IMSA GTP Balance of Performance Adjustments for 2024
This article details the Balance of Performance (BoP) adjustments made by IMSA for the 2024 season of the GTP class. the adjustments aim to level the playing field between the different manufacturers competing, incorporating lessons learned from the previous year.While the changes are extensive, the BoP remains somewhat unpredictable.
Key Takeaways:
* Overall Trend: Maximum stint energy has been reduced for most GTP cars.
* Cadillac: Received the largest power increase below 230 kph but had a significant reduction in maximum stint energy.
* Porsche 963: Is the only car allowed to carry more energy, likely to compensate for a nearly 10 kW power increase at higher speeds.
* Organizers’ Approach: IMSA is taking a cautious approach while implementing changes based on last year’s data.
Detailed BoP Changes (Changes from previous year in parentheses):
Acura ARX-06
* Minimum Weight: 1,041 kg (-7)
* max Power (<230 kph): 520 kW (707 hp)
* Max Power (>240 kph): 505.96 kW (+4.16) (688 hp)
* Max RPM: 9,512 rpm
* Max Energy per Stint: 899 MJ (-2)
* Refueling Flow Rate: 22.475 MJ/sec (-0.100)
Aston Martin Valkyrie
* Minimum Weight: 1,030 kg
* Max Power (<230 kph): 513.760 kW (699 hp)
* Max Power (>240 kph): 520 kW (707 hp)
* Max RPM: 8,400 rpm
* Max Energy per Stint: 913 MJ
* Refueling Flow Rate: 22.825 MJ/sec
BMW M Hybrid V8
* Minimum Weight: 1,038 kg (+8)
* Max Power (<230 kph): 517.92 kW (-2.08) (704 hp)
* Max Power (>240 kph): 510.12 kW (-6.76) (694 hp)
* Max RPM: 8,000 rpm
* Max Energy per Stint: 903 MJ (-8)
* Refueling Flow Rate: 22.575 MJ/sec (-0.200)
Cadillac V-Series.R
* Minimum Weight: 1,033 kg (-27)
* Max Power (<230 kph): 520 kW (+20) (707 hp)
* Max Power (>240 kph): 504.92 kW (-7.08) (687 hp)
* Max RPM: 8,800 rpm
* Max Energy per Stint: 896 MJ (-13)
* Refueling Flow Rate: 22.400 MJ/sec (-0.325)
Porsche 963
* Minimum Weight: 1,035 kg (-7)
* Max Power (<230 kph): 517.92 kW (-2.08) (704 hp)
* Max Power (>240 kph): 510.12 kW (+9.88) (694 hp)
* Max RPM: 8,158 rpm
* max Energy per Stint: 903 MJ (+5)
* Refueling Flow Rate: 22.575 MJ/sec (+0.125)
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