When did Holley 94's start using power valves?

F

FordCustom

Senior Member
I just bought a carb online from someone, and surprise... No power valve? It's a 2110 model, or says so on the back anyway. Shouldn't it have a power valve if it's a later model? It doesn't even have a place to bolt one on? I'm not racing the flathead, so I wonder if this will affect drivability/performance for an 8BA?:confused:
 
No power valve???
From the very start a power valve was used, the 2110 still has a power valve. It's under the float bowl. Half sticks up into the float bowl, other half can be seen when you pull off the cast iron base.
The power valve has nothing to do with racing, it's necessary for proper carb function.
Don't get confused with the spark valve that sticks out of the base on late 94 family carbs.
Martin.
 
Oops. I did confuse them. Sorry. I guess I will bolt it on tonight and see if it will run. Was rebuilt ten years ago and never run, or so I was told.
 
I have many threads, and a lot of people supposedly leave them off and plug the hole, when used in a racing only application.
 
The spark valve was used on 94 type carbs from '54 thru '56 on Ford passenger cars and light trucks. Before that there was no provision on the carb base to have one.

Sal
 
Sal,

You seem to be familiar with this; can you explain what the "spark valves" do, and why Ford (Holley) added them? I had one 2110 that I rebuilt when I was bored and filled/ground down the base so it looked more like a 94. I ran it on my '51 for a week or so and it seemed to run just fine.

Tubman

("CharlieNY" or anyone else who knows, feel free to respond.)
 
I don't know exactly what it does, but it is associated with use of the loadamatic distributor, which has no centrifugal advance, just vacuum. If you are not using that type of distributor, the valve and associated circuitry (passageways) are redundant.

Mart.
 
Well at least I know my new to me carb is at least more correct. The current carb has a spark valve on it, the new one does not. The truck is a 50 model F-1 with a V8 flathead. I'm also curious as to what their job is.
 
If your truck has the 8BA (8RT) type distributor you probably need the carb with the valve.
(I think we were both typing at the same time).

Mart.
 
Mart,

For clarification, a '50 8RT carburetor would have a power valve, but not a spark
valve, right? My '51 car with a loadamatic doesn't (and never did) have a spark valve.

Tubman
 
The spark control valve retards the ignition timing during acceleration by cutting off the manifold vacuum passage to the distributor, allowing only venturi vacuum.
 
Sh*t, I don't know. I'm a 59A man. I thought it was an 8BA/loadatrouble thing??

Mart.
 
The spark control valved Holleys were used on loadomatic '54 to '56 Y-blocks, not any flatheads.
 
I'm attaching a link to the Holley 4000 (Teapot) manual that has an illustration, plus text that explains the operation of the spark valve for the Load-o-matic advance system. Would actually love to slap the person/s that designed it based on it's slow response and being over complicated, and completely different than all other systems.

Pages 10, 11 & 12 have the info in the manual. Same principle as the Holley 94 carbs.

http://www.tocmp.com/manuals/Carbs/Holley/H4000/C228/index.php

Sal
 
Well, it runs fine, in fact much better than the old carb when it was rebuilt. Smooth idle and snappy throttle when revved. Couldn't tell how it drives, the brakes are full of orange dust. Thanks for the help. I did notice the new/older carb is a lot smaller than the spark valved version. I think I am going to go out and idle it a little before dark.

https://www.facebook.com/miguel.lott.7/videos/1205432366135737/
 
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