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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Nov 2002 Posts: 2,774 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,774 | I have wanted to do this article for some time, but time did not permit. Now, circumstances beyond my control have given me more shop time. The article is a "paper" study of the 7 different Carter aftermarket YF carbs for Chevrolet 235 CID sixes. I did not include those for the 216, as there is significantly less interest. I am in the process of doing a "physical" study, where I will compare throttle arms, bottom plates, air cleaner arrangements, distributor port arrangements, etc. This study will be done with pictures, which will be added to the current article. Carter YF aftermarket carburetors for the Chevrolet 235Jon
Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | | | | Joined: Mar 2014 Posts: 4,510 Moderator, Electrical Bay | | Moderator, Electrical Bay Joined: Mar 2014 Posts: 4,510 | Thanks very much for this, Jon. Question for you...the info I have on the 3211s is this: main jet of .092" a metering rod (75-1584) with a power tip diameter of .048~.0485" and an economy zone diameter of .070~.0175" and a fuel inlet diameter of .076". Should I use the data you've provided instead? The metering rod data is virtually the same, but the main jet and fuel inlet diameters aren't.
~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
| | | | | Joined: Dec 2017 Posts: 1,652 'Bolter | | 'Bolter Joined: Dec 2017 Posts: 1,652 | Jon, many thanks for taking the time to write this up!
Mike
| | | | | Joined: Nov 2002 Posts: 2,774 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,774 | Jon G. - the specifications I listed for the 3211s are what I believe are the final specifications, printed in 1968.
I just double-checked to make sure I hadn't made a "fat finger" mistake, but I didn't.
The 0.076 fuel valve was used in the YF 938sa~938sd used on the Willys 134 CID 4 cylinder.
Jon.
Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | | | | Joined: Mar 2014 Posts: 4,510 Moderator, Electrical Bay | | Moderator, Electrical Bay Joined: Mar 2014 Posts: 4,510 | Thanks Jon,
I'll amend my records. The date on what I had was not dated 1968. Maybe they changed it?
~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
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