Is it possible to disable the Gcode output from including F movement speed in Cura?

Or instead of a fixed movement speed, a % of the machines programmed speed?

I’m using a home built pruiser V2 with a BBB + replicape running on octoprint.
My issue is that I can set all of my steps per mm and movement speeds in octoprint, and everything works. However as soon as I import a Gcode from Cura the F movement code overwrites everything, and I get one movement speed for my X Y and Z axis and E speed, even though my Z needs many more steps per mm and much less speed. Also on some prints where I have told Cura to print slow my extruder also pushes filament through slow, which causes blockages and less printed on the bed, where as if I print fast I get way too much filament.