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140 carb question
Posted by: scottsable ()
Date: February 03, 2011 11:27AM

i was looking at a set of 140 carbs w/ linkage for a 65 corsa. is there any difference between a 65 and 66 or other years?

Scott sable

Roseville CA

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Re: 140 carb question
Posted by: davemotohead ()
Date: February 03, 2011 11:33AM

65 secondairy linkage is better than the 66 spring type IMHO.

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Re: 140 carb question
Posted by: Marco_a_p ()
Date: February 03, 2011 11:36AM

Yes. 65 is nearly direct linkage. No lock outs while the chokes are engaged, and not "progessive" like the 66 and later. I'm sure if there is a differnce from 66 to later linkage though. Steve Goodman or Craig will know better smiling smiley

Marco
Sun Valley Ca 91352

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Re: 140 carb question
Posted by: Spectre ()
Date: February 03, 2011 11:36AM

Early '65 linkage differs from late '65-69 linkage. Early '65 secondaries have no lockout mechanism so the linkage is more 'solid'. Later secondary carbs had lockouts (would not open if the primary chokes not open) and a compressable spring actuated linkage to open them.

Edit: looks like people beat me to the punch.

David Clamp


1965 Corsa convertible - 140 4spd/3.55/AM-FM

2013 Mustang GT convertible - 5.0, 6spd auto, Procharger i-1

2003 Miata SE - 6spd manual (wife's toy)

"Victory is mine!" - SG

Oklahoma City, OK

Click for Oklahoma City, Oklahoma Forecast



Edited 1 time(s). Last edit at 02/03/2011 11:37AM by Spectre.

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Re: 140 carb question
Posted by: scottsable ()
Date: February 03, 2011 11:39AM

ok cuz even though i have two used carbs that i dont want to use (390 cfm & 600 cfm ) and a 4-1 intake i still would need a new holley 390 plus linkage and that going to set me back $500.

OR i can pick up these used but rebuilt 1965 carbs prime and seconds with linkage and filters on them for $175.... plus that means i can drive today too grinning smileysmiling bouncing smiley

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Re: 140 carb question
Posted by: Mike Stillwell ()
Date: February 03, 2011 11:41AM

'67-9 140 linkage is very slightly different in regards to the spring on the secondary linkage, but otherwise identical to the '66 style. I prefer to use the '66 style and replace the spring in the secondary linkage with a piece of metal tubing. No problems for me with this set-up.

Mike
YS-117

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Re: 140 carb question
Posted by: Spectre ()
Date: February 03, 2011 11:59AM

I did what you did Mike, replaced the spring with a tube. I also have '65 secondaries with no lockouts (but lockouts are easy to disable).

David Clamp


1965 Corsa convertible - 140 4spd/3.55/AM-FM

2013 Mustang GT convertible - 5.0, 6spd auto, Procharger i-1

2003 Miata SE - 6spd manual (wife's toy)

"Victory is mine!" - SG

Oklahoma City, OK

Click for Oklahoma City, Oklahoma Forecast

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Re: 140 carb question
Posted by: Marco_a_p ()
Date: February 03, 2011 01:54PM

By placing the tubes, you would HAVE to defeat the lock outs?

What would be the advantage of the 66 and later over the 65 if you defeat the lock outs and the replace the springs to make is solid? Is there a difference in the opening rate of the secondaries vs. the 65's?

Just trying to understand why a 66 and later would be better than a 65 if the "updates" are over-ridden. Is it just that they are more common being available for four years instead of the one year only 65's?

Marco
Sun Valley Ca 91352

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Re: 140 carb question
Posted by: krfjkm ()
Date: July 07, 2018 08:50PM

Sorry for resurrecting an old post but I would to know how you guys defeat the lockouts on the late ‘65/66 linkage—

People have said “bend the tab”— not sure exactly which tab to bend—-

Thanks!

KRFJKM
Charlotte NC
1965 Corvair Corsa

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Re: 140 carb question
Posted by: 66vairman ()
Date: July 08, 2018 02:03PM

The lock out lever is held in place by a big head screw. I had some thin washers that were the correct size to put between the screw head and lever so when you tightened the screw the lever was locked out of way. Just did it for looks.

The easier way is to simply remove the lock out lever and screw.

BTW - the idle mixture screw is there because it's a 62-3 base - a Steve Goodman secondary modification suggestion.



Edited 2 time(s). Last edit at 07/08/2018 02:06PM by 66vairman.

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Re: 140 carb question
Posted by: krfjkm ()
Date: July 08, 2018 09:51PM

Thanks! That’s what I thought but wanted to be sure. I fiddled with it today and I think I have it adjusted properly now!

KRFJKM
Charlotte NC
1965 Corvair Corsa

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