P-47D-25

- Air Realistic Battles: Keep at 4.3 as it is
- Increase the manifold pressure limit of the Republic P-47D-25 Thunderbolt from 56" Hg to 64" Hg, resulting in improved engine performance (Bug Report)
Reasoning: Currently, both the P-47D-22 (Razorback) Thunderbolt and P-47D-25 (Bubbletop) Thunderbolt have nearly identical engine performance, both operating at 56" Hg and producing around 2,300 bhp at War Emergency Power.
@Rockonanon33 submitted a bug report proposing an increase in manifold pressure for the P-47D-25 to 64" Hg, as implemented historically. At 64" Hg, the engine would produce approximately 2,535 bhp instead of 2,300 bhp.
However, the report was accepted and then closed as “Not a Bug.” Here’s BRM’s comment in the bug report, stating reasoning for the “Not a Bug” classification:
The developers have reviewed it in full. Currently, there is no error here. No changes are required at this time. Increasing the boost pressure to 64 inches of mercury will change the aircraft’s performance, requiring an increase in the aircraft’s battle rating in the game. So this modification is not planned for now.
For this reason, I propose increasing the P-47D-25’s manifold pressure from 56" to 64" Hg. As it stands, both the P-47D-22 and P-47D-25 have nearly identical engine and flight performance. The main advantage of the D-25 is a slightly higher power-to-weight ratio due to differences in the turbocharger, while the D-22 retains a slightly better flight model due to its lighter airframe.
I disagree with the reasoning that adjusting the manifold pressure would necessitate a BR increase, especially considering the P-47D-25 is already at 4.3, while the P-47D-22 sits at 3.7 and can be considered superior in some aspects.
Therefore, the P-47D-25 should receive the historical 64" Hg manifold pressure at WEP to better differentiate its performance from the D-22.
Additionally, the P-47D-28 Thunderbolt already uses a 70" boost in-game. Modeling all three variants (D-22, D-25, and D-28) with their respective boost settings (56", 64", and 70") would create a clearer and more logical performance progression within the Thunderbolt series.