Originally Posted by
turbotoaster
What the OP is saying is that you really should be able to go to any dyno and them be comparable, im not saying exact numbers but not 10-15% out, 1-3% i think is fair...even at 3% on his engine thats 16bhp out
Not sure if you was on here when Spadge was but he took his car to 2 rolling road shoot-outs in one weekend.
On the saturday at EA his car made 485bhp (i think it was)
On the Sunday at another set of rollers it made about 445bhp
Either way he had a 40bhp difference with just a change of rollers so i'd say there is quite a variation with different rollers against each other