download the chiefwiggum v1.1 aswell over and install it ( overwrite it over the v1.0 original version )
this contains
new engine model (powershifting, overrevving and insufficient cooling
will now blow up the engine within a couple of laps)
this is how engines were and should be made but most physics makers lag of or simply forget and make them of concrete like they are LE... even for Historic mods!