Quote:
Originally Posted by nkaminar
I have a different opinion than Synchro. The black around the edges is carbon from oil and I would not worry too much about that. There no sooty black deposits on the electrodes which would indicate running rich. The plugs look like the fuel ratio is about right. If you close the GAV all the way and loose power then that is too lean. The sweet spot is where you want to run the carburetor. With alcohol in today's gasoline the Model A will want to run with the GAV a little more open than in 1930.
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Agree. The plug aside from the black deposits on the threaded part, looks text book, the electrodes are tannish that is a good sign. That is where it counts. Black sooty deposits on the electrodes would indicate too rich of a mixture. I don't see that here.
Our '29 Tudor got 20 MPG all day long, this is Cornbelt country all flatlands no mountains
