The protection map is so people dont do dumb things like go wot in 6th at 1800 and hold it. With 1 map you are running lean for a long time which is bad. With a time based map it goes “All right its been 3 secs at wot we dumping fuel!”. The 7.5s have a very aggressive lambda vs time map, you can see it in jb4 thread.
I actually went WOT in 6th at 2000 RPM and held it by accident. I was driving up a big mountain in 6th while trying to keep 60 mph, which was 2000 rpm. My car was making over 10 psi and starting to apply timing corrections according to my JB4 display. I ended up shifting in to 5th for the remainder of the mountain, but I managed to capture some logs in 6th. Turns out my car was going WOT even though my pedal was at maybe 30 or 40 percent. Unfortunately, I didn't think a "full load" scenario would ever happen for an extended amount of time at 2k rpm, so I was targetting .98 or something in that area across the board. I've since richened the full load table in that area after 3 seconds to .93 and the car pulls up the same mountain in 6th without timing corrections now. I'm also more likely to just put it in 5th now. =)
I think the lambda protection tables are in place for protection of the stock cat, so I leaned those out a bit to values just a bit richer than my normal fueling tables. I still have some fueling protection in place, but not targetting .70 or whatever. I think I have the tables st to .88 to .83.