This relates to Spud's horror at HJ's treatment of the Yaris diesel.
All of the Road Tests I read on the new breed of high performance turbo diesels stress the huge amount of torque available at very low revs. They emphasise that a new driving technique is required for rapid progress and stress the need to change gear early at the peak of the torque curve.
Has anyone got any statistics on the difference in performance, say 0-60mph and overall economy, between taking it to the red line in each gear and changing gear at 2000-3000rpm.
C
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No, I have no stats but I have some experience.
I have an MG ZR-TD fitted with a TuningBox. This unit ups the power by 25BHP and sees a huge rise in torque.
There is no point in revving a diesel past its torque peak; industrial engines have a torque peak of 1500-1800RPM, trucks are a good example of this.
I find it best to change up just past the max torque peak; this appears to cointribute towards good fuel consumption, too.
The saying 'With a Diesel, use the available Torque and forget the power' rings very true
MG-Rover Questions? Click on www.mg-rover.org
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Can you give some more details about your TuningBox? I have a 530d and I am not 100% happy with the power delivery as it is a little uneven. What benefits do you get and is there any risk to your gearbox being damaged with the increase in torque?
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