Originally Posted by viju
Just one last question. This may sound stupid
but I can't stop my excitement to know things with diesel. Once I put first gear in diesel to start the car, at what RPM should I shift to second. Correct me if I am wrong the turbo gets active in 1500 to 3000 RPM and the first gear in diesel is short. But still wanted to know.
See buddy the turbo gets active between 1500 to 2000 rpm in most of the cars.Now,how to use turbo and when to shift is the question,so here is my answer:-
Although Mukesh has already stated the right gearing so let me explain it different way:- In city driving:
In the slow moving traffic of city,let the torque do its job and drive with very light foot.This way turbo will not come to life but your drive will be great.While for sudden bursts of acceleration,just shift down,and revv up.Rest all will be done by the turbo itself. Highways drive:
If you drive sedately then you can easily do without turbo too and if you like to drive at moderate speeds then follow this rule:-
Start,push till 2500-2800 rpm in any gear and shift up and follow the same.This way your turbo will remain active and will give you enough power whenever required without waiting for even a second. High speed highway or hilly drives:
The turbo is used at its best while climbing uphills with full load or at high speed highway drives when you need some more power.
On the highways you can easily do long shift and can use just one gear from 60 kph to 160 kph in the Ritz but on the hilly inclines everything changes drastically.There you need to keep your car in powerband throughout the way in the incline else your car will bog down despite being a diesel too.
There is a simple rule in this case:-
Engage first gear and pull till 3500-4000 rpm in it and then shift up and follow the same till 5th gear.This way your car will remain above 3000 rpm in any gear and hence you will get good power on highways and on the hilly inclines too.And if by any chance rpm goes below 2500 then shift down.This practice works best on hills and I have climbed my Corolla(by carrying the momentum) to the places where even SUV owners put their heads on the wheel.
I hope now you have got it..
Similarly if you want to check the top speed of any car then also follow this technique:-
From the second gear itself start pushing the engine till the redline and keep on shifting up.And let the car take its time to do it int he 3rd and 4th gear.And after touching redline or the top rev limit car can reach in 4th gear then engage the fifth.
Else if you push in the fifth itself then you can never reach the true top speed of your car,instead you will end up touching at least 10 kph lesser than what you would have touched by pushing from the lower gears.