Re: The next step
I had the same experience.
You will find the torque curve follows the boost curve. If you can get another graph of it done ( boost ) or get one of Simons graphs he has done, have a squiz. You will see the boost smashes near vertical, then peters down. Identical to your torque curve and identical to how it drives on the road. Fairly peaky to drive isn't it? Roars up to 4000rpm.. If you mash the pedal @ 4000 rpm, there aint much left in the tank.
If boost gets held for longer, you find the power holds it's 'tail' up on the graph too, with peak power arriving a bit later in the rpm range and your torque curve being more linear.
A fat, linear torque curve demonstrates a V8 with very linear power delivery, as you would have seen on every XR8 or SS on the dyno. Steady torque curve, steady power curve, steady acceleration!!!!
In a National comp I doubt it wasn't tied down properly. They had mine rock steady @ 300rwkw with knackered tyres. They have the tie down points in the centre of the dyno too.. different day, hot weather, who knows??
Still, 800 Nm is not to be sneezed at!!
Fasta than a Speeding Banana