[jazzy66]

I am rebuilding a 1958 4100 carb. I have tagged and bagged all the parts except for the "Venturi Cluster Assembly". The primary and secondary are different. One set has 4 holes in each side of the brass tubes and the other set has only two. Which set is the primary and which set is the secondary?
The set with 4 holes in each side has the letter A , a backwards B, and a 5 as a code. The other has a F with an upside down 2.
Thanks in advance for the help.
Phil

 

[ylexot]

I've noticed on my 2100's that there is usually a corresponding stamp where the venturi goes. I have heard this was becuase of factory calibration or matching. Do either of your mounting places on the carb body have these marks?

 

[camachinist]

Primary Venturi

Secondary Venturi

Note the differences...see those little brass tubes on the primary venturi assemblies?

When everything is right, you'll see this out of the primary side when rapping the throttle...

Getting this backwards is what earned Midlife my personal moniker "Ace Venturi" ...*G*

 

[Midlife]

You had to remind me? /forums/images/icons/tongue.gif

 

[jazzy66]

Thanks Pat. Pictures are worth a 1000 words.
Phil