Best engine speed to upshift for indian petrol cars

zenx · 17th December 2005, 19:00

OHC 1.3 3-4k usually - and 5+ when its time for OHCing

tsk1979 · 18th December 2005, 09:20

@.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

LandCruiser · 18th December 2005, 09:43

I always felt that one has to upshift quick and downshift late for better FE. is this right?

normally_crazy · 18th December 2005, 12:03

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 !

Vish_Janu · 18th December 2005, 19:59

i think its 2500-3500

theEnd · 19th December 2005, 13:11

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.

quicksilver · 19th December 2005, 13:19

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.

5u3zEr0 · 19th December 2005, 13:25

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.

Abhay · 19th December 2005, 13:32

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!)

narasimha raju · 19th December 2005, 14:22

I normally shift gears at 1800-2000 RPM

.anshuman · 19th December 2005, 18:53

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.

swathyd · 4th April 2007, 01:17

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.

View Poll Results: which is the best point to upshift for best efficiency?
1000-2000rpm	9	15.79%
1500-2500rpm	30	52.63%
2000-3000rpm	12	21.05%
2500-3500rpm	6	10.53%
Voters: 57. You may not vote on this poll

17th December 2005, 19:00	#16
zenx Senior - BHPian Join Date: Oct 2004 Location: Bangalore Posts: 1,161 Thanked: 158 Times View My Garage	OHC 1.3 3-4k usually - and 5+ when its time for OHCing
	() Thanks

18th December 2005, 09:20	#17
tsk1979 Team-BHP Support Join Date: Feb 2005 Location: San Jose, CA Posts: 23,717 Thanked: 22,825 Times View My Garage	@.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
	() Thanks

18th December 2005, 09:43	#18
LandCruiser BHPian Join Date: Jul 2005 Location: Chennai Posts: 712 Thanked: 51 Times View My Garage	I always felt that one has to upshift quick and downshift late for better FE. is this right?
	() Thanks

18th December 2005, 12:03	#19
normally_crazy Senior - BHPian Join Date: Feb 2004 Location: Mumbai Posts: 4,369 Thanked: 528 Times View My Garage	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 !
	() Thanks

18th December 2005, 19:59	#20
Vish_Janu BHPian Join Date: Sep 2005 Location: New Delhi Posts: 250 Thanked: 376 Times	i think its 2500-3500
	() Thanks

19th December 2005, 13:11	#21
theEnd BHPian Join Date: Nov 2005 Location: Bombay Posts: 534 Thanked: 6 Times View My Garage	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.
	() Thanks

19th December 2005, 13:19	#22
quicksilver BHPian Join Date: Oct 2005 Location: Coimbatore Posts: 455 Thanked: 12 Times View My Garage	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.
	() Thanks

19th December 2005, 13:25	#23
5u3zEr0 BHPian Join Date: May 2005 Location: Madras Posts: 379 Thanked: 3 Times	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.
	() Thanks

19th December 2005, 13:32	#24
Abhay BHPian Join Date: Apr 2005 Location: Pune Posts: 727 Thanked: 11 Times	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!)
	() Thanks

19th December 2005, 14:22	#25
narasimha raju BHPian Join Date: Sep 2005 Location: Hyderabad Posts: 128 Thanked: 54 Times	I normally shift gears at 1800-2000 RPM
	() Thanks

4th April 2007, 01:17	#27
swathyd BHPian Join Date: Mar 2007 Location: thiruvananthapuram Posts: 774 Thanked: 25 Times	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.
	() Thanks