Holley/Demon Carb stumble

I had the day off and wasn't on call, so i slipped out to the track and did some testing. no timing equipment up at the track. just the track surface to make some stomps on. If i just need one i will sneak out the back road. but i wanted to string a bunch of them together.

This is the the same plug i posted above. pulled it off the trailer and let it idle, nothing else until it was up to 180 degrees(were my cooling fan turns on. shut it down to Pull this old plug out for a new one
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With the new plug install, i made a stomp down the track and clean killed as best i could. pulled plug out.
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drove back to the pits and pulled the plug again
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2nt and 3d stomp when i pulled the plug i cut the picture. didn't figure this out until i got home.
The last one is hot lapping! I did 3 runs back to back and then clean kill it at the top end to take these pictures
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That's as accurate as i can get Sorry some are blurry............what do you think of the fuel/jetting.....timing....heat wrange........ i want to hear all the appinions even if they differ one from another.

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What brand plug is that. It makes a difference in how it reads.

If that is an NGK and its changing color 4-5 threads down that plug is 2 ranges too hot.

Also, remind me what fuel. If it's pump gas, the timing is too slow, probably because the plug is too hot. It's hard to see in those pictures. Cut a shell off of the plug you think is the best so we can see the fuel ring and better see all the porcelain.

Edit: either not enough timing or you have a bunch of initial and too much total. Damn I just don't see enough in those pictures. Old eyes suck.