Holley 715 CFM #3259 float level adjustment

[Helmantel]

I have a quick change pot on another carb so I'll probably install that some time and test to find out the best spring. Installing the heavy one was more a matter of let's see what it does.

I agree that the chart is just an approximation with many variables. Or rather, the Holley table is probably accurate for that particular carb on that particular engine and serves as an approximation for other applications.