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-   -   purpose of tachometer (https://www.team-bhp.com/forum/technical-stuff/13131-purpose-tachometer.html)

i heard the tachometer should be used to help in the gerashifting at 2000rpm ,can anybody exlain it in detail.

Jagjeet,

To get maximum fuel efficiency,a car has to be driven in certain ways.



The general guideline is to shift earlier rather than later.



The tachometer essentially helps to shoot for a target of about 1500 to 2000 RPM in the next gear, when accelerating gently. This is especially true for diesels where the torque band peaks at lower RPM than in petrol engines.



Remember that, the engine's efficiency is greatest at near to its maximum torque speed, which is usually half to two thirds of it redline rpm.



Hope this helps

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http://www.team-bhp.com/forum/techni...uired-car.html

Thanks Condor

Btw this is a two year old thread & the one you quoted is three years old :)

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