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Mod | | | Forums66 Topics128,051 Posts1,055,764 Members48,426 | | Most Online14,466
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: Jul 2010 Posts: 8 New Guy | | New Guy Joined: Jul 2010 Posts: 8 | I have a 61 with a 235. The posts I've read on this site says a carter 2100s will work on this engine. But when I went to put it on, the bolt holes are wrong. The original Rochester holes are 2 15/16 OC and the Carters' are 2 11/16 OC. Did some 2100's come with different bases? I'm out a bit of money now if I can't make this work. Any suggestions would be appreciated. | | | | | Joined: Nov 2002 Posts: 2,765 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,765 | The Carter 2100s came only with the size 3 (2 15/16 c-c) throttle body; but Dr. Goodpliers (the evil twin of Mr. Goodwrench) has been known to make modifications that often do not work, and then offer their mistakes for sale.
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: Jul 2010 Posts: 8 New Guy | | New Guy Joined: Jul 2010 Posts: 8 | Are the throttle bodies interchangeable? It doesn't appear to be modified in any way. Could I maybe pick up a size 3 somewhere and it will screw right on? | | | | | Joined: Nov 2002 Posts: 2,765 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,765 | If you can find one from a 2100s, yes. Otherwise, probably not.
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: Dec 2011 Posts: 133 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2011 Posts: 133 | I have a carter 2100 on my 52 216. Smaller bolt pattern and not the correct carb for a 235.
If you never tell a lie, you never need to remember what you said.
| | | | | Joined: Oct 2006 Posts: 9,671 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 9,671 | According to Jon's very complete list of Carter YF carburetors produced for use on
Chevrolets the; 2100s was an aftermarket manual choke for use on a 235 engine
1953~1956. So an unmolested 2100s is the correct carb for a 235 Chevy.
As Jon said, you’ve got a carburetor that was backyard engineered and the seller unloaded
it on you. In other words, someone swapped the bases from an earlier YF somewhere
back in the day so they could use it on a 216.
DG
Last edited by Denny Graham; 02/21/2012 1:54 PM.
Denny G
Sandwich, IL
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