That sounds like an interesting modification for the Case combine harvester in FS25! Increasing the engine performance and setting a higher maximum speed of 100 km/h could really improve efficiency during harvesting. The larger capacity of 500,000 liters would also reduce the number of trips needed to unload, saving time and increasing productivity.
Ensuring that the modded combine harvester has been optimized to prevent any errors in the game's log is essential for a smooth user experience. Players will appreciate a well-tested and error-free modification that enhances gameplay without causing any technical issues.
Overall, the changes you've mentioned for the Case combine harvester high-speed mod seem beneficial and could make harvesting more efficient and enjoyable in FS25.