I'm not sure if this is only related to the savegame limit, or just the dbmodelparts parts limit, or something in the code that includes both limits.
As far as I've tested, this supposed limit of 115 cars or 130 cars, or whatever, has more to do with dbmodelparts.
You can manually edit ALL dbmodelparts of all vanilla cars and delete all unusable parts like DAMAGE_0 and DAMAGE_1. By doing this on all vanilla cars, you're almost guaranteed to be able to add at least 20 more cars, but of course, it also depends on how many parts those 20 cars have in their dbmodels.
In a copy I made and cleaned all the useless parts in all cars in dbmodelparts (including police and traffic cars too), I managed to have a total of 150 cars without any errors or bugs. I haven't tested if there was room for more cars, but 150 was as far as I tested after cleaning.
Bonus cars are also counted towards this limit, consider leaving the bonus car list with only the 15 rival cars.
As far as I've tested, this supposed limit of 115 cars or 130 cars, or whatever, has more to do with dbmodelparts.
You can manually edit ALL dbmodelparts of all vanilla cars and delete all unusable parts like DAMAGE_0 and DAMAGE_1. By doing this on all vanilla cars, you're almost guaranteed to be able to add at least 20 more cars, but of course, it also depends on how many parts those 20 cars have in their dbmodels.
In a copy I made and cleaned all the useless parts in all cars in dbmodelparts (including police and traffic cars too), I managed to have a total of 150 cars without any errors or bugs. I haven't tested if there was room for more cars, but 150 was as far as I tested after cleaning.
Bonus cars are also counted towards this limit, consider leaving the bonus car list with only the 15 rival cars.