How is Cubic Capacity Related To BHP of Engine?
- Thread Starter kenlitting
- Start date
The Indica Vista Quadrajet uses the same engine as the Manza, Ritz Diesel and Swift Diesel. It has a variable geometry turbo.
Etios Liva Torque curve:
Yes, as I said the peak torque value is at 2000rpm, which is often not ideal in city driving.
Can you describe the lag more? (ie. at what road and engine speeds, gradient, etc.)
Etios Liva Torque curve:
Yes, as I said the peak torque value is at 2000rpm, which is often not ideal in city driving.
Can you describe the lag more? (ie. at what road and engine speeds, gradient, etc.)
Thread Starter
#18
As far as i know the old 75bhp indica vista uses fgt turbo charger but VISTA D90 and manza have vgt
Especially when we slow down in 2nd gear at a speed breaker and after passing the same, when we want to accelerate it doesn't support well(same in Ford Figo too) where as this I have not found when driving a Amaze or Etios Liva diesels
Oh, that is just down to little torque below 2000rpm. I have the same problem with my naturally aspirated 1.0l Petrol Estilo, which has peak torque at 3000rpm and not much below that engine speed.
The Vista 1.4l TDi is the one with FGT.
The Vista 1.2l Quadrajet 75 has a VGT.
Please refer for model info: http://cars.tatamotors.com/tatavista/downloads/VistaTech_Brochure.pdf
The Vista 1.4l TDi is the one with FGT.
The Vista 1.2l Quadrajet 75 has a VGT.
Please refer for model info: http://cars.tatamotors.com/tatavista/downloads/VistaTech_Brochure.pdf
Friends, do you have the power / torque graphs for petrol run Ritz. What you think of low end torque of petrol Ritz?
This is not felt by me in my petrol car,but I am still not so experienced as friends of this thread.
I give you a practical scenario. My family in Innova (engine 2.5L, max. power output of 100.6 bhp@3600rpm and max. torque 200Nm@1400-3400rpm) & My friend's family in Renault Duster (engine 1.5L, 108.5bhp@3900rpm & 248Nm@2250rpm) gone to Rajasthan last vacation. Steep climb to chetak memorial at Haldighati was easily managed at one stance by me, while my friend more experienced in driving than me, was not only not able to climb road to hill, rather car was going back in spite of much engine revving. So ultimately we had to put rock behind both rear wheels & then car was able to climb up the road. So my question to technical experts, inspite having better power & torque (& less engine capacity), why Duster was lagging behind. Any technical explanation?
Hi Dhoom9,
The reasons can be
*I believe Innova is a RWD where as Duster is FWD(Correct me if I'm wrong). When It comes to climbing a steep road. RWD performs much better than a FWD vehicle especially when the vehicle is fully loaded.
*Innova First gear ratio 3.928, Final drive ratio 3.909, Tire 205/65/15
Duster First gear ratio 3.74, Final drive ratio 4.44, Tire 215/65/16
(The values are got from google search, so correct me If I'm wrong.)
-From the above specs its very clear that Innova can beat duster in the case of climbing steep roads. Duster is more tuned to get higher mileage and better topspeed.
*Did they had any wheel spin while trying to climb up? Or its just hesitating to move forward? If it was spinning then its quite usual for a fully loaded FWD vehicle especially if the air pressure inside the tire is high(higher PSI reduces the grip)
Hi kenlitting,
Actually CC is not the only thing which is related to the BHP of an engine.
*It depends on the compression ratio of the engine.
-A high Compression Ratio allows an engine to extract more mechanical energy from a given mass of air-fuel mixture due to its higher thermal efficiency.
*It depends on whether the engine is under-square or over-square.(Bore vs stroke)
- An undersquare engine(Bore < Stroke) can produce strong torque at low to mid range rpms because of the its longer stroke.
- An oversquare engine(Bore > Stroke) allow to run at higher rpm hence the power does not suffer.
Regards.,
Kiran.
The reasons can be
*I believe Innova is a RWD where as Duster is FWD(Correct me if I'm wrong). When It comes to climbing a steep road. RWD performs much better than a FWD vehicle especially when the vehicle is fully loaded.
*Innova First gear ratio 3.928, Final drive ratio 3.909, Tire 205/65/15
Duster First gear ratio 3.74, Final drive ratio 4.44, Tire 215/65/16
(The values are got from google search, so correct me If I'm wrong.)
-From the above specs its very clear that Innova can beat duster in the case of climbing steep roads. Duster is more tuned to get higher mileage and better topspeed.
*Did they had any wheel spin while trying to climb up? Or its just hesitating to move forward? If it was spinning then its quite usual for a fully loaded FWD vehicle especially if the air pressure inside the tire is high(higher PSI reduces the grip)
Hi kenlitting,
Actually CC is not the only thing which is related to the BHP of an engine.
*It depends on the compression ratio of the engine.
-A high Compression Ratio allows an engine to extract more mechanical energy from a given mass of air-fuel mixture due to its higher thermal efficiency.
*It depends on whether the engine is under-square or over-square.(Bore vs stroke)
- An undersquare engine(Bore < Stroke) can produce strong torque at low to mid range rpms because of the its longer stroke.
- An oversquare engine(Bore > Stroke) allow to run at higher rpm hence the power does not suffer.
Regards.,
Kiran.
Thanks for the explanation. I think this will help others a lot to understand their car in terms of engine capacity / power / FWD/RWD, highway or offroading.
I remember front wheels were spinning yet car was dragging behind ( driver was only one passenger but some luggage in boot).
I remember front wheels were spinning yet car was dragging behind ( driver was only one passenger but some luggage in boot).