Citroen WRT

**stefanvv** · 28th June 2017, 17:28

Originally Posted by Mirek

No, it can not. There is not and never has been any torque vectoring system used in WRC cars. What is being changed by switching of differential maps is the locking behavior not the torque split.

If I'm not wrong there used to be some king of adjustable split in Toyota Gr. A cars. But I'm not sure it was about the torque.

**wrc2017** · 28th June 2017, 17:49

WTF...

Meeke is bound to be fuming.

From autosport.com

"Citroen has implemented two homologation changes for Poland: a new rear differential rail and a modification to the torque split between front and rear axles.

Meeke was unavailable for comment, but a Citroen source confirmed both areas where he had been pushing for change

We weren't just rearranging the current parts on the car

I have a car which is driving from the front axle more now, said Mikkelsen

Meeke had been pushing for the changes? well why were they not on the car before now? Mikkelsen confirm a car driving more from front axle, surely this is Meeke preferred driving style coming from a front wheel drive background. And the fact that we were not just rearranging parts on the car means that these parts had, or were, being development but not tested. Most of Meeke and Lebrefrve accident are stupid rear end stepping out type accidents. It looks as if Meeke and the engineering team may have been at loggerheads.

Raises more questions than answers as to why it taken till now to suddenly get these updates on the car???

Mikkelsen being very bold with his predictions. Maybe not so wise.

**er88** · 28th June 2017, 17:53

Citroen obviously took some big risks in development last year. Is that something Yves Matton is directly responsible for or have engineers been sacked as a result?

Makes it even stranger that Meeke has been dropped imo. Lefebvre crashes just as much but toddles around at a snails pace. At least Andreas should be able to push for a win or a podium now he's tested properly with the car and made big changes to the car.

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**Mirek** · 28th June 2017, 18:20

Originally Posted by stefanvv

If I'm not wrong there used to be some king of adjustable split in Toyota Gr. A cars. But I'm not sure it was about the torque.

That was viscous couppling, not used in any WRC car. Nowadays it's pretty outdated system. Don't get confused with it. It can change torque split but You can't drive it in any way. Simply when one axle spins the other gets somewhat more torque but the ratio depends on the difference of speed between front and rear axle, on the oil temperature and other variables. Such system is slow, not energy efficient and also can not transmit high torques of modern engines.

**Simmi** · 28th June 2017, 19:06

Mikkelsen will also do Rally Germany with Citroen. Not sure about the other drivers?

https://twitter.com/AMikkelsenRally/...21401688170498

**AnttiL** · 28th June 2017, 19:14

Originally Posted by Simmi

Mikkelsen will also do Rally Germany with Citroen. Not sure about the other drivers?

https://twitter.com/AMikkelsenRally/...21401688170498

This also means he's not driving in Finland. The last we heard was that Citroen entered Meeke, Breen and Al-Qassimi to Finland...maybe that was all they entered after all?

**er88** · 28th June 2017, 19:49

Originally Posted by AnttiL

This also means he's not driving in Finland. The last we heard was that Citroen entered Meeke, Breen and Al-Qassimi to Finland...maybe that was all they entered after all?

Another laughable decision if so. Just let Andreas do all the remaining events along with Meeke and Breen. If they are so desperate to give Lefebvre a drive, they can bring a 4th car for him in the events Khalid isn't driving....

Honestly this team has been so badly managed in the last year. They almost deserve Andreas to turn round at the end of the year and tell them to shove any contract they offer him up Matton's arse. If Toyota don't get Tanak surely Mikkelsen would rather go there?

**OldF** · 28th June 2017, 19:57

Explanations for the difference between torque split and torque apportion.

http://www.awdwiki.com/en/torque+split+ratio/

Now let's take a vehicle with automatic all wheel drive systems as an example (assume the vehicle is front wheel drive under normal conditions). When in front wheel drive mode, the torque transfer is near 100/0 – most of the power goes to the front wheels. When front wheels slip, the transfer clutch attaches the rear axle. At full lock, torque split becomes 50/50. Now, if front wheels lose traction completely (ice, rollers, or raised in the air), 0% torque goes to the front wheels, 100% of torque goes to the rear wheels, but the ratio stays 50/50. Understand the two things: torque split ratio can vary from 100/0 to 50/50. But torque apportion can vary from 100/0 to 0/100.

**Fast Eddie WRC** · 28th June 2017, 20:29

RE Meeke being dropped and then big changes made for Mikkelsen as soon as he arrives..

You can only think that Meeke is/was being made a scapegoat for the bad decisions of others. I have been very critical of him this season but I have huge sympathy for him now. This latest treatment has been a disgrace.

**AnttiL** · 28th June 2017, 20:30

Originally Posted by er88

Another laughable decision if so. Just let Andreas do all the remaining events along with Meeke and Breen. If they are so desperate to give Lefebvre a drive, they can bring a 4th car for him in the events Khalid isn't driving....

Honestly this team has been so badly managed in the last year. They almost deserve Andreas to turn round at the end of the year and tell them to shove any contract they offer him up Matton's arse. If Toyota don't get Tanak surely Mikkelsen would rather go there?

Matton is between a rock and a hard place. A certain sponsor wants drives for Qassimi, the factory wants to have the French guy in the team, other drivers have either pace or consistency but not at the same time. Who do you put on the car?