Technical Analysis WRCars 2018 [Archive]

steve.mandzij

14th January 2018, 04:17

Toyota is even more uglier than before.Really? I thought that without taking liveries into account that it was the second best looking of the four cars, second to the i20.

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AnttiL

14th January 2018, 05:55

What updates have the factories done on their cars for the 2018 season?

Can they really do anything extra outside the normal homologation jokers? So 2018 cars are just 2017 cars

KiwiWRCfan

14th January 2018, 07:06

Interview with Chris Williams - MSport's chief engineer
https://rallysportmag.com/interview-reflections-of-m-sports-winning-season/

ESTR

14th January 2018, 08:05

Really? I thought that without taking liveries into account that it was the second best looking of the four cars, second to the i20.

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Most normal looking is Citroen, their shapes are good looking, Hyundai and Ford are like Japanese roof styles with those wings.. Toyota is bizarre with those big drawers for cd-s.. Yes they are exciting all of them, but they could produce beatiful and still efficient cars, not just some random styles like in NFS: Underground 2

AnttiL

14th January 2018, 09:15

https://rallysportmag.com/gradual-changes-only-for-hyundais-world-rally-car-in-2018/

Hyundai starting with the updates Neuville had at the end of 2017

Tarmop

14th January 2018, 09:22

Well, i think that at the moment the sophisticated looks are more "rally/racecar" than the previous generation which was more similar to some NFS-style boyracers tuning.

Watson

14th January 2018, 10:01

Form follows function.

Mrpengski

14th January 2018, 22:53

Can they really do anything extra outside the normal homologation jokers? So 2018 cars are just 2017 cars

There is still quite a bit that can be done for the "optional" homologated and non-homologated parts.

Fast Eddie WRC

15th January 2018, 19:48

https://wrcwings.wordpress.com/2018/01/15/aerodynamic-fine-tuning-in-january18-wrc-tests/amp/?__twitter_impression=true

seb_sh

16th January 2018, 07:05

https://wrcwings.wordpress.com/2018/01/15/aerodynamic-fine-tuning-in-january18-wrc-tests/amp/?__twitter_impression=true

nice article, not super insightful but better other "analysis" that some websites posted.

dimviii

17th March 2018, 17:11

Mads Østberg and aerodynamics in a WRC jump

https://wrcwings.wordpress.com/2018/03/17/mads-ostberg-and-aerodynamics-in-a-wrc-jump/

lluisva555

6th April 2018, 15:52

Our new post on Aero details of 2018 WRC cars. Hope you enjoy it!

https://wrcwings.wordpress.com/2018/04/05/aero-details-of-2018-wrc-cars/

1580

mknight

7th April 2018, 07:28

Our new post on Aero details of 2018 WRC cars. Hope you enjoy it!

https://wrcwings.wordpress.com/2018/04/05/aero-details-of-2018-wrc-cars/

1580

Nice summary, two things:

- About the small wings above front wheels. They were probably added because of the extra air coming out of the wheels (due to more open area in front). Thing is the way they are done with the small gap for air from front, the additional air from the wheels increases the speed of the airflow on the underside of the wing (blown wing) which should increase the downforce quite a bit.

- In Sweden it seemed that the ribs in C3 diffuser are now much stiffer since the "flapping" seen during whole 2017 wasn't there so much

lluisva555

7th April 2018, 20:46

Thanks a lot for your great contribution, already incorporated into the post.
1584

lluisva555

6th May 2018, 10:54

Our new post tries to explain how WRC cars use energy from the exhaust to gain downforce - Exhaust blown diffusers in WRC
(https://wrcwings.wordpress.com/2018/05/04/exhaust-blown-diffusers-in-wrc/) Hope you like it!
1587

Sulland

22nd May 2018, 14:21

EstWRC

22nd May 2018, 16:03

no.

the end.

lluisva555

23rd May 2018, 18:21

Don't think so, cars are pretty fast and safe. New car homologations will be allowed in 2020, but regulations are expected to be stable for some more years.

F1 is another (sometimes crazy) world

Rally Power

24th May 2018, 13:34

Have the rally cars reached the same issue as in F1, where the aerodynamics are getting to advanced, and cornering speed too high? In F1 it makes overtaking hard, and in rally it moves us towards safety issues for the drivers. F1 will make changes, will rally?

Since the first videos of ‘17 WRC cars testing we got to know they were incredibly fast and last season has proved they were the right choice for the series; their ‘wow factor’ is helping WRC to recover the interest of old fans and attract new ones.

Safety concerns will always exist and current cars aren’t necessarily more dangerous than the previous ones, having in mind their safety devices improved design. Besides, at any time the FIA can easily make them a bit slower, taking off some power and torque via a smaller engine restrictor.

Anyway, it seems premature to be asking for major tech changes as we’re just on the second year of an initial 3 years cycle; it’d be great for the series to keep current regs till 2022, the end of the second cycle. Regs stability is vital to attract more manus and these cars simply rocks!

Mirek

24th May 2018, 13:50

Hartusvuori

24th May 2018, 15:54

This is nearly same accident from 2009 with a gr.N car with roughly 120 Hp less than the WRC (equipped with Prodrive T45 rollcage). Was it less dangerous? I don't think so.

https://www.ewrc.cz/images/2009/sumava/stajf-crash-11.jpg

More photos: https://www.ewrc.cz/clanek/10970/

https://www.youtube.com/watch?v=kCst6qw_Nq0

A serious Subaru crash from Finland last Autumn. Drivers were hospitalized, but returned to competition a few weeks later.

Fast Eddie WRC

6th July 2018, 12:09

http://performance.ford.com/series/rally/news/articles/rally/2018/07/world-rally-car-centre-differential.html

Sulland

17th August 2018, 20:58

Who are the firms delivering dampers and springs to which WRCars and R5s these days?

AMSS

18th August 2018, 09:11

Who are the firms delivering dampers and springs to which WRCars and R5s these days?

AFAIK

R5

Skoda Sachs/Eibach
Citroen Reiger/Eibach
Ford Reiger/Eibach
Hyundai Extreme suspension/Eibach
Peugeot/DS3 Öhlins/Eibach
VW Sachs/Eibach

WRC
Hyundai Extreme suspension/Eibach
Ford Reiger/Sachs Eibach
Citroen Öhlins/In house Eibach
Toyota BOS/H&R

sonnybobiche

19th August 2018, 08:13

"When you have no hydraulics you have no center diff." -JML 2018

You heard it here first.

lluisva555

19th September 2018, 17:40

See how wheels impact on the aerodynamics of WRC cars and the solutions teams implement to minimize such impact, in our new post

https://wrcwings.wordpress.com/2018/09/19/wheels-impact-on-the-aerodynamics-of-a-wrc-car/

Hope you enjoy it!

Fast Eddie WRC

16th October 2018, 18:23

New post on the M-Sport rear diffuser. Thanks guys.

https://wrcwings.wordpress.com/2018/10/15/review-of-the-ford-fiesta-wrc-new-rear-diffuser

dimviii

31st January 2019, 18:59

Hyundai tests in Sweden new aero modifications for their i20 WRC Coupé 2019

https://www.wrcwings.tech/2019/01/31/hyundai-tests-in-sweden-new-aero-modifications-for-their-i20-wrc-coupe-2019/

logic

31st January 2019, 19:04

The square pictured is the plastic cover for the boot pins so they do not get iced up.

dimviii

31st January 2019, 19:13

The square pictured is the plastic cover for the boot pins so they do not get iced up.

yes probably the author didnt know that old trick.

logic

31st January 2019, 21:46

https://www.youtube.com/watch?v=mF_rMRGLt5A&feature=youtu.be

2:19 in the video you can see the covers.

Duvel

20th February 2019, 19:12

I have a question for the rally guru's on here. In service park, i sometimes saw a wrc car going full gas high in revs (stationary and while on standards). All team members put there fingers in there ears. This is than repeated for three or four times.
What is it that they are testing or controling then?

dimviii

20th February 2019, 19:54

transmission changes that they have to be sure that gears change properly,to test variable parts that changed they work properly,they dont leak oils/waters/fluids,changes at ecu maps that they have to secure that work proper etc.

logic

21st February 2019, 06:15

Duvel

21st February 2019, 18:07

Its call a boost check, it is done to make sure the ALS and boost level are correct.

Turbo boost than? What does ALS do exactly?

Tarmop

21st February 2019, 18:59

ALS=anti lag system

Duvel

21st February 2019, 19:01

ALS=anti lag system

I am a mecanic, but dont know what a anti lag system does. Shame on me, can anyone explain a bit?

Zeakiwi

21st February 2019, 19:52

WRC have secondary air injection (antilag system)?
https://youtu.be/l3fWANi_SsE?t=210

logic

21st February 2019, 22:26

Turbo boost than? What does ALS do exactly?

The ALS stands for Anti Lag System.
That it does is keeps the turbo building boost or on boost by recirculating air from the hot side of the intercooler back into the exhaust while retarding the ignition which creates a better scavenging effect within the engine. This causes the turbo to stay on boost.

The boost check is done to make sure the launch control strategies are working and to check the turbo speed to make sure the entire system is working correctly.

logic

21st February 2019, 22:27

The ALS on the modern WRC cars is called a fresh air ALS. (explained above)

Fast Eddie WRC

18th April 2019, 18:35

How the 2017 Aero Revolution transformed WRC

https://www.autosport.com/engineering/feature/9012/how-an-aero-revolution-has-transformed-the-wrc

sonnybobiche

23rd April 2019, 07:41

How the 2017 Aero Revolution transformed WRC

https://www.autosport.com/engineering/feature/9012/how-an-aero-revolution-has-transformed-the-wrc

I've waited years for an article like this. Thanks for posting!

lluisva555

7th May 2019, 21:02

If you're interested in the aero of WRC, that's our main subject at WRCWings, feel free to visit our website at http://www.wrcwings.tech

dimviii

22nd May 2019, 20:21

https://pbs.twimg.com/media/D7HA89NXoAA7PNt.jpg

https://twitter.com/Mazzucchelli_L/status/1130935294558126080

mknight

22nd May 2019, 20:32

About the first time Toyota is clearly copying rival teams when it comes to aero.

EDIT:
Speculation: The renewed interest (they evaluated this before Mexico as well), could also be due to the brake issues Meeke had in Argentina. The dust entering the rear brakes trough the lower entry point could have been a factor.

Fast Eddie WRC

23rd May 2019, 10:07

Testing this why Haninen is entered for Sardinia ?

https://www.wrcwings.tech/2019/05/21/toyota-tests-new-air-intakes-for-rear-brake-cooling-of-the-yaris-wrc-in-rally-portugal-pre-event-tests/

AnttiL

23rd May 2019, 11:05

Testing this why Haninen is entered for Sardinia ?

https://www.wrcwings.tech/2019/05/21/toyota-tests-new-air-intakes-for-rear-brake-cooling-of-the-yaris-wrc-in-rally-portugal-pre-event-tests/

Well, when they use a WRC event for testing, they can only use homologated parts. Mäkinen said in a Finnish interview thay they have many things to do testing for in the heat of Sardegna.

Fast Eddie WRC

23rd May 2019, 15:36

Well, when they use a WRC event for testing, they can only use homologated parts. Mäkinen said in a Finnish interview thay they have many things to do testing for in the heat of Sardegna.

Haninen can still drive the existing car as a test for the problems that the new parts are designed to alleviate and see if they are really needed.

racerx1979

23rd May 2019, 15:46

Haninen can still drive the existing car as a test for the problems that the new parts are designed to alleviate and see if they are really needed.

Should JML be worried if Hanninen comes out and does better than him? I would think so considering the bad start to the season.

Mirek

23rd May 2019, 16:11

Well, when they use a WRC event for testing, they can only use homologated parts. Mäkinen said in a Finnish interview thay they have many things to do testing for in the heat of Sardegna.

I am waiting to see which dampers Juho will have on the car...

racerx1979

23rd May 2019, 16:20

I am waiting to see which dampers Juho will have on the car...

Are they supposed to switch from BOS?

Mirek

23rd May 2019, 16:54

Are they supposed to switch from BOS?

More and more teams switch to Sachs (Hyundai as the last) so I wonder whether they give it a try in a real event as well.

racerx1979

23rd May 2019, 19:14

Well last I heard they had a relationship with BOS and ZF, but Toyota is really happy with their high-end super lightweight BOS dampers. I can lift a complete damper so easily with one arm... amazing!

AMSS

23rd May 2019, 19:32

More and more teams switch to Sachs (Hyundai as the last) so I wonder whether they give it a try in a real event as well.

Didn`t M-sport state that they made a sole rights WRC deal with Sachs for 2019? And Hyundai (at least so far) only changed the tarmac damper supplier and it`s not Sachs...
Also Evans still has used Reiger on tarmac events this season, on gravel events he`s still been on Sachs.
Spoken with many mechanics in WRC/WRX teams, and the general opinion is it was not Sachs that was something superior in VW (both WRC and WRX) but VW:s geometry, for instance only for WRX they tested over 30 different geometries before they made a decision.
With a great geometry the demands from the actual damper is not as crucial as in a bad geometry..

Rally Power

23rd May 2019, 19:36

More and more teams switch to Sachs (Hyundai as the last) so I wonder whether they give it a try in a real event as well.

EXT seems to still be involved with Hyundai: https://www.facebook.com/ExtremeShox/

Mirek

23rd May 2019, 19:39

EXT seems to still be involved with Hyundai: https://www.facebook.com/ExtremeShox/

At least on Korsica Hyundai had PKM/Sachs.

Mirek

23rd May 2019, 19:40

And Hyundai (at least so far) only changed the tarmac damper supplier and it`s not Sachs...

PKM is de facto Sachs I think.

AMSS

23rd May 2019, 19:49

PKM is de facto Sachs I think.

Yes it`s PKM but it`s not direct Sachs, PKM also makes their own dampers, but what`s internal in the bodies (if it`s Sachs, PKM own or something else) probably only Hyundai and PKM knows

Sulland

11th June 2019, 15:53

So what setup of brands of dampers/springs are Hyundai testing on Huttunens car?

AMSS

12th June 2019, 07:42

So what setup of brands of dampers/springs are Hyundai testing on Huttunens car?

At least in Riihimaki rally the damper bodies were EXT

Gustav Andel

20th June 2019, 10:57

Hi Guys! I am from Czech republic and rally is my passion whole my life. I love every kind of motorsport racing and so i am watching every race, practice, quali... F1, V8 Supercars, RX... But rally is rally :heart:
For a long time I was regulary reader of this forum and now i have registration too, because i have a question :)

Does anyone know what is the purpose of the panels in front of the cooler?
1785

lluisva555

20th June 2019, 16:20

They are used in too cold conditions (Sweden) to reduce the amount of cooling air flow, or when cars are not in competition mode (cerimonial starts and so on)

Gustav Andel

21st June 2019, 07:24

They are used in too cold conditions (Sweden) to reduce the amount of cooling air flow, or when cars are not in competition mode (cerimonial starts and so on)

Thank you. I understand reason due too cold conditions. Using in non competition mode less. Lower power - lower amount of air?

br21

21st June 2019, 10:12

Thank you. I understand reason due too cold conditions. Using in non competition mode less. Lower power - lower amount of air?

Engine working on lower load, lower RPMs, etc. so generating less heat, so less cooling needed, and you close radiators to have correct working temperatures