Hi Dyno people, I have one question, I have a dyno with 44″ roll, and water brake, I have this problem :

I test a Honda K20z3 the car test in my dyno and I have 225 Hp, I change a engine for K20A Type R, the power and torque curves are the same, I improve the two lines and the graphics are identicals, I test the car in the truck but with K20A the car is to fast about 10 km/h in end speed and 2 seconds for lap, the question is why if the two lines for two engines are identicals , the car is more fast?

I test a power only with inertial mode,

please help me.