@flygarn12 raises a good question... @Avalanche - is there something you are hoping to achieve? or is there a problem you are trying to solve? or is this just experimentation to 'see what happens'?
The practical consequences of the router having the wrong time is usually minimal as long as there are no time-dependent services that run on the router itself. Those services would include https (which you say you are not using), VPNs (most, if not all modern protocols), logs (if you care about accurate time stamps), and possibly other services you might install onto your router. (FWIW, the opkg system will also fail if the time is wrong if it needs to retrieve the package lists and download packages -- those are served by an https server). If you're using your router for very basic stuff (i.e. just a router), it's probably not going to matter much at all.
However, it's not clear what is gained by turning off NTP synchronization. The resource savings would probably be barely measurable, and it's not like the time services don't represent a security risk, so there's really no compelling reason to disable the service.
With all that said, @Avalanche - if there is indeed some specific reason you've opened this thread that has not been addressed, please do ask specific questions for us to answer.
Otherwise...
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Thanks! 