Simmons carb
- Thread starter Woodys29
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Purdy Swoft
Well-known member
I run a cast iron Simmons on my sept . 29 . I mostly just clean them up , paint them and run them . I'm not sure if any parts are available . I would maybe try Renners corner . I have used some Zenith parts that will fit if necessary . I use the Zenith bowl gasket and add a hole for the power passage . The needle valve and seat can usually be cleaned up . Some have good luck using tooth paste as a cleaning-polishing compound for the needle and seat . I know that there are at least two styles of needle and seat assemblies and they won't interchange . Simmons made both cast iron and alloy versions that looked similar . The alloy version had smaller jets and was designed for better gas mileage . The cast iron version was more of a performance carb . The cast iron Simmons carburetors are well made with thicker cast than any of the Zenith carbs . The Alloy version can suffer the same problems as other pot metal carbs like warpage at the flange where it connects to the intake manifold . I prefer the Simmons cast iron carbs over the Zenith 1&2 carbs . The only reason that I haven't run Simmons cast iron carbs on any of my dual updraft setups is because of their weight . Western Auto use to handle them , They also offered a alloy version with a Wizard name plate riveted to the upper carb .
Purdy Swoft
Well-known member
I feel that you will like it . Good luck !!!
Bob-A
Well-known member
Woody/Purdy,
I don't mean to hi-jack the thread, but I've got some Simmons carbs too.
In the near future I hope to try them out. One is a (Simmons #A-9510-B)
carb for replacing the '28-early'31 Zenith. The other (Simmons #A-9510-C) replaces the late '31 Zenith "side sediment bulb" carb. I've also got a Simmons (part #B-9510) carb which is the replacement for the Zenith "B"
carb. It will come much later for trying out. Besides some Zenith parts being interchangeable with Simmons. I have found that one of the round gaskets in a Tillotson carb kit works as a gasket for the Simmons float valve. I'm also thinking the Tillotson throttle plate will also work in a Simmons carb.
Bob-A
PS: Purdy I still owe ya' for the throttle shaft.
I don't mean to hi-jack the thread, but I've got some Simmons carbs too.
In the near future I hope to try them out. One is a (Simmons #A-9510-B)
carb for replacing the '28-early'31 Zenith. The other (Simmons #A-9510-C) replaces the late '31 Zenith "side sediment bulb" carb. I've also got a Simmons (part #B-9510) carb which is the replacement for the Zenith "B"
carb. It will come much later for trying out. Besides some Zenith parts being interchangeable with Simmons. I have found that one of the round gaskets in a Tillotson carb kit works as a gasket for the Simmons float valve. I'm also thinking the Tillotson throttle plate will also work in a Simmons carb.
Bob-A
PS: Purdy I still owe ya' for the throttle shaft.
Attachments
Purdy Swoft
Well-known member
Nice looking carburetors , Bob !!!!!! I'm glad if the throttle shaft helped . Thanks for the thought .
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Bob-A
Well-known member
I have a 1933 Simmons catalog and the pot metal carb is not listed. Late 30's up to maybe late 40's. Is what I'm guessing on when the pot metal carb became available.......
Bob-A
Purdy Swoft
Well-known member
The Simmons alloy carburetor also had the high speed or power passage like the cast iron version . The power passage came into action at near wide open throttle , similar to the model B Zenith . Instead of a high speed jet , the Simmons used a high speed passage . The main hold back over the model B carb was that the Simmons carb had the same size throat as the Zenith 1&2 carburetors that restricted air flow . I haven't seen a flow test on the cast iron Simmons carburetor . Flow tests showed that the Simmons alloy had the worse flow than others like Zenith 1&2 , Tillotson model X and the Marvel carb .
Bob-A
Well-known member
The '33 Simmons catalog lists 3 Model-A replacement heads:
#A-6050-A Standard compression list price is $ 6.50
#A-6050-B 5 to 1 high compression list price is $ 6.50
#A-6050-C 5.5 to 1 high compression list price is $12.00
The pic of the standard head in the catalog does not show any writing on it like I guess both the high compression ones do. I have a Simmons high compression head with the writing (Simmons High Compression Head for Model-A Ford, etc., etc.) on it. However, it is in storage at present and I do not know which compression it is.
Bob-A
Bob-A
Well-known member
Both my roadsters are "sporting" Simmons Swan Manifolds. First pic is the '29 (not running at present) and the second pic is the '31 roadster. The '31 roadster is shown with the Simmons "side bulb" carb. It is only on for the pic. I'm still running a Zenith-2 carb on the car at present.
Bob-A
Bob-A
