If you have the ALS on for long amounts of time then yes you will get high EGT's
But there is no need to have it on for long amounts of time becuase it has a use and not just for show.
I run 9psi on the spot without any issues.
Question:-
What differance is there if the car is on the spot with 9 psi or if its driving down the road with 9psi......
There is none other than natural airflow while driving will call the engine and turbo compared to if you was on the spot.
Hth
Regards
Jano