had my old corsa c years ago.took the middle section of that and had it rolling roaded and it pulled 84bhp but the manufacturer said it was 75bhp for the 1.2 petrol.
rolling roads are not an accurate way of measuring cars power, they operate on guesswork alone and the most minor variables even change in air pressure from day to day can cause + or - 10bhp of what the car is running.
If you would have taken the car there standard it probably would have made the same.
Well it seems a bit more powerful but then that could be because the old back box was so made out of rust it simply fell apart. It certainly sounds better mind!
