[WRC] Arctic Rally 2021

[Japé]

How stuck have Bertelli's car been in snow bank really? Looks like it is almost on road. Could they had just shovelled it out or tried to put e.g. their jackets or something under tires to get more grip if needed.

[Mirek]

On a long strait to me power is worth a lot driving on 6th gear. It says itself more hp will give you a higher speed faster..

Power yes but I was not argueing about power because I believe there is minimal difference between the cars in the maximum power.

IMO in rally car when people talk about weak engine it means in reality that the engine is low on torque, I really don't believe there are big differences in peak power. Even the really terribly outdated 20V Fabia WRC engine was quite ok on peak power but it was very bad on torque. Lack of torque doesn't really matter on straights or flat out corners but it does matter a lot on events which are full of long medium-fast or even slow corners (depends what we consider slow and what level of grip is available). The lack of torque IMHO also adds to traction issues.

In general the message was - if M-Sport suffers here from the engine it will suffer much more in other more twisty events.

[dimviii]

Rallirinki / Teemu
@HartusvuoriWRC

This is how Siikakämä stage looks like after the first run. The road is holding it much better now, cuts through at braking points though. #WRC #ArcticRallyFinland

[Rallyper]

Power yes but I was not argueing about power because I believe there is minimal difference between the cars in the maximum power.

IMO in rally car when people talk about weak engine it means in reality that the engine is low on torque, I really don't believe there are big differences in peak power. Even the really terribly outdated 20V Fabia WRC engine was quite ok on peak power but it was very bad on torque. Lack of torque doesn't really matter on straights or flat out corners but it does matter a lot on events which are full of long medium-fast or even slow corners (depends what we consider slow and what level of grip is available). The lack of torque IMHO also adds to traction issues.

In general the message was - if M-Sport suffers here from the engine it will suffer much more in other more twisty events.

Have you ever reved an engine coming up on revs where power is at highest you realise power means something even on high revs? Torque is on low revs. So going on high revs on 6th gear coming in to the high power area will make some differnce.
Have a felling this was a discussion a couple of years ago. Hard to explain when words are missing (language...)

[Rallyper]

Asunmaa got notional time of 9:47,4 on SS4.
Egon Kaur got 9:48,9
From COC.

[wwbroe]

Stage 6 is live with a little moment for Loubet

[EstWRC]

Loubet all over the place

[Mirek]

Have you ever reved an engine coming up on revs where power is at highest you realise power means something even on high revs? Torque is on low revs. So going on high revs on 6th gear coming in to the high power area will make some differnce.

Per, power is a value. It is a value made of torque multiplied by engine speed which means power is always a thing of high rews (high relatively to the used restrictor).

If I say I don't believe that there are big differences in power between the cars I mean they have roughly same value of peak power, which means they can all reach about the same top speed if they had the same drag coefficient and were not limited by gearing. That's simple physics.

However what is important the most is the work the engine can deliver over a certain used RPM range (energy delivered). If you know how power curve looks, this work (or delivered energy) is the area of the graph between the RPM-axis (X-axis) and the power curve in the given RPM range (it's really that simple).

Why is torque important? Because power is torque x engine speed, i.e. when RPM is +/- given by the regulations what you can work on is the torque to achieve as flat power curve as possible (because the largest achievable area is square - when power curve is parallel to the RPM-axis). The most difficult part on that is IMHO to keep the engine efficiency over wide range of RPM, hence why the difference isn't usually in the peak power but in the curve shape.

In simple words. If you put the cars on a drag track and shift ideally you will probably have nearly same finish time for all. But now do the same but shift from 3rd directly to 6th gear and you will see the diffrence between the cars.

On fast events the engine use is closer to the ideal drag track while with more and longer turns (especialy with uneven radius) it gets closer to the second scenario because you need to use much wider RPM range than the ideal one.

I hope it's understandable now.

[Fast Eddie WRC]

Shame for Loubet with no power.

[SubaruNorway]

Don't they use the push to pass feature on the Rally safe system in WRC? Heard they use it ARA.