Sooty rich Weber runner resolved

[La Voce]

Finally sorted the webers on my Alfetta GT, PO had a mix-match of idle/main jets and emusion tubes that were significantly larger than called for in the factory spec. It was simple and relatively inexpensive to swap it all out and now my plugs stay light brown, I don't blow soot all over the driveway at startup, and gas mileage is improved with no sacrifice in power.

[tek]

I think I'm finding out the same thing with my 69 Junior. It's jetted and throated more for a 1600 according to that nifty little program I downloaded from this site. Could be the PO some 20 years ago, (when gas was cheap) thought they'd up the performance by richening things up.
It sounds like the fuel isn't getting atomized, partly due to low air velocity, and the plugs are simply black. I'll probably change out the 28 mm choke tubes with 24's, as well as jetting down. Being at 3,000 ft also tends to richen the mix.
Thanks for your post, LaVoce.