Looking for some advice from those with more Motorcraft 2100 experience than I.
My Bronco is a '69 with a V8. Original was 302, PO told me that a prior owner a couple times removed may have replaced the engine years back, and it is uncertain whether the current one is a 302, or maybe a 289. (At some point I'll drop the pan and look for the crank markings to figure out for sure.)
In any case, the engine is pretty much bone stock. Factory 2-BBL manifold, cast exhaust manifolds with 2¼" duals, original points ignition. Nothing at all special.
I have two different 2100s. Neither is road-ready now, either one will need a good rebuild. The question is, which one should I focus on.
The one on the engine now appears to be original to the Bronco (or perhaps to the swapped 289/302), as it is a manual choke with 1.08 venturis. No dashpots or other later add-ons. It runs on this carb now, but runs very rich, no choke needed to start cold and the plugs foul with black soot. (I suspect a bad float, but haven't pulled it apart yet.)
The other is a later 2100, with hot air choke, and the little pull-down in the back half of the top plate. No other dashpots, no electric assist on the air choke. It also says 1.08 venturis. The number stamped on the mounting ear is not really clear, but seems to say '2AFD', so I'm assuming it should start with 'D2' for 1972. It has a faded paper tag on the top indicating it is a rebuilt unit, but no idea who or when. Feels like the accelerator pump is bad. Otherwise it looks pretty good, but we all know that rebuilds can have all manner of mismatched stuff inside.
I'd prefer to not have a manual choke in the end. But of course, I don't have any of the hot air stuff other than the second carb itself. So either carb is going to need to need some changes.
Here's the real question - is there any real difference between these two carbs if they were rebuilt and set up properly? Should I focus on one over the other? Or just go with the later carb as being an easier path to an automatic choke?
I was looking at Mike's Carb Parts online, looks like the main rebuild kit is on backorder now, as is the electric choke conversion.
Any suggestions?
My Bronco is a '69 with a V8. Original was 302, PO told me that a prior owner a couple times removed may have replaced the engine years back, and it is uncertain whether the current one is a 302, or maybe a 289. (At some point I'll drop the pan and look for the crank markings to figure out for sure.)
In any case, the engine is pretty much bone stock. Factory 2-BBL manifold, cast exhaust manifolds with 2¼" duals, original points ignition. Nothing at all special.
I have two different 2100s. Neither is road-ready now, either one will need a good rebuild. The question is, which one should I focus on.
The one on the engine now appears to be original to the Bronco (or perhaps to the swapped 289/302), as it is a manual choke with 1.08 venturis. No dashpots or other later add-ons. It runs on this carb now, but runs very rich, no choke needed to start cold and the plugs foul with black soot. (I suspect a bad float, but haven't pulled it apart yet.)
The other is a later 2100, with hot air choke, and the little pull-down in the back half of the top plate. No other dashpots, no electric assist on the air choke. It also says 1.08 venturis. The number stamped on the mounting ear is not really clear, but seems to say '2AFD', so I'm assuming it should start with 'D2' for 1972. It has a faded paper tag on the top indicating it is a rebuilt unit, but no idea who or when. Feels like the accelerator pump is bad. Otherwise it looks pretty good, but we all know that rebuilds can have all manner of mismatched stuff inside.
I'd prefer to not have a manual choke in the end. But of course, I don't have any of the hot air stuff other than the second carb itself. So either carb is going to need to need some changes.
Here's the real question - is there any real difference between these two carbs if they were rebuilt and set up properly? Should I focus on one over the other? Or just go with the later carb as being an easier path to an automatic choke?
I was looking at Mike's Carb Parts online, looks like the main rebuild kit is on backorder now, as is the electric choke conversion.
Any suggestions?
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