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#1466894 Sat Sep 17 2022 02:15 PM
Joined: Jun 2008
Posts: 1,748
S
'Bolter
Bought a Carter YF 2100S carb at a swap meet and sent it off to be professionally rebuilt. It came back looking beautiful. Went to install it on my ‘54 235 and it wouldn’t fit. Turns out it fits a 216. Did Carter make two versions of the YF 2100S? I thought it was made for the 235. If so, I guess someone replaced the throttle body with one that fits a 216. Thoughts?

Attached Images
740B3C19-088A-4930-B626-0231812575AE.jpeg (148.68 KB, 160 downloads)

Chuck
1950 Chevy 1/2 ton (all original)
1951 Chevy 1/2 ton (future streetrod)
1941 Chevy coupe
1938 Chevy coupe streetrod
Joined: Mar 2010
Posts: 1,655
B
Curmudgeon
A professional rebuilder would have checked ALL parts and compared each with the respective model Carter specification sheet.
In my opinion you are due a reimbursement of some percentage.

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OTC Chevy.jpg (93.71 KB, 148 downloads)

"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."
Joined: Sep 2004
Posts: 231
M
'Bolter
To the best of my knowledge on the Carter YF 2100s throttle body, the SAE size 2 should fit a 216 and the SAE 3 should fit most of the 235s. The #2 has a 2 11/16" center to center stud measurement. The #3 is a 2 15/16" center to center stud measurement on the throttle body. Carb King and Jon G have some really informative information on the Carter YFs.

Last edited by MarkT; Sat Sep 17 2022 06:16 PM.

1956 Chevy 3200, 1/2 Ton, 235 CI
https://photos.app.goo.gl/TQQo1YnFjs3U7xB57
Joined: Mar 2014
Posts: 3,147
J
'Bolter
There are numbers cast into the throttle body. I can't see them on your images. Please tell me what they are and we can move toward solving the mystery. I'm away for a while and don't have my Carter notes, but working only from memory I think the 235 carburetor should show 788 and the 216 should show 630. If an incorrect throttle body was put on a 2100s I'm sad to say you may have a "frankencarburetor" made by somebody who had a 2100s float bowl, possibly a matching air horn and a 216 throttle body. A couple of years ago I bought a couple of Carter YF models which suffered broken throttle body flanges (either from being dropped or tossed I suspect) and had a great deal of difficulty finding parts carburetors. I think I have a throttle body which might work for you, however it is on a complete carburetor (with manual choke) made for the 230 Chevy.


Jon

1952 1/2 ton with 1959 235
T5 with 3.07 rear end
Joined: Mar 2014
Posts: 3,147
J
'Bolter
PS...I agree with bouymaker 100%. No professional rebuilder would have overlooked an incorrect throttle body on any carburetor. I'd be talking to that person/company/whatever tout de suite.


Jon

1952 1/2 ton with 1959 235
T5 with 3.07 rear end
Joined: Jun 2008
Posts: 1,748
S
'Bolter
Jon, looks like 1-630 to me. Let me know if you need anything else to help determine if I’ve got a Heinz 57.

And thanks bouymaker for the Carter spec sheet. I’ve saved it for future reference.

Attached Images
image.jpg (131.14 KB, 86 downloads)

Chuck
1950 Chevy 1/2 ton (all original)
1951 Chevy 1/2 ton (future streetrod)
1941 Chevy coupe
1938 Chevy coupe streetrod
Joined: Mar 2014
Posts: 3,147
J
'Bolter
Thanks! That is the 216 base. Please send me a PM in about a week and a half to remind me to see what I have.


Jon

1952 1/2 ton with 1959 235
T5 with 3.07 rear end
Joined: Jun 2008
Posts: 1,748
S
'Bolter
Okay, will do.


Chuck
1950 Chevy 1/2 ton (all original)
1951 Chevy 1/2 ton (future streetrod)
1941 Chevy coupe
1938 Chevy coupe streetrod

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