C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Quadrajet Carb

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Old Jan 24, 2026 | 09:54 AM
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Default Quadrajet Carb

On my Quadrajet, what is this piece that goes into the manifold and has hoses going to the carb? Because I swapped it over to my other motor but the manifold doesn’t have a hold for it to go into so I took it off. Is it fine to run with out it?
On my Quadrajet, what is this piece that goes into the manifold and has hoses going to the carb? Because I swapped it over to my other motor but the manifold doesn’t have a hold for it to go into so I took it off. Is it fine to run with out it?
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Old Jan 24, 2026 | 10:13 AM
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That looks like the choke tube that supplies air to the choke housing. Cool air is drawn in one end (usually the air cleaner housing) and heated as it passes through the tube on its way to the choke housing that contains the spring. As the car warms up, so does the air... causing the spring to move. You will need to replace the choke with an electric one. Hope this helps.

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Old Jan 24, 2026 | 11:17 AM
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Here’s an article that talks about its function more, and what to do if you convert your choke to electric.


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Old Jan 24, 2026 | 03:38 PM
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Originally Posted by Abedman
On my Quadrajet, what is this piece that goes into the manifold and has hoses going to the carb? Because I swapped it over to my other motor but the manifold doesn’t have a hold for it to go into so I took it off. Is it fine to run with out it?
On my Quadrajet, what is this piece that goes into the manifold and has hoses going to the carb? Because I swapped it over to my other motor but the manifold doesn’t have a hold for it to go into so I took it off. Is it fine to run with out it?
If you run without it the choke won't open.
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Old Jan 24, 2026 | 05:53 PM
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I still run the hot air system.

I sent you a Private Message.

Please look read it when you get a chance.

Thanks.

Darryl
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