[matejdro]

Is there any way to modify speed of player or vehicles?

[Kar]

yep in your gtasa files you can modify your vehicle speed.

i cant remember about players but you need to download the sa handling tool to edit the gta files btw or your effed.

[matejdro]

Yes but i want to modify it from server. So everyone gets faster stuff.

[John_F]

setvehiclevelocity sets the speed of a vehicle
wiki:
https://sampwiki.blast.hk/wiki/SetVehicleVelocity

A nice way to make vehicles faster is to do something like:

OnPlayerUpdate:
if the player is in a vehicle
get the players vehicle
get the vehicles velocity
then, set the vehicles velocity to some number more than what it currently is.