Can someone explain torque steer?
24-02-2005, 06:37 PM
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Can someone explain torque steer?
well, what is it, I know it's all down to drive shaft lengths, LSD's, tie bars/comp. strutts and power etc, But how does it all work, and why do RS turbos have it really bad?
24-02-2005, 06:42 PM
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as far as I know torque steer is where one wheel is turning faster than the other so it will drag you to one side of the road and LSD stops this from happening by evening out the power to both wheels... But could be wrong there 
24-02-2005, 06:46 PM
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and LSD stops this from happening by evening out the power to both wheels...
To add to the topic:
Torque Steer, theories for causes of:
(1) It's because the longer one is less stiff torsionally. Torque applied at the engine end is resisted by the torque at the wheel end, but sudden application of more engine torque winds the shaft up slightly (like a rubber band), driving the car sideways.
Or...
(2) Basically, it is to do with the different angles that the driveshafts make with the horizontal. When they accelerate, they gain rotational momentum, and if they are at different angles, then there is a net force... it is very strange.
(1) It's because the longer one is less stiff torsionally. Torque applied at the engine end is resisted by the torque at the wheel end, but sudden application of more engine torque winds the shaft up slightly (like a rubber band), driving the car sideways.
Or...
(2) Basically, it is to do with the different angles that the driveshafts make with the horizontal. When they accelerate, they gain rotational momentum, and if they are at different angles, then there is a net force... it is very strange.
24-02-2005, 06:46 PM
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now I know that an rst LSD aint the best ever, but if you were to upgrade to ATB or simaler will it cancel it out? if a car has equal drive shafts will it not exist then?
24-02-2005, 06:48 PM
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Originally Posted by Billabong
and LSD stops this from happening by evening out the power to both wheels...
To add to the topic:
Torque Steer, theories for causes of:
(1) It's because the longer one is less stiff torsionally. Torque applied at the engine end is resisted by the torque at the wheel end, but sudden application of more engine torque winds the shaft up slightly (like a rubber band), driving the car sideways.
Or...
(2) Basically, it is to do with the different angles that the driveshafts make with the horizontal. When they accelerate, they gain rotational momentum, and if they are at different angles, then there is a net force... it is very strange.
(1) It's because the longer one is less stiff torsionally. Torque applied at the engine end is resisted by the torque at the wheel end, but sudden application of more engine torque winds the shaft up slightly (like a rubber band), driving the car sideways.
Or...
(2) Basically, it is to do with the different angles that the driveshafts make with the horizontal. When they accelerate, they gain rotational momentum, and if they are at different angles, then there is a net force... it is very strange.
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24-02-2005, 06:51 PM
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Originally Posted by andyescos
now I know that an rst LSD aint the best ever, but if you were to upgrade to ATB or simaler will it cancel it out? if a car has equal drive shafts will it not exist then?
24-02-2005, 06:56 PM
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Originally Posted by andyescos
Originally Posted by Billabong
and LSD stops this from happening by evening out the power to both wheels...
To add to the topic:
Torque Steer, theories for causes of:
(1) It's because the longer one is less stiff torsionally. Torque applied at the engine end is resisted by the torque at the wheel end, but sudden application of more engine torque winds the shaft up slightly (like a rubber band), driving the car sideways.
Or...
(2) Basically, it is to do with the different angles that the driveshafts make with the horizontal. When they accelerate, they gain rotational momentum, and if they are at different angles, then there is a net force... it is very strange.
(1) It's because the longer one is less stiff torsionally. Torque applied at the engine end is resisted by the torque at the wheel end, but sudden application of more engine torque winds the shaft up slightly (like a rubber band), driving the car sideways.
Or...
(2) Basically, it is to do with the different angles that the driveshafts make with the horizontal. When they accelerate, they gain rotational momentum, and if they are at different angles, then there is a net force... it is very strange.
24-02-2005, 08:04 PM
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I would say that torque steer in a FWD car is more about weight transfer. When let's say the right side wheel has more weight on it, it will make it pull better. This makes the car steer left, thus making the car lean to the right. This again makes the right weel have more weight,... A high amount of negative camber will make this stronger, which is especially the case in lowered Escort RSTs.
Tuning the front shocks heavier and increasing the front tire pressure will help in this.
Tuning the front shocks heavier and increasing the front tire pressure will help in this.
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24-02-2005, 08:51 PM
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I'll give it a shot.....
Its probably safe to assume that the driveshafts are made from the same material from side to side, so they will twist the same per unit length.
So, since one is longer than the other, the longer one will twist more. The bigger the difference in length, the worse the torque steer (unless they use different materials side to side.
Its probably safe to assume that the driveshafts are made from the same material from side to side, so they will twist the same per unit length.
So, since one is longer than the other, the longer one will twist more. The bigger the difference in length, the worse the torque steer (unless they use different materials side to side.
24-02-2005, 09:23 PM
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I would hve to agree with the American 
its down to length, and twist I think.
For instance my mates Civic VTI has FWD, but has equal lenght driveshafts and has absolutly no torque steer
its down to length, and twist I think.For instance my mates Civic VTI has FWD, but has equal lenght driveshafts and has absolutly no torque steer
24-02-2005, 11:17 PM
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When I had my Fiesta RS Turbo Ahmed B and Ian Howell (Fiesta Frenzy) developed some adjustable fully rose jointed lower arms. After fitted them my torque steer was near on eliminated!! and that was tried with a standard gearbox, a gearbox with LSD and a Gearbox with ATB diff. How its worked I haven't a clue but the difference it made in my launching was amazing!
25-02-2005, 02:32 AM
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Making sure the steering axis goes through the middle of the tyre contact patch tends to get rid of most of the torque steer, so this is probably what has happened in your case.
The hotter versions of various FWD cars tend to use wider front tyres but still have to get them to fit within the same wheel arches, so the steering axis no longer goes through the middle of the contact patch.
The hotter versions of various FWD cars tend to use wider front tyres but still have to get them to fit within the same wheel arches, so the steering axis no longer goes through the middle of the contact patch.
25-02-2005, 05:15 AM
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Originally Posted by EscortWRC
I'll give it a shot.....
Its probably safe to assume that the driveshafts are made from the same material from side to side, so they will twist the same per unit length.
Its probably safe to assume that the driveshafts are made from the same material from side to side, so they will twist the same per unit length.
Also, many have experimented with the equal length drive shafts in RSTs, but apparently they have not had that much effect to torque steer.
25-02-2005, 06:46 AM
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Alex has a stage 2 box and makes no differance!! His car torque steers like a B!tch!!! You have to fight it!!! First time i drove it i nearly ended up in a bush pmsl 
Now i make sure i wedge 1 arm on the door and grip the fooker
Now i make sure i wedge 1 arm on the door and grip the fooker
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