Hi everyone
Can you tell me if the carb spacers were included from the factory or if they were an after thought to help keep the carbs cool by adding some isolation from the hot intake/head?
I ordered a set and was just wondering if it was a do now or put off till a little later job:)
Thanks
Bob
Carb spacers
Carb spacers
Bob
66 Monza 2dr Converible, Automatic, (95 HP)
Marina blue, White Top, Black and White Interior
65 CORSA turbo - being restored
66 Monza 2dr Converible, Automatic, (95 HP)
Marina blue, White Top, Black and White Interior
65 CORSA turbo - being restored
- bbodie52
- Corvair of the Month
- Posts: 11894
- Joined: Mon Aug 06, 2012 12:33 pm
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Re: Carb spacers
The carburetor insulator is clearly shown as a part of the assembly in the attached 1965 Corvair Assembly Manual.
The issue with heat buildup in the Rochester carburetor is also mentioned on page 6 of the attached Delco Rochester Carburetor Service Manual, as follows…
Also, on page 9–13 of the attached section of the 1961 Corvair Shop Manual, the very first step in the instructions for installation of the carburetors on the engine reads as follows…This would seem to indicate that the insulator blocks have been in use under the carburetors since the very first model years. It is recommended that a carburetor gasket also be installed above and below the insulator to ensure a proper seal and to avoid vacuum leaks. The insulators themselves can develop cracks over time, and can also be damaged when they are removed from the intake manifold. The insulator should be carefully inspected to ensure that no small cracks have formed that could produce a vacuum leak at the base of the carburetor.Installation on Engine
1. Install insulator block in place, install carburetor on intake manifold studs…
The issue with heat buildup in the Rochester carburetor is also mentioned on page 6 of the attached Delco Rochester Carburetor Service Manual, as follows…
So it would seem that heat transfer from the air-cooled Corvair heads via the integrated aluminum intake manifolds to the carburetor mounting pads and on to the carburetor bodies was a well-known problem to Chevrolet engineers, and as such it was addressed in several ways — using insulator blocks between the intake manifold and the carburetors, and internally in the design of the Rochester H carburetors using an aluminum main well insert.MAIN WELL INSERTS
During very hot operation, the fuel in the main fuel well tends to boil and this produces vapor bubbles. The bubbles tend to interfere with fuel flowing into the main well tube which upsets good metering. To help reduce the effect of heat and remove the fuel vapor bubbles, an aluminum main well insert is used. This resembles the main well tube and completely surrounds it. This reduces the amount of vapor getting into the main well tube, helps dissipate heat and improves hot operation of the system.
Brad Bodie
Lake Chatuge, North Carolina
1966 Corvair Corsa Convertible
Lake Chatuge, North Carolina
1966 Corvair Corsa Convertible
Re: Carb spacers
Thanks Brad
I will move this task up on my priority list.....like I said I have them, ordered them in my first batch of parts,from Clark's....
B
I will move this task up on my priority list.....like I said I have them, ordered them in my first batch of parts,from Clark's....
B
Bob
66 Monza 2dr Converible, Automatic, (95 HP)
Marina blue, White Top, Black and White Interior
65 CORSA turbo - being restored
66 Monza 2dr Converible, Automatic, (95 HP)
Marina blue, White Top, Black and White Interior
65 CORSA turbo - being restored
Re: Carb spacers
Thanks Brad
I will move this task up on my priority list.....like I said I have them, ordered them in my first batch of parts,from Clark's....
B
I will move this task up on my priority list.....like I said I have them, ordered them in my first batch of parts,from Clark's....
B
Bob
66 Monza 2dr Converible, Automatic, (95 HP)
Marina blue, White Top, Black and White Interior
65 CORSA turbo - being restored
66 Monza 2dr Converible, Automatic, (95 HP)
Marina blue, White Top, Black and White Interior
65 CORSA turbo - being restored
Re: Carb spacers
Ok I see what I did...... Slow internet and I submit more than once.....hmmm.....need to be more patient :)
Is there a way to delete the topic.....probably not.
B
Is there a way to delete the topic.....probably not.
B
Bob
66 Monza 2dr Converible, Automatic, (95 HP)
Marina blue, White Top, Black and White Interior
65 CORSA turbo - being restored
66 Monza 2dr Converible, Automatic, (95 HP)
Marina blue, White Top, Black and White Interior
65 CORSA turbo - being restored
- terribleted
- Posts: 4584
- Joined: Sun Apr 18, 2010 2:36 pm
- Location: Atlanta, GA
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Re: Carb spacers
You can delete posts. Select edit at the top right of your post, then look and the bottom of that window there is a delete box:) Or you can simply use the delete X at the top right of your post.
Corvair guy since 1982. I have personally restored at least 20 Vairs, many of them restored ground up.
Currently working full time repairing Corvairs and restoring old cars.
https://www.facebook.com/tedsautorestoration/
Located in Snellville, Georgia
Currently working full time repairing Corvairs and restoring old cars.
https://www.facebook.com/tedsautorestoration/
Located in Snellville, Georgia