PHR said it best above. The formula for getting the max and beyond are one thing, and average hot rodders just need to look at what others have done and do a basic copy of it.
This is where I see so many people use a formula and get pissed at the results and why I say formulas don’t work well and are not for everyday or even pretty hot builds. People get lost in them and choose based on what the math says only to be disappointed.
The only time I see people happy with the math is when they’re building a very specific certain something to do a specific strain something. By the standards of this forums routine chatter, this would be the extreme end are really hot engines.
If off the shelf parts can do the trick, you really don’t need the math.