Holley/Demon Carb stumble

Lots to grasp here and Thank you!!
First for the confusion.
I have a electric water pump that turns on at 160 degrees, and a electric fans that turn on around 190 and off at 180 degrees.
When my electric fan has turn on and off a couple of time. i start my testing(in garage testing)
That is what i did yesterday and do all the time. I Will not pull up to the starting line until my cooling fan has turn on a couple of times.
No secondary linkage removed just wacking the throttle too, the point of secondary opening, or to the floor.
I have changed to a smaller main body, i have replaced a questionable base plate. Changes squirter from 31 up to 37s with no change(stumbles at the track, change a squirter size up......Problem goes away or at least manageable for the rest of the race. Next race same story, stumble, bigger squirters, fixed. for the rest of the race.)<-------------Heat Sook explanation.

Like i said on a earlier post the only time this stumble completely gone a way was when it was doing the lean popping.

After it is heat sooked or maybe i should just say it gets warm enough that i doesnt stumble in Neutral. then i do a full throttle stomp in 3 gear, so i don't drive thru the garage, and my brake will hold me in place.

If that is still confusing, Please tell me were, and i will add more detail to help.
timing is 22 and 38 all in

Now to finish reading the rest of you post.:thumbsup: