Packard Forum Index » Post-War (1946-54)

Coming together! Might be able to finish it up tomorrow.




An accelerator pump that works is going to be a big improvement! The old one was ripped.

Another deficiency that I found was the screw that holds the arm on the end of the shaft for the 4 bbls was loose. I think either the 4 bbls weren't opening all the way, or sometimes may not have been opening at all. This would make sense as sometimes I would take my car out for a drive and it would feel like a horse that has been in the barn too long, it just wanted to run!

Supposedly the Daytona float valves are going to be better as well.

We'll see if these Daytona float valves are as amazing as they say they are! I'm hoping for 25 mpg!

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Probably you are already aware, but the pair of butterfly valves only work in tandem when the choke is all the way open. Before that point, only the one set will open, except at full throttle an "unloader" cam will open the second set partway so that you can air out a flooded engine by flooring it while cranking.

So I like to check operation by confirming the unloader works with the choke closed, then I push open the choke and confirm the tandem operation. Of course, the exact values for the gaps that things have in various states are shown in the instruction sheet and service manual.

But if the second set was not connected at all, then you basically had a 2 barrel carb with this unloading functionality disabled in addition.

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The screw was quite loose, to the point I'm lucky I didn't lose it. Just to satisfy my curiosity I should have played around with it a bit when the screw was loose to see if the secondary butterflies were actually working or not, but I just tightened up the screw because things gotta be fixed!



Once I did tighten up the screw I checked and everything is operating as it should. The linkages and shafts are all in nice condition, very little wear.