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EFV-8 Club Forum / 1940 Ford Discussion / 91-99 Carb

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Discussion Topic: 91-99 Carb -- page: 1 2

kenburke

06-01-2011 @ 8:11 PM

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I have two. Both have different bases. The restoration book is of no help as to showing the correct base. Is there a better source or is there picture of the correct base?

Thanks

kubes40

06-02-2011 @ 6:51 AM

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Hi Ken,
I have attached a photo below of two carbs, both are 91-99's. The one on the right is NOS. Bases are (semi)triangular as shown.
If you need more detail, please let me know.
Mike Kubarth

kenburke

06-02-2011 @ 11:31 AM

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Thanks Mike,

This helps.

Ken

kenburke

06-02-2011 @ 1:56 PM

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Hi Mike,

This 94 has a base that is not in your pic. This 94 has a 94 facing the firewall, "H" in the body facing the passenger side as well as "Ford" script on that side of the float, and 91-99 on the driver's side float but not a 15/16 (which is on the 94 in my car). The 94 in my car has the base as you have shown. So what 94 application would this other base be for? I understand there are about 17 different 94 models. I understand that after 70 years anything could have happened. If the answer to my original question is what you sent me; That is a good enough answer.

Thanks

Ken

ford38v8

06-02-2011 @ 3:05 PM

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Mike, I've never seen an NOS 94! I believe it would be very useful to us all if you could present more detail. More pictures, your thoughts on the original as manufactured blackening of the cast iron bases and the original type of chromate color, or lack of it.

Thanks in advance!

Alan

kubes40

06-03-2011 @ 6:59 AM

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Hi Alan,
The base certainly appears to be painted just as the factory drawings advise. After all these years it remains fairly 'glossy'.
The die cast parts are NOT the 'yellow' phosphate often seen on vehicles but simply plain die cast pieces. All of the original 91-99's I have appear this way. A couple of them that are factory reconditioned by Ford (remain in the boxes) have that yellowed phosphate appearance.
From my research, the phosphate coating was a later process, apparently begun around 1945.
Kind regards,
Mike

kubes40

06-03-2011 @ 7:05 AM

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Hi Ken,
That base on your carburetor is most certainly not 1940.
Below are a few "tips" to identify a proper 1940
(85 & 95 HP) carburetor.
Mike "Kube" Kubarth

Part number 91A-9510A was manufactured by both Ford Motor Company and the Holley Carburetor Company.

Similarities of the two carburetors are:
•Finish is bare diecast.
•Bases were cast iron and painted gloss black.
•Exterior hardware was cadmium plated.
•Steel linkage was stamped.
•Idle mixture adjustment screws were brass. The slotted heads of these screws were 5/16" in diameter. Cadmium plated springs kept these adjustment screws from moving.
•An elongated vent hole in the upper body is evident.
•Cast upon the rear side was “94” within a 3/8" diameter circle.
•Cast upon the right side was the Ford script.
•It was fastened to studs in the valve chamber cover with three 33798 S7 hex nuts and three 34846 S7 lock washers.
•The carburetor base to valve chamber cover gasket, part number 40-9447 B, was dark gray in color with a shape very similar to the base of the carburetor.

Features unique to the Holley carburetor were:
•Cast upon the left side was “MODEL 91 99” within a ½" diameter circle.
•On the right side, cast upon the accelerator pump housing was “H” to indicate Holley manufacture.
•Cast upon the left side, atop the fuel bowl housing, was “U.S.A.” in 1/8" tall letters.
Features unique to the Ford carburetor were:
•Cast upon the left side was “MODEL 91 99” in two lines with approximate dimensions 3/8" high x ¾" wide.
•Some of this model had “15/16” cast upon the left side.

•On the right side, cast upon the accelerator pump housing was “F” to indicate Ford manufacture.
•Cast upon the left side, upon the fuel bowl housing, was “U.S.A.” in 3/16" tall letters.

kenburke

06-03-2011 @ 9:08 AM

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Once again Mike, THANKS, Well all of your info covers it! My carb in my picture is OK, so its just its base. The base on the 94 in the car is as you suggest as being correct. Ken

ford38v8

06-03-2011 @ 10:51 AM

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Hi Mike, Thanks for the word pics. Can you put up more pic pics? And comment further on the base? I cannot relate the two bases shown in your pic as having been treated the same. I would favor the theory that the original bases were hot tanked with a caustic solution to form an iron oxide finish. As there are many formulations of such finishes and processes, I suppose that the exact process will never be proven.

Alan

kubes40

06-03-2011 @ 3:21 PM

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Hey Alan,
The carb' on the right in the earlier photograph is a factory rebuilt. That may be why the base appears so much nicer than the NOS carburetor.
The cast bases were in fact lacquered originally. That may be why the NOS base appears "lighter". My guess is the paint soaked in to the casting a bit over the years.
I am not certain of the actual process but only of the specification.
Mike

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