Aircraft Speed/overspeed

Hey Guys,

I was wondering if there is a way to adjust the aircraft overspeed limit or a way to make an aircraft faster VIA the Aircraft file. Because I always seem to overspeed with most of my Jets at 330 mph. Last week i flew to iowa in a real plane and the pilot said we were at 525 mph. I fly the same jet with the same route as i took in real life and can't get above 330 mph w/out overspeeding.

This morning i flew the same route with my Hondajet and couldnt get above 215 mph. Can i fix this? (i didn't overspeed in this aircraft it just wouldn't get above 215 mph)

Could i fix both of these issues?

P.S I took my favorite jet back to iowa in real life....RJ145 Great Aircraft 😎