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Warp_Drive_V3.1(Dx11)

Mod Specs:

Warp Drive_V3: This is a Star Trek inspired warp drive available on small and large ships the dimensions are 3x2x7.
large ship version requires 300mw of power and produces 1,200,000,000 of thrust.
small ship version requires 3mw of power and produces 2,000,000 of thrust

Modding the ship speed in Space Engineers is quite easy. All you have to do is to create a new folder in the game’s mod directory (the path is: C:\Users\{YOUR WINDOWS USERNAME}\AppData\Roaming\SpaceEngineers\) (If you have difficulties finding the log file, press WIN+R, in the box that will open paste %APPDATA%\SpaceEngineers and press enter.)
You can name this new directory as you want e.g. ShipSpeedMod. Inside this directory, create another new directory called “Data” (this time the directory name must be exactly the same). Then just copy the Enviroment.sbc file into Data directory. You can find the Environment.sbc file in Space Engineers content directory located in your steam library e.g : c:\Program Files (x86)\Steam\SteamApps\common\SpaceEngineers\Content\Data\
You can also try to search for the SpaceEngineers folders in your computer.

After you copy the Enviroment.sbc file you can change
<SmallShipMaxSpeed>100</SmallShipMaxSpeed>
<LargeShipMaxSpeed>100</LargeShipMaxSpeed>
value to any different value. As you can see there is separate speed limit for small and large ships. However, you cannot mod astronaut speed. Flying ship of the character is always 5% more than the maximum speed of any ship and walking is 30% more than the maximum ship speed.
Currently the speed can be from 0 (negative values will be set to 0) to half of the speed of light (bigger values will be clamped). It can happen that maximum speed will be a little more than the value set on the file e.g. for 200 value max speed, it can be 210 in game. This is a normal behavior.

Also half the speed of light is 149,896,229 m/s and trust me this is way to fast for this game. But that is up to you. Now 1,000 M/S felt good to me, and that set the top speed of the warp drive to around 1,084 M/S