[dlindem]

Now that I have achieved the high rank of tire kicker I gotta ask some more questions about my carb. it is a autolite 2100 on a 66 289. I have the wet float level nuts on at .750. The idle mix screws are 1.5 turns out and my plugs are nasty black and pretty wet looking. When I pump the throttle I get a pretty good dump of fuel down both venturi. With the engine running a crack of the throttle will either get a stall or a stumble depending on how warm the engine is. Above that point things smooth out and it runs good. I also noticed a lot of water in the exhaust trumpets although that may be from sitting all winter. I haven't seen any kind of smoke coming out of the exhaust.
I was joking with SWMBO about this being the longest carb rebuild in history but in reality I am almost ready to make a run to NPD and buy a reman carb any minute.
Any help is appreciated.

66 Coupe
C Code
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[Shaummy66]

Dave, I rebuilt my 2100 last year. Make sure all your other adjustments are correct. Thngs like
the proper throw on your accelerator pump rod, choke plate, IIdle speed,and mixture screws.
Now I read in the shop manual that 1.5 turns was a starting point. The on car adjustments
were to close them down 1 side at a time until the RPM's decrease, then open them until you reach
the Max RPM's. Then do the other side.

You may have to do this a couple times, to get them both dialed in. If the throw on the accel pump is not
in the correct holes, then too much fuel may be pumped in when you crack the throttle.

Did you rebuild this carb? Maybe the accel pump is leaking and putting more fuel than it should
down the carb. I wouldn't worry about the water in the tumpets. Probably just condensation.

Hope this helps.




'66 289 2bbl. Sauterne Gold Connvertible

Shaummy

 

[Guest]

I second what Schaummy said about the 1.5 turns being the starting point. When I adjusted mine I alternated screws though, making 1/4 turns on each.

I used the shop manual method as he describes but others use a vacuum gauge to find the spot with the highest RPMs at the highest vacuum reading.

My car runs much better now.

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[Torquewrench]

Shaummy stold most of my thunder because I also first thought of making sure all the various adjustments are done. I rebuilt a carburetor some time ago and finally went back and adjusted the whole list of choke and idle specifications and now the car behaves much better.

If you are still having problems, consider advancing the timing a bit. That can make a huge difference in how the car idles and reacts to acceleration.

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66 C-code convertible
66 C-code coupe
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[Shaummy66]

WOW, I've waited for years to steal the thunder on the Forum. Glad it could
be from you TW <G>.

Later,


'66 289 2bbl. Sauterne Gold Connvertible

Shaummy

 

[dlindem]

I was holding off on the tune up until I got the car back to where it was before I started working on the carb. I wanted a good starting point for the rest of the work I need to do.

66 Coupe
C Code
http://bio.wayne.edu/dave/st51.jpg