to the center couplers inbetween the front and rear carbs on both banks.
Last edited by CompClassics; 10-16-2016 at 11:59 PM..
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10-16-2016, 11:42 PM
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CC Member
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Join Date: Sep 2003
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Hi all
Thanks for your replays.
This is my starting point:
And this is the car I was looking on CSX 2514.
But as already mentioned you can find this setup as well:
But what was correct and what would be better to setup and operate?
__________________
Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!!
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10-17-2016, 01:46 AM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
Ca
Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
Posts: 1,244
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Here is a good photo of the early setup....
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10-17-2016, 02:22 AM
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Join Date: Sep 2003
Location: Switzerland,
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Hi John
Many thanks for this great picture
Do you know if this is the only linkage connection to the left and right side Weber's, or if they've the same connection to the other pair of Weber's?
Unfortunately I can not verify it on your picture and as I need to start on ~field 1 I would like to do it correct.
__________________
Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!!
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10-17-2016, 09:16 AM
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Hi John
I did not see your explanation on post 5
Do you know a source for the paralell setup? With the carbs linked together per site.
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Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!!
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10-17-2016, 09:31 AM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
Ca
Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
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Which manifold are you using, parallel or opposed?
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10-17-2016, 11:46 AM
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Hi John
this is my setup
With your alternator braket
__________________
Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!!
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10-17-2016, 11:20 PM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
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Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
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I'm not seeing the photo....LOL, it just loaded!
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10-17-2016, 11:29 PM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
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Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
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Gotcha, you need the parallel linkage. I know you are wanting to maintain an original style setup so I would suggest individual (4) linkage rods that attach to the center pivot shaft. The rest of the linkage would be the same as the photo I posted with the bell crank and tower. I'll see if I have a photo of the parallel system.
Last edited by CompClassics; 10-18-2016 at 12:15 AM..
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10-18-2016, 07:30 AM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
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Will get better pic of mine tonight, BTW Inglese sells set up....
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10-18-2016, 07:54 AM
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Quote:
Originally Posted by 1985 CCX
Will get better pic of mine tonight, BTW Inglese sells set up....
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Inglese = Jim Inglese
I'm already in contact with him
__________________
Driving with your Cobra is fun,
Racing with your Cobra is amazing,
Driving hill-climbing races with your Cobra is.... HAVEN!!
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10-18-2016, 06:10 PM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
Posts: 18,997
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Not Ranked
This is for non-opposing set up, little different than John's picture above....
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10-18-2016, 06:25 PM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
Posts: 18,997
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Weber from top......
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10-18-2016, 08:14 PM
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CC Member
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Join Date: Feb 2013
Location: Carlsbad,
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Cobra Make, Engine: SAI FIA, 289HP (5-bolt), 48IDA Webers
Posts: 1,244
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Just for the record the color photo and the black and white photo of the different linkages I posted above are all SAI, the color photo is of CSX2155s engine and the black and white photo is from a SAI parts catalog.
When it comes down to it though, if you can make a linkage that works well for you and doesn't need constant adjusting it doesn't matter what it looks like unless you are trying to make it appear like the original SAI parts.
Here is a parallel SAI system that was removed from a Cobra in the early 1970s........
Last edited by CompClassics; 10-18-2016 at 08:32 PM..
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10-19-2016, 05:57 PM
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Quote:
Originally Posted by 1985 CCX
This is for non-opposing set up, little different than John's picture above....
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I'm glad to see the mention of non-opposing which now makes more sense for both options, opposing or non-opposing.
Versus parallel or opposing earlier in the thread, which makes no sense.
After all, all the setups are parallel.
If you walked into shop, and they asked which way your carbs are, and parallel was mentioned, I'm sure they would be odd looks.
All nice photos though.
Gary |
10-19-2016, 06:49 PM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Manchester,
NH
Cobra Make, Engine: AK1085 (302 Street), HTM111 (427 Comp), CSX2375R (289 Comp) and COB5999 (427 S/C)
Posts: 18,997
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John really is a master at this stuff. Many thanks.
John, in Oceanside next Thursday.
You around.
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