Cheap upgrade or false economy?

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I used to have a tuning box from KCR in my 1999 E220 CDI. Took it from 125 hp to 150 hp. And got a decent increase in torque. My car did not improve fuel consumption as they claim, but alltogether I was quite satisfied even though cars that have been tuned by reprogramming the ECU have a better characteristics when it comes to power / RPM. The box that I had was good on lower rpm's, but did not give as much over 3000 rpm's.

A friends E220 CDI who had it tuned by programming is a bit quicker than mine was.


Steinar
 

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