Does This Debunk the "Coolant Can Flow Through the Radiator Too Fast" Idea???

There was no re tuning, power was down just like he said with ‘cold’ heads. I’m sure Jenny knows a lot more about engines than we do.
If he didn't re-tune for the cooler engine temp, he doesn't know as much as you think. Yall go ahead and argue it. I know what works from experience. Have fun!