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View Poll Results: which is the best point to upshift for best efficiency?
1000-2000rpm 9 16.07%
1500-2500rpm 29 51.79%
2000-3000rpm 12 21.43%
2500-3500rpm 6 10.71%
Voters: 56. You may not vote on this poll

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Old 17th December 2005, 19:00   #16
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OHC 1.3 3-4k usually - and 5+ when its time for OHCing
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Old 18th December 2005, 09:20   #17
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@.anshuman. There is no single speed. You see it depends where the max torque is produced. Indica produces max torque at around 2000rpm. So the best rpm to shift up is 2000rpm. That translates to

1-2 15kmph
2-3 25kmph
3-4 40kmph
4-5 55-60kmph
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Old 18th December 2005, 09:43   #18
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I always felt that one has to upshift quick and downshift late for better FE. is this right?
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Old 18th December 2005, 12:03   #19
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According to the little experience i have driving petrol and diesel cars -

Petrol - 2000 ~ 2500 RPM , closer to 2000 will help

Diesel - 1800 ~ 2500 RPM , closer to 1800 helps

I may be wrong - but what the heck with the kind of FE i get i dont wanna think about anything else !
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Old 18th December 2005, 19:59   #20
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i think its 2500-3500
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Old 19th December 2005, 13:11   #21
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around 2500 sounds resonable, except maybe in 1st (3000). Of course since my Ikon already has terrible FE but sounds really nice, on open roads I upshift at about 5000.
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Old 19th December 2005, 13:19   #22
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Default OHC 1.5 - 16 KM/L with A/C

I normally shift at around 2000-2500 RPM and every once in a while rip it upto the point where the Rev Limiter kicks in (around 7000-7500 I think... will check it next weekend )

But for FE, I have seen the quicker you upshift, the better FE you get... so when I am not on a high, I shift at 2000 RPM. Sometimes I find myself doing 40 KM/H on 5th gear, but thats about less than 5% of my overall driving.
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Old 19th December 2005, 13:25   #23
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I think this is a car centric issue. It will be different for different cars but if I have to generalise it would be 1500rpm to 2500rpm.
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Old 19th December 2005, 13:32   #24
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Depends on the car surely but roughly 2k-2.2k rpm should be okay I think
This is for normal city driving of course...I tend to shift up (petrol Indica) near to 1.8/2k while driving and if I am really going slowly near to 1.5k (thesedays quite often due to the traffic, I have found out if I drive slowly it keeps my bp down!)
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Old 19th December 2005, 14:22   #25
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I normally shift gears at 1800-2000 RPM
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Old 19th December 2005, 18:53   #26
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Quote:
Originally Posted by tsk1979
@.anshuman. There is no single speed. You see it depends where the max torque is produced. Indica produces max torque at around 2000rpm. So the best rpm to shift up is 2000rpm. That translates to

1-2 15kmph
2-3 25kmph
3-4 40kmph
4-5 55-60kmph
i know that,i dont have a tachometer in my indica so i shift according to the engine sound and i am a master in it ,for my accent gls i use the tachometer and i shift at 2.5k rpm,these days i am experimenting with mileage,this weekend on my trip back from hisar to delhi,i got ~28.7kpl,my indica consumed 3.3litres for 96kilometers of very cautious highway drive,and nobody will beleive me even i didnt believe it,i had a buddy with me i asked him to calculate it from scratch,confirmed after shaking the car that the diesel was filled till cap,i used turbojet diesel and later tanked up at a reliance petrol pump at bahadurgarh,my previous best was 25.86kpl,only Rs.102 for 96kms 2 people in car , someday this car will make me go crazy,next time ill try my accent.

Last edited by .anshuman : 19th December 2005 at 18:56.
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Old 4th April 2007, 01:17   #27
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It cant be proved like this as it depends on circumstances rather than technical or fe issues. But in 5 th you should be driving below 2500 rpm.
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