just tried twice to use dev mod, but I do not have any engine sound ... only environment sound, but no car engines sound maybe a setting ? I am not expert in dev mod
If you use an existing Mod that comes from the Installed Subfolder, you simply can put it's Sound MAS File into the DevMode Folder of the Car. If you have loose Sound Files, you can package them into a MAS Files and do the same as described above or you can put them as loose Files, into the correct ModeDev\Sounds Subfolder. That has to be done by checking the Path in the Mods Sound (*.SFX) File. Open it with a Text Editor and check the Path Entries. Here is an Example from the SkipBarber: An Entry from the Sound File: VS_INSIDE_POWER_ENGINE_1=1.3,SkipBarber\skipb_in_onidle.wav The Path is marked in bold and it is SkipBarber\ So for this Car, you would have to create a Subfolder SkipBarber in the Folder ModDev\Sounds, that it look like this ModDev\Sounds\SkipBarber And then you put the Cars Sound Files into that new Folder.