Performance Curve: Analysis & Optimization

'What do you think of this curve? It's so uneven. Unfortunately, I don't have a scanner, otherwise I would have scanned the original. This was taken on a dynamometer from World War II in the 5th gear, which is why there's no torque reading. It was just a free test, so I checked it out. What could be causing these power drops?'

Engine: AFN 110hp / Chip tuning / 63.5mm turbocharger (Group A) / Viper cold air intake / No catalytic converter / Boost pressure: 1.2 bar.

I'm sorry, I don't understand. Can you please provide the text you would like me to translate?

http://pics.tdiclub.com/members/tdinapkin/WheelHP.xls

Hi.

I would most likely interpret these vibrations as an exaggerated form of the boost pressure regulation process.

Either it's due to a malfunctioning VTG (Variable Turbine Geometry), or possibly due to faulty chip tuning that has messed up the control characteristics.

I think the chip is probably crap, just really bad.