You will see different losess on different dynos as it depends how the dyno is calibrated to read, ours is calibrated to read at the flywheel and there were 2 standard cars on the road on Saturday one did 146.5 the other 147. You will see different dynos achieving this result in different ways i.e. 6+4 = 10 or 7+3 = 10 the result is still 10.
As a further example of this, my Corsa when standard did 195 on Stephans dyno in Germany, but did 172 at the wheels./ On our dyno the day before it did 194.1 at the fly, however our dyno put it at 156.7 thats loss of 37.4
Another point to consider and further confuse everyone is that the figure shown on our dyno when we are running is the power at the wheels but this is uncorrected to both barometric pressure and air temp.
When ever you talk to various dyno manufacturres about this they all think there way is the correct way. :roll:
However the differance between mine and Stephans dyno and the make of them, confirms that allthough they read the wheel figure differently and the loss's, they both agreed on the calculation to the flywheel .
The point I guess is that it is almost impossible to compare one dyno with another, given that a big differance is also going to be air flow from the fans, not to mention the biggest variable of all the operator
I hope this has helped rather than confuse you further.. :?
Jon