After an afternoon of working in the yard I finally found a couple hours to spare before dark. I threw some new Autolite plugs in my 440. These are the Autolite equivalent of the RC12YC Champion.
I'm still trying to make my part throttle ping go away. I played with the fuel quite a bit the last time I worked on it (I don't have much free time these days). I wanted to make sure I wasn't to rich. I upped the jets in the carb quite a bit before giving last time.
In 26 miles of driving I had several full throttle goes from 1st, through 2nd, and let off a bit before 3rd. I never pulled over to read the plugs right after a pull though.
Here's what #4 looked like when I got home (Autolite plug so the base is black, that isn't oil).
P1230002 by
chilort, on Flickr
P1230004 by
chilort, on Flickr
P1230005 by
chilort, on Flickr
Here's the #8 plug:
P1230006 by
chilort, on Flickr
P1230007 by
chilort, on Flickr
P1230008 by
chilort, on Flickr
Thoughts?