Which carb do I have?

[70stangcoupe]

I recently decided to rebuild the carb on my 250, but my local auto parts store is telling me that there where a couple different single bbl carbs used in 1970. is this true and if so how would I go about determining which carb I have.

 

[Shrinkdude]

There were a couple different ones. There is usually a tag on the carb to tell you the part# of the carb. They can use this to get rebuild kits and parts for that carb. You might take a picture of it and post it here and someone can tell you the type of carb it is. Also search eBay for 1bbl carbs to look at the pictures to see if that will help.
If all else fails take the carb to the place and have them look at it and see if they can tell. :roll:

 

[CZLN6]

Howdy:

The standard Factory correct carb for a '70 250 engine is a Carter RBS. It is quite distinctive and unique with its bowl setting forward, almost seperate from the rest of the carb. '70 was the 1st year the RBS appeared on the 250 engines.

For the '69 model year FoMoCo used an Autolite 1101. It is very possible this carb spilled over into the next year.

Either are good basic carbs. Easy to rebuild and work on. CHeck the throttle shaft for excess play. It is about the only thing not easily tackled in a home rebuild. Both have a weak accelerator pump system that seldon last for more than a few years. Both are susceptible to dirt and contamination.

The RBSs were used on vehicles with auto and manual trans with no real difference. All were with an external source auto choke, with hot air and vacuum pull off.

Keep us informed on your progress.

Adios, David

 

[powerband]

I had the same confusion not too long ago so I started collecting them to figure it out:

Here's the CArter RBS common to 70's 250's

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Here's a Carter YF series from a 1971 170 cid Maverick on the right. The left one I'm trying to ID as to it's CFM rating and application:

The lower right carb is the Ford/Autolite 1100 series common to all Ford sixes in the 60's. It is easily identifiable by the mechanical linkage bowl vent rod on the top front :

The three on the top Offy adaptor are Holley 1904's from the 50's and early 60's . Far left center is a Holley 1908 (?) If you have the one on the far right center - I'd be worried. Can anyone ID that one?..

Powerband 8)

 

[fordconvert]

Powerband, your mystery carb kinda looks like its off a tractor or some other non car type of thing but its kinda cut off in the picture and its been a while since I have worked on the ford tractor.