The V10 S8's have 2 exhaust valves which open at higher rpm in sports mode.
On the R32's they also have these. So after a bit of testing today, the difference is the S8 valves open at higher RPM, where the R32 valves close at higher rpm. So we can't just pull the vacuum hoses as they are by default shut.
So with a small amount of wire i've held them open.
Sounds superb!! Very impressed
Cost about 10p in wire.