Hi Gents

I'm looking for any information that someone might have re power valves in the 1956 Ford teapots. The carbs I'm using have a #28 on them, but that number is totally meaningess to me. I also have a carb with a 50's something power valve. Again, no idea what that refers to. Anyone have any info? The carbs I'm using are list 1161

Thanks

Jim

The 55-57 Ford parts catalogue only lists one power valve diaphram part number for the single quad Teapot Holleys.  Remain cognizant that the power valve on the model 4000 Holley carbs attaches to the underside of main body top cover with the two secondary jets and one screw.  This is not to be confused with the anti-spark valve that looks like the newer style of Holley power valves and screws into the outside of the carb body on the passenger side.  The anti-spark valve is part of a vacuum circuit and helps to control the amount of venturi vacuum signal that ultimately goes to the distributor.

Lorena, Texas (South of Waco)

Hi Ted

Yes, I'm aware of the power valve actuator, but wondered if the valve that is actually moved below that (opens and closes) and lets fuel thru had different values? Make sense?

Thanks

Jim

PS If only one is listed, then that'll have to do

Jim:

On your other post, you stated that the engine runs great with the teapots.  What does it matter what number is on the PV?

John - "The Hoosier Hurricane"

Hi:

Power valves on a teapot are very different looking from the later Holley power valves, do not have a diaphragm, are solid brass instead of the large nut with an exposed diaphragm as later Holleys. The valve is operated by the economizer diaphragm assembly which is that long spring thingy that attaches to the top cover with one screw and two tubes. It is very important to have a leak proof seal on the top cover under the air cleaner bolt in or a vacuum leak will occur and the economizer spring will push the power valve open causing a rich condition as well very poor fuel economy.



The number 28 on the power valve means the diameter of the drilled orifice on the power valve as 0.028". This drilled orifice is on the side of the power valve between the threads and base. The #28's have one drilled hole in the side, larger power valves usually have two holes. I guess they measure the cross sectional area to get the size needed such as the #43 used in the 55 Power pack engines with teapot.



The #28 power valve is correct for a 56 Ford with 292 or 312 engine. The larger the number on the valve the larger the orifice and more area for fuel to flow through.

Power valves are (now most likely were) available in various values. I have seen as small as #21's to as large as #46's.



marv

Informative video:

http://www.youtube.com/user/charliemccraney#p/u/4/ZtsxDAnmXX8


Lawrenceville, GA

Interesting video. Many people do not know that problem with the vacuum leak. Very knowledgeable person there. Thanks Charlie.



here is some other links on this forum to discussions on tea pot problems.



http://www.y-blocksforever.com/forums/Topic21001-6-1.aspx

http://www.y-blocksforever.com/forums/Topic25447-3-1.aspx#bm25461



marv

Hoosier, as I mentioned, the engine does run great, but has only been run in in the chassis. I was just looking for more info to utilize later for tuning when the vehicle is on the road.

Jim

Marvh

Yes, that's the info I was after. Thanks. I don't think the valves are readily available these days, but it gives me an idea of what to look for later on,

Jim

To get in on your post without starting another thread about the Model#4000, I'm having problems with mine dying when I come to a stop, I have searched the forums and I know a lot of guys are having problems with the 4000.

Has anyone successfully changed the 4000 for another model carb, I've heard the Holly 600 can be adapted to the yblock.

I checked with Pony and they want near $550,00 for a carb and if it's eventually going to have the same problems I can't see dropping that kind of money and still have problems later on when the carb gets some wear on it.

I would appreciate anyones input on this.

Claim to fame is the car was used as an extra in the movie Diner with Micky Rourke, Steve Gootenburg, Paul Riser and Kevin Bacon.