Is your feature request related to a problem? Please describe.
With railcraft installed hopper minecarts have a 4 gametick cooldown, in vanilla that cooldown is way lower. It might be a bug in vanilla causing the low cooldown as @liach told me in discord but it would be very nice if the same contraptions people designed with the vanilla mechanics in mind wouldn't just be broken with railcraft installed.

Describe the solution you'd like
A config option for the hopper minecart cooldown, the default can stay 4 gameticks so it wouldn't change the current behavior at all but it would enable modpack makers to restore the vanilla mechanics a lot of technical players are used to and rely on.

Describe alternatives you've considered
Would also be fine if the values would just match the vanilla 1.12 behavior since vanilla is the base line when it comes to minecarts etc. But I guess since this is technically a bug that wouldn't be wanted.

Additional context
The low cooldown actually makes hopper minecarts usefull for systems that need the speed (for example a hopper minecart standing in the middle of 4 hoppers can distribute items equally which is useful without item pipes installed).
I think breaking a lot of community builds that rely on the vanilla mechanic wouldn't be nice, even if it's a bug, in minecraft a lot of depth actually is dependent on bugs like sticky pistons dropping their blocks on a short pulse. But yeah bug or not config option could make everyone happy I guess!