The Stromberg Of is, overall, the best of the accessory carburetors for Model T Ford. It is still fairly available, it is all brass and steel so there are no pot metal parts to deteriorate as there are on most carbs of the period. However, NOT ALL Stromberg OF's or for Fords. Just as the U & J and other carbs fit various or makes of cars, so did the OF. The most common of these is the OF for the Willys Overland. The holes in the flange are wider to fit the Willys manifold, the throttle arm is shortened by putting a tight crimp in it, the idle speed adjustment screw in tapped into a boss on the body of the carb instead of in the throttle arm and the choke end is machined and drilled to accept a curved pre-heater (that is usually missing.) Also, the idle jet has a different sized hole for fuel supply.
They do not bolt right on to the T manifold, nor does the throttle arm hook up without some modification to the carb.
Just a head's up, one of these just sold on ebay for almost $400. I hope the buyer wanted it for his Willys Overland instead of thinking it would bolt on to his Model T.
With Hershey around the corner.
What would the ONE thing that you could in a glance use to tell the difference?
The crimped throttle arm?
It's kind of two things. First is the crimped throttle arm, second is the idle adjustment screw threads through the brass boss from the back and pushes the arm away for faster idle as opposed to the design for Ford that has the screw coming in from the front of the throttle arm -- threaded through the U shaped part of the arm.
Stan, that was my carb that just sold. It had a model T size flange on it, and as far as the crimp in the arm, I held it up to a motor and it appeared that it would work fine. I am always willing to learn new things, but in this case, I think you were
Incorrect. I even ended the auction when you made me aware of your issues, and only put it on again when I didn't see any issue. It wa a nice carb. Tim Morsher
Wow I just got one at Hershey for $50
Might be a nice carb but it is the OF version made as a replacement for the Willys Overland. I have several of them and could scan the sales book for it if I had a scanner. It also has two holes in the choke intake that the Ford OF does not have to hold the curved intake piece. That matches up to the Willys pre-heater.
They later made an RF with the same wider holes to fit the Willys flange and the shorter arm to work with the Willys throttle.
It could be modified to work on a T Ford but it was built and sold as a replacement carburetor for the Willys Overland as well as a couple other small cars in the mid 20's. I've seen 4 or 5 of the Willys versions, some have the idle screw in the arm, some in the body.
I'm not trying to start an argument or bad mouth anybody, I'm just pointing out the differences. The Ford OF in these photos is NOS, the Willys Overland OF is very close to NOS.
I'll double your money
Stan, I see the difference between the bolt spacing for mounting and the crimped throttle arm. But I do not see "the idle adjustment screw threads through the brass boss from the back and pushes the arm away for faster idle as opposed to the design for Ford that has the screw coming in from the front of the throttle arm -- threaded through the U shaped part of the arm". Can you point it out? Thanks Mike
Thank you very much for the addition info and photos. Just what the doctor ordered. I wanted to be sure just in case I saw one I knew what the heck I was looking at, wouldn't have been the first time I bought something T related and found out it wouldn't work.
As it says, some have the idle screw in the arm, some in the body.
Great comparison Stan.
Stan, I don't have the pictures of said carb, but they still come up on eBay number 291250687834. I can tell you this one had the same mounting size as a model T. As for the other differences, I'm not sure, as I didn't study it very long.
I don't consider it an argument or bad mouthing, but need to clarity the carb in question would bolt right to a model T manifold. Your statement was that it was not a model T carb. The eBay market determined the value as connie starts my junque at 9.99 ....it could have sold for $10 or $10,000
Dean, I've had a dozen through the years and never paid more than $50 for one. I'd say that's a fair deal. You do that a couple more times and you can pay for your hershey trip. I use an RF and like it a lot.
Has anyone ever removed a Holley NH to run one of these things? My car runs like a top with the NH, but wondering what kind of improvement would be seen with a OF and if it's even worth messing with.
Dean - I thought vendors weren't allowed on the Hershey fields until tomorrow morning?
Dan, you would not believe the difference. There are all sorts of reason why Stromberg sold over half a million of these from 1922 to 26. They cost $16 then, or about 5% of the cost of a new car.
Thanks Stan. I did a search and found others who are converts.
I'd love to have one sitting on the shelf ready to go, so I at least have the option.
I don't have any complete and re-buildable ones right now that aren't spoken for, need some steel parts laser cut. I have about 20 bodies but need the steel parts for them so I can put them together. I keep buying more and taking the parts off. They are a lot harder to find than they used to be. I'm working on two of them tonight trying to get them in the mail tomorrow so I can work on a couple Zeniths and a couple OE-2's and a half a dozen Kingston 4 and 5 balls. Need to sell some stuff, got a car payment next week. Work, work, work. Off to the shop.