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Old 03-20-2020, 06:03 PM   #1
Overkill-F1
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Default New Carb Question

The previous owner handed me a remanufactured carburetor when I picked up the truck and I just now compared it to the original one.
There is one item on the base of the new one that I don't know want it is or want it does.
It is the silver item to the right of the idle adjustment screws.
Terry
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Old 03-20-2020, 06:08 PM   #2
alanwoodieman
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Default Re: New Carb Question

that is the later model "power valve location" I think, got a couple of those myself, look on the bowl of the carb and tell us what is there and the one on your carb
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Old 03-20-2020, 06:15 PM   #3
tubman
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Default Re: New Carb Question

It's not the power valve. Those are still inside the carburetor like the earlier ones. That is what is called a "Spark Valve". I'm not into the later carbs, so I really am not up on what they do or how they do it, but I can assuredly say that it is not interchangeable with a power valve. I think they may have something to do with making the "Load-a-Matic" work better. Just about every 94 rebuild kit you can buy these days contains both one of these and a regular power valve to cover the maximum amount of applications.
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Old 03-20-2020, 06:28 PM   #4
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Default Re: New Carb Question

Denny, this is a good explanation
http://m571.com/yblock/loadomatic.htm
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Old 03-20-2020, 07:44 PM   #5
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Default Re: New Carb Question

The spark valve was added to the Holley for the Y-Block V8 in '54 (EBU carb). It was also used in '55 and '56 on the Holley two barrel (ECG-5 and ECG-6).


The carb you posted with the spark valve appears to be a '55 or '56 truck carb (1 1/16" venturi) that someone installed an earlier throttle shaft and levers on.


Sal
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Old 03-21-2020, 11:11 AM   #6
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Default Re: New Carb Question

Quote:
Originally Posted by Angledrive View Post
Denny, this is a good explanation
http://m571.com/yblock/loadomatic.htm
Thank you for the link, this makes me want to replace the "Load-a-Matic" with a converted Chevy dist.

Quote:
Originally Posted by scicala View Post
The spark valve was added to the Holley for the Y-Block V8 in '54 (EBU carb). It was also used in '55 and '56 on the Holley two barrel (ECG-5 and ECG-6).
The carb you posted with the spark valve appears to be a '55 or '56 truck carb (1 1/16" venturi) that someone installed an earlier throttle shaft and levers on.
Sal
You are right, cast into the side of the carb is 1 1/16.
Terry
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Old 03-21-2020, 12:22 PM   #7
1948F-1Pickup
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Default Re: New Carb Question

Quote:
Originally Posted by Overkill-F1 View Post
Thank you for the link, this makes me want to replace the "Load-a-Matic" with a converted Chevy dist.
Tougher to do now without Bubba.
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Old 03-21-2020, 01:18 PM   #8
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Default Re: New Carb Question

Quote:
Originally Posted by 1948F-1Pickup View Post
Tougher to do now without Bubba.
Didn't Charlie take over converting chevy dist?
Charlie ny
Be sure to use my e mail....cas5845@yahoo.com
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Old 03-21-2020, 01:21 PM   #9
1948F-1Pickup
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Default Re: New Carb Question

Quote:
Originally Posted by Overkill-F1 View Post
Didn't Charlie take over converting chevy dist?
Charlie ny
Hadn't heard that.....
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Old 03-21-2020, 05:00 PM   #10
scicala
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Default Re: New Carb Question

I don't know if Charlie ny is helping out Bubba or not, but I know he also does the Chevy distributor to flathead V8 conversions.


Sal
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Old 03-21-2020, 05:39 PM   #11
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Default Re: New Carb Question

Actually, all other things being equal, I prefer "Charlie ny"'s conversions because of the "Hold Down" method. It uses a regular stock Ford distributor clamp setup rather than a set screw.

At least that's the way it was a few years ago when I evaluated them.
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Old 03-21-2020, 07:28 PM   #12
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Default Re: New Carb Question

I use Charlie's distributors exclusively. As i understand, he is buying Jim's stock of parts for his use. His are the best.
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Old 03-21-2020, 08:28 PM   #13
1948F-1Pickup
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Default Re: New Carb Question

That's good to know. I'm thinking of ditching my load-o-matic.
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