How to increase Torque ?

eagle_f1 · 30th November 2006, 23:06

We have discussed about increasing BHP (performance) by installing parts like air filters, free flow exhaust, etc. in various threads here but I wanna know if there is any way to increase TORQUE in a 2 wheeler or a 4 wheeler. So guys please help.

theMAG · 1st December 2006, 00:26

Gearing, ECU remapping, increasing the bore, modify the exhaust/intake system, increase the length of the stroke are some ways to increase torque. These are all highly technical to execute and needs thorough expertise, the quality of which is not easily available except with rally tuners. Increasing HP is therefore the more widespread of performance practises.

Beyond a certain level, excess torque results in excess wheel spinning, and therefore is quite useless beyond this level.

Shan2nu · 1st December 2006, 10:33

Torque is dependant on the intensity of air-fuel mixture burnt, compression pressure of the engine and it's cubic capacity.

BTW, there's no such thing as excess torque. Gear ratios can be altered to increase or reduce the torque reaching the wheels depending on traction levels.

Shan2nu

jkdas · 1st December 2006, 10:46

just curious, for which vehicle?

cbr1000f · 1st December 2006, 11:12

Heavier Flywheels. ?

Shan2nu · 1st December 2006, 12:01

Quote:

Heavier Flywheels. ?

That wont help increase torque.

Using a short bore and long stroke will help improve torque at the flywheel.

Shan2nu

jat · 1st December 2006, 14:53

Whenever you are increasing BHP, you not increasing the working rpm. You are actually increasing the torque (except when you are changing the gear box)

Shan2nu · 1st December 2006, 15:20

Quote:

Whenever you are increasing BHP, you not increasing the working rpm. You are actually increasing the torque (except when you are changing the gear box)

I didn't get what you're trying to say.

Shan2nu

theMAG · 1st December 2006, 15:38

Quote:

Originally Posted by Shan2nu

Torque is dependant on the intensity of air-fuel mixture burnt, compression pressure of the engine and it's cubic capacity.

BTW, there's no such thing as excess torque. Gear ratios can be altered to increase or reduce the torque reaching the wheels depending on traction levels.

Shan2nu

Thats what I meant, perhaps in a too-short single statement

fieroid · 1st December 2006, 15:55

increasing torque
by oversizing,
cam profiling,
shorter gearing,
inceasing exhaust backpressure
get a DI diesel man. That'll make more sense.

Shan2nu · 1st December 2006, 17:45

Quote:

inceasing exhaust backpressure

Not true. Though people would belive so, the fact is that the engine performs better when there's min back pressure.

Increasing back pressure puts more load on the engine.

Shan2nu

Psycho · 1st December 2006, 18:14

Quote:

Originally Posted by Shan2nu

That wont help increase torque.

Using a short bore and long stroke will help improve torque at the flywheel.

Shan2nu

Heavier flywheels do help increasing torque

Shan2nu · 1st December 2006, 19:08

Quote:

Heavier flywheels do help increasing torque

How exactly does that work out? And if it did, wouldn't the heavier flywheel require more torque for it to be turned?

Does the torque really increase or is it just being produced at a lower rpm?

Shan2nu

Mpower · 1st December 2006, 20:24

If you are looking for torque, there is no replacement for displacement.

finetuning · 1st December 2006, 20:29

With heavier flywheel we are increasing the mass(weight) hence after certain momentum it keeps rotating with increased inertia so this increases torque with is nothing but the rotational motion.......we do feel slight sluggishness at inital run up.....stock flywheel is the balance of both...not too heavy & not too light.....

Also increasing the back pressure have adverse effect on engine....infact it increases load on engine.....because engine has to overcome this pressure during exhaust stroke.........

Anything which improves combustion is the key apart from changing parts of engine...once we take care of combustion process there after other parts can be taken care of like flywheel.......

Enjoy.....

30th November 2006, 23:06	#1
eagle_f1 BHPian Join Date: Dec 2004 Location: Bangalore Posts: 142 Thanked: 13 Times View My Garage	How to increase Torque ? We have discussed about increasing BHP (performance) by installing parts like air filters, free flow exhaust, etc. in various threads here but I wanna know if there is any way to increase TORQUE in a 2 wheeler or a 4 wheeler. So guys please help.
	() Thanks

1st December 2006, 00:26	#2
theMAG Distinguished - BHPian Join Date: May 2006 Location: Avon, CT Posts: 7,196 Thanked: 1,821 Times View My Garage	Gearing, ECU remapping, increasing the bore, modify the exhaust/intake system, increase the length of the stroke are some ways to increase torque. These are all highly technical to execute and needs thorough expertise, the quality of which is not easily available except with rally tuners. Increasing HP is therefore the more widespread of performance practises. Beyond a certain level, excess torque results in excess wheel spinning, and therefore is quite useless beyond this level.
	() Thanks

1st December 2006, 10:33	#3
Shan2nu Senior - BHPian Join Date: Feb 2004 Location: Hubli - Karnata Posts: 5,533 Thanked: 127 Times View My Garage	Torque is dependant on the intensity of air-fuel mixture burnt, compression pressure of the engine and it's cubic capacity. BTW, there's no such thing as excess torque. Gear ratios can be altered to increase or reduce the torque reaching the wheels depending on traction levels. Shan2nu
	() Thanks

1st December 2006, 10:46	#4
jkdas Senior - BHPian Join Date: Sep 2005 Location: Thiruvananthapu Posts: 9,687 Thanked: 1,496 Times View My Garage	just curious, for which vehicle?
	() Thanks

1st December 2006, 11:12	#5
cbr1000f BHPian Join Date: Sep 2005 Location: Mumbai. Posts: 148 Thanked: Once View My Garage	Heavier Flywheels. ?
	() Thanks

1st December 2006, 14:53	#7
jat BHPian Join Date: Dec 2005 Location: SINGAPORE Posts: 266 Thanked: 7 Times	Whenever you are increasing BHP, you not increasing the working rpm. You are actually increasing the torque (except when you are changing the gear box)
	() Thanks

1st December 2006, 15:55	#10
fieroid BHPian Join Date: Mar 2005 Location: bangalore Posts: 706 Thanked: 306 Times	increasing torque by oversizing, cam profiling, shorter gearing, inceasing exhaust backpressure get a DI diesel man. That'll make more sense.
	() Thanks

1st December 2006, 20:24	#14
Mpower Senior - BHPian Join Date: Mar 2005 Location: Bangalore Posts: 10,399 Thanked: 1,735 Times View My Garage	If you are looking for torque, there is no replacement for displacement.
	() Thanks

1st December 2006, 20:29	#15
finetuning BHPian Join Date: Mar 2006 Location: Mumbai Posts: 394 Thanked: 20 Times	With heavier flywheel we are increasing the mass(weight) hence after certain momentum it keeps rotating with increased inertia so this increases torque with is nothing but the rotational motion.......we do feel slight sluggishness at inital run up.....stock flywheel is the balance of both...not too heavy & not too light..... Also increasing the back pressure have adverse effect on engine....infact it increases load on engine.....because engine has to overcome this pressure during exhaust stroke......... Anything which improves combustion is the key apart from changing parts of engine...once we take care of combustion process there after other parts can be taken care of like flywheel....... Enjoy.....
	() Thanks