Monthly Archives: July 2020

Torque and power are only proportional at the same point in the rev range. For any given engine, the quoted torque and power outputs are peak values, ie the highest torque value and the highest power value regardless of RPM. 

I have annotated a dyno graph of a 1.7 CRDi below, just as an example.

The blue solid line is the torque curve with the Bluespark box fitted, the blue dashed line is the power curve with the Bluespark box fitted.

The red solid and dashed lines are stock torque and power respectively.

The green circle highlights the point of peak power, and the orange circle highlights the point of peak torque:
 

I could (if I wished) make a file that would give identical gains to the above prior to 2500RPM, tailing off to zero gains (matching back to the red lines) by 3000RPM. That would give the same peak torque gain and zero peak power gain. 

Conversely I could make a file that was exactly as the stock (red dotted) plot is, with a gradual increase from 3000RPM