hi mate
bara has all the rights to VC (lock stock barrel) , he can uprate any VC mits/subaru/cossie/viper basically any car that uses a Viscous Coupling and it will be done right as he has a dyno to measure the right Nm's
obvisouly with the standard plates you can only uprate them so far
heres an example a 7.5" cossie rear V.C can be done to 240Nm no problem at all with the standard plates (25Nm standard when new)
lets say if you wanted a 300 -400Nm uprated VC then plates would have to be changed for the Nickel plates which can take alot more pressure/flex alot of people go this route on the rally cars lose surface
cheers marco