50 F1 8BA (8RT) question.

[Mart]

Hello. I have a question for you post 59A guys.

In a F1 with a loadamatic distributor, the vac advance connects to the carb body. My friend has a 1950 F1. I was thinking the carb should have one of those valves that look a bit like a power valve sticking rearwards on the base. I found the attached illustration and it would appear there are earlier 8BA type applications that do not have the valve, and the valve was a later addition.

Can anyone confirm this is correct and that a loadamatic will run ok without that extra valve?

Thanks.

Mart.

[flatjack9]

Yes it will.

[petehoovie]

Originally Posted by Mart

Hello. I have a question for you post 59A guys.

In a F1 with a loadamatic distributor, the vac advance connects to the carb body. My friend has a 1950 F1. I was thinking the carb should have one of those valves that look a bit like a power valve sticking rearwards on the base. I found the attached illustration and it would appear there are earlier 8BA type applications that do not have the valve, and the valve was a later addition.

Can anyone confirm this is correct and that a loadamatic will run ok without that extra valve?

Thanks.
Mart.

[38 coupe]

Spark control valves were added to the carburetor bases in 1954. USA flatheads do not use spark control valves. The bases interchange and you can find all sorts of combinations these days. One combination to look out for is an 8BA era carburetor (49-53) with an earlier base installed that lacks the vacuum passage required to make the vacuum advance work properly.

[1952henry]

What 38coupe said….

[scicala]

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I agree with 38coupe also.

Sal

[tubman]

Back when I was young, broke, and stupid, I needed a carburetor for my '51 Ford. The guys at the junkyard had a later model with a spark valve. Not knowing any better, I bought it, removed the spark valve, ground the housing down and filled it with "Liquid Steel". It worked great, although it was totally unnecessary.

[Ol' Ron]

While on the subject of Ford carbs, Did the Ford trucks of the late 50's have a large version of the 94 Holley? I had a set of these on the Hydro engine and the throttle bore was aprox the ame size as the 2GC. I had to bore the intake to ckear them. I have several of the 1 1/16 carbs, but the throttle bore on them Is aprox the same as the 94.
Thanks.
Gramps

[scicala]

Originally Posted by Ol' Ron

While on the subject of Ford carbs, Did the Ford trucks of the late 50's have a large version of the 94 Holley? I had a set of these on the Hydro engine and the throttle bore was aprox the ame size as the 2GC. I had to bore the intake to ckear them. I have several of the 1 1/16 carbs, but the throttle bore on them Is aprox the same as the 94.
Thanks.
Gramps

Not sure if the trucks got the largest bore size like te '56 272 passenger car did.
The 1 1/16" carb you had with the same bore size as the early 94's was probably fron a '55 Ford 272. They had the 1 1/16" venturi, but still the smaller bore (ECG 5 carbs). In '56 they increased the bore size too and added an auto choke for pass cars (ECG 6 carbs).
Also some of these carbs were used on IHC trucks with even larger venturi's. Might have been 4 bolt bases though and with a governor.

Sal

[rotorwrench]

I'm not sure if Ford used the 2110 1 5/32" bore carb. I think that's about as big as they got and most of those types were used on big trucks like IHC, GMC, ans REO types. It was an aftermarket carb for a time.

Ford went toward the top bowl type carbs for cars the early to mid 50s. The overhead valve engines needed more advance than what the old Load-O-Matics would give so they were slowly replaced for larger horsepower engines. The Autolite 2100 types started showing up for the centrifugal advance with vacuum load control so the older Holley 94 style carbs were slowly obsoleted.

[tubman]

Originally Posted by Ol' Ron

While on the subject of Ford carbs, Did the Ford trucks of the late 50's have a large version of the 94 Holley? I had a set of these on the Hydro engine and the throttle bore was aprox the ame size as the 2GC. I had to bore the intake to ckear them. I have several of the 1 1/16 carbs, but the throttle bore on them Is aprox the same as the 94.
Thanks.
Gramps

Are you sure Ron? The 2G's are 1 7/16".

[rotorwrench]

There were two versions of the 2G/2GC types. The small bore had 1 1/4" bores and the larger bore had 1 1/2" bores.

[Ol' Ron]

I have some pictures of these carbs, but their on the engine when we were on the dyno, nut 1 1/4 is about the size of the 2Gc. Ther were also 3 bolt. I had to bore out the intake to clear the throttle blades. Wish my computer was better orginizes, be easie to find???
Gramps

[tubman]

Do either of you gentlemen own a calipers?

[38 coupe]

The last of these types of Holleys, the 2110s, had much larger throttle blades. I'm not sure how big since I have not bothered measuring but yes, near the size of the smaller GM two barrel diameter. What I find interesting, and not encouraging, is the bore in the base for the throttle blades is much larger than the bore in the center section. The center section bore is larger than the 94 carburetors, but still not large enough to line up with the big throttle blades.

[38 coupe]

Originally Posted by tubman

Do either of you gentlemen own a calipers?

I didn't have calipers in my hands, or much time to take the carburetor apart to take measurements, but did get a picture of a typical 94 on the right and a late large bore on the left.

[1952henry]

Again,38 coupe for the win. Have had one of those larger carbs. No mistaking that for a regular 94.

[petehoovie]

Originally Posted by 38 coupe

I didn't have calipers in my hands, or much time to take the carburetor apart to take measurements, but did get a picture of a typical 94 on the right and a late large bore on the left.