Update...
Went to have a dyno run with the nitrous today. The guys were very helpful and one of the operators has nitrous for his car, so I was in safe hands. It was a Dyno Dynamics "pessimistic" set of rollers at RS Tuning in Leeds. I chose their dyno specifically as they are just about the lowest (as most consider) that are near enough to me who I trust to dyno it correctly.
So, below is a pic of how they had to strap it down. They said strapping down this way loses 2-3% as it pulls the wheels so hard down into the rollers
Here's the bit you've all been waiting for...
438.7hp and a peak torque of 510 lbft on nitrous
339.8hp and peak torque of 381lbft without nitrous.
The settings are less agressive for the dyno than on the road as the nitrous wasn't even set to start until 3200rpm.
Absolutely no sign of slip on the DSG box and AFR's on nitrous were a solid, held 11.5.
Interesting for me is that my torque on nitrous is as high at 6000rpm as the peak without nitrous. Also I'm making more power at 3500rpm on nitrous than my peak power without.
This is a REALLY impressive modification and it would be interesting to compare it to say, the GT2871R that I was thinking of fitting.
