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Old 8th January 2018, 06:46 PM   #1
Mark Boyers
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48 Ida linkage

I am just building up my 48 Ida carbs and manifold ,I have ended up with a center mount bell crank for a rear pull cable,I would like a side pull cable on the drivers side (English car) so if anybody has any pictures of side pull setups I could look at so I can decide wether to modify what I have or start from scratch that would be very helpful

Regards mark
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Old 9th January 2018, 12:03 PM   #2
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Re: 48 Ida linkage

Hi Mark,

A lot depends on which manifold you are using. Do your carbs all face the same way or do they face each other?

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Old 9th January 2018, 03:59 PM   #3
Mark Boyers
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Re: 48 Ida linkage

Letís see if I can post some pics. Ok no I was told I did not have a token ,admin please help
Regards mark
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Old 9th January 2018, 05:40 PM   #4
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Re: 48 Ida linkage

I've got an original linkage system for mine, the bearing blocks and bearings are new the crank is original got it from John Wisher (IIRC) about 12 years ago.

The crank runs the length of the engine and requires custom crank arms on the webers to ensure each 'bank' of IDA's open and close at exactly the same rate.

Also a photo of my webers and minifold, my webers all face the same direction. links from webers to central crank is by adjustable rod ends (left and right threaded to allow adjustment.

I had to write a computer program to get the correct weber crank geometry......I have a pic of the webers crank and adjusters somewhere on this site cant find it at the mo......
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48 Ida linkage-48ida01-jpg   48 Ida linkage-linkage-001s-jpg   48 Ida linkage-linkage-002s-jpg  
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Old 9th January 2018, 06:09 PM   #5
Mark Boyers
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Re: 48 Ida linkage

Hi Andy thanks for the reply ,my setup is a little different but the more bits and parts I look at the more chance I have of coming up with a solution, hopefully one of the admin guys will point me in the right direction to post pics soon then I can crack on with the solution ,I would like sort before I sit on the motor,

Regards mark
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Old 10th January 2018, 05:36 PM   #6
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Re: 48 Ida linkage

Hi Mark,

These are the pictures that came with my redline IDA setup disc
Attached Thumbnails
48 Ida linkage-f-bell-crank-braket-option-1d-jpg   48 Ida linkage-f-bell-crank-option-option-1a-jpg   48 Ida linkage-f-bell-crank-assy-option-jpg  
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Old 11th January 2018, 08:21 AM   #7
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Re: 48 Ida linkage

I think that you can do away with the bell-crank and the short connecting rod that goes to the first carb, fabricate a new cable bracket so that the cable pulls the lever of the first carb and then everything should work using the existing linkages.

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Old 11th January 2018, 06:46 PM   #8
Mark Boyers
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Re: 48 Ida linkage

Mine is not the same as nicks and I am still struggling to post any pictures if anybody in admin can help that would be great

Regards mark
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Old 12th January 2018, 08:47 AM   #9
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Re: 48 Ida linkage

Quote:
Originally Posted by Mark Boyers View Post
Mine is not the same as nicks and I am still struggling to post any pictures if anybody in admin can help that would be great

Regards mark
Mark's pictures
Attached Thumbnails
48 Ida linkage-img_2393-jpg   48 Ida linkage-img_2391-jpg   48 Ida linkage-img_2386-jpg   48 Ida linkage-img_2392-jpg   48 Ida linkage-img_2394-jpg  

48 Ida linkage-img_2387-jpg  
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Old 12th January 2018, 12:39 PM   #10
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Re: 48 Ida linkage

Have the pics shrunk in the wash?

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Old 12th January 2018, 12:55 PM   #11
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Re: 48 Ida linkage

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Originally Posted by MikeP View Post
Have the pics shrunk in the wash?

Cheers
Mike
Sorry Mike, Mark obviously took them for us younger generation with good eyesight
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Last edited by Nick Brough; 12th January 2018 at 01:02 PM.
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Old 13th January 2018, 03:03 AM   #12
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Re: 48 Ida linkage

Fwiw, I had a friend with Webers on his 351C on a Pantera and it drove him nuts. He could never get it to idle consistently. He had a hell of a time syncing them too.

Turns out that his intake and linkage were all aluminum. As the engine heated up the aluminum would expand, things would grow and it would slightly pull the butterflies open and the idle speed would climb 1000 rpm higher!
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Old 13th January 2018, 05:14 AM   #13
Mark Boyers
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Re: 48 Ida linkage

Thanks for that mike ,the motor will be of to Dyno as soon as itís built and the carbs will set up by a guy who looks after a lot of Weberís so I am confident that it will be sorted ,just want to sort the linkage before it goes so the time is spent turning and not dicking about sorting linkages out

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Old 13th January 2018, 05:58 PM   #14
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Re: 48 Ida linkage

larger pics for the hard of hearing
Attached Thumbnails
48 Ida linkage-img_2389-jpg   48 Ida linkage-img_2383-jpg   48 Ida linkage-img_2392-jpg   48 Ida linkage-img_2387-jpeg  
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Last edited by Nick Brough; 13th January 2018 at 06:07 PM.
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Old 14th January 2018, 01:11 PM   #15
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Re: 48 Ida linkage

Mark:

You appear to have the same intake manifold / carb set up as me. Here is how I fabricated a side pull bracket. Works splendily.

http://www.gt40s.com/forum/501763-post986.html

48 Ida linkage-img_8670-jpg

48 Ida linkage-img_9013-jpg

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