1955 F100 239 Carb/Dist Upgrade

[40cpe]

With respect, the method mentioned by Dave is only connecting the '57-up distributor to manifold vacuum and blocking the venturi vacuum, providing full manifold vacuum to the distributor at all times. This may or may not work well for you. I saw somewhere how to convert the 94 to true timed vacuum as on modern carburetors. I've searched my files and can't locate the process. Hopefully someone will jump in with the instructions.

[miker98038]

Thanks for the explanation on the late (55) 239.

On the later distributor with a loadomatic carb. Ask over at yblocksforever. I think Ted Eaton had an article on that, but I can't remember if it was for a 2 or 4 barrel. I don't seem to be able to Run the search function very well. Others can.

[scicala]

Originally Posted by miker98038

Thanks for the explanation on the late (55) 239.

On the later distributor with a loadomatic carb. Ask over at yblocksforever. I think Ted Eaton had an article on that, but I can't remember if it was for a 2 or 4 barrel. I don't seem to be able to Run the search function very well. Others can.

Ted Eaton's proceedure was for the Holley 4000 4 bbl (teapot).
It's the same idea, but a little different to do on a Holley 94. Still very easy.

Sal

[dmsfrr]

Originally Posted by miker98038

... I think Ted Eaton had an article on that, ...

Here's a link to that page on Ted Eaton's website, just in case anyone wants to look at it ...

https://www.eatonbalancing.com/2013/...-distributors/

[Daves55Sedan]

Originally Posted by 40cpe

With respect, the method mentioned by Dave is only connecting the '57-up distributor to manifold vacuum and blocking the venturi vacuum, providing full manifold vacuum to the distributor at all times. This may or may not work well for you.

That's correct and I completely agree with you. I do not believe that connecting direct manifold vacuum to the distrib vac advance would be similar to the signal you'd get from the '57 carburator. So I've always been skeptical of that method.

[BorisK]

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Here are the two Ted Eaton articles. Pretty sure 1st article is applicable to my ECG 94 carburetor.

https://www.eatonbalancing.com/2010/...-distributors/

https://www.eatonbalancing.com/2013/...-distributors/

Thanks for pointing me in the right direction.

[BorisK]

Sorry to have to many questions. I read the Ted Eaton article and still had one more question. I sent Ted an email but he hasn't responded yet. Here's what I sent Ted:

Hey Ted,

I've got a 1995 F100 with a 239 engine that I've been restoring. I've pulled the original Load-A-Matic Distributor and found I could upgrade to '57 mechanical advance distributor. After doing that I'll need to modify the carburetor. I read your following article. Thank you for taking the time to prepare.

https://www.eatonbalancing.com/2010/...-distributors/

I was wondering the purpose of drilling out the hole in the throttle body shown in the picture below. Will that hole be plugged with a set screw as was done on the carburetor body? I understand all of the other pictures, just wanted to make sure what I was doing before I drilled into it.



Thanks again. Numerous people recommended your articles.

Jeff Karloff

Omaha , NE

[BorisK]

Never mind. Somehow the following picture was omitted from the Ted Eaton article. It all makes sense now.

[rotorwrench]

I'd get an adapter and a Rochester 2G carb. It's a much easier carb to work with. Speedway has adapters for Ford 3-bolt manifolds like the flathead and early Y-blocks.
https://www.speedwaymotors.com/Late-...apter,808.html

[BorisK]

Wanted to give the wrap up on the Carb/Dist Upgrade.

I looked around to find a new '57 (or later) mechanical advance distributor and couldn't find anything that was reasonably priced. Instead I bought a CRT Performance HEI distributor and coil. I also used Ted Eaton's procedure to make sure the vacuum advance for the new distributor was coming off at the right place on the carburetor. Just a note...there is a missing photograph in Ted's writeup that is contained in the previous posts that supports Ted's writeup.

Got the dist/carb installed, figured out where # 1 TDC for the initial dist setpoint and fired it up. Ran great, even better when I adjusted the dist advance to the right setting. On the road it was a beast. No hesitation, plenty of power. Happy with the outcome. Thanks for the advice!

[scicala]

That's great ! Good job. Thanks for posting the outcome.

Sal

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1957 ford dizzy works very well with edelbrock carbs. Use the diver side vacuum port on the front of the carb. I believe that is direct manifold vac below the butterflies. What a great improvement. You cannot use the 56 dizzy.