Sigh. OK if the 152 pilot has 30 minutes to run the Jug down might catch it.
At high altitudes, a chase that starts outside of gun range is limited by the Mach limit. The chased plane will lower its nose and can ride the compressibility for a good few minutes, completely irrespective of its max level speed. The chasing plane will do the same at its own Mach limit. WEP not needed and is not wasted. Not sure about the dive limits of the 152, but even if slightly higher than the P-47, the gap cannot be closed fast, if at all. A 152 will have to chase the P47N all the way down to the deck, by which time they have covered about 2 sectors. When finally at low altitudes the N can start using its 5 minutes of WEP which at max-speed level flight will carry it another 35-40 miles at a speed faster than the 152.
If the 152 will ever catch the P47N/M it will either be right at the beginning if the chase started from a small separation, or after a chase of at least 4 sectors. Good luck to the 152 with that.