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Heard that on the radio today too.

Seriously, if WRC could get the technical journalism that F1 has... It is literally the only aspect of F1 that is better.

You are absolutely right that they would take more space Since McPherson can be made quite narrow and allow a relatively large engine bay.

The upper control arm does not actually have to be the...

Well unless you design an A-arm with extremely wide cross section at the upper upright link (where the upright or knuckle or hub meets the control arm/A-arm) you can still fit the strut at the same...

Depends on where you attach the the suspension strut.

Not necessarily actually. A lot of desert buggys and such have super long travel suspension....

If we knew what we were talking about on a truly professional level, we'd be working for one of the teams by now ;)

Pardon my ignorance but how can the caster angle cause forces? I know that the...

Yeah but the unsprung weight is bigger meaning that the suspension is slower to react to changes. Sure it's probably stronger in case of a side impact on the wheel and sure, the camber stay the same...

I have a question about suspension setup. Does anyone know whether there are regulations concerning the suspension setup you use? Does it have to be McPhearson like the road car or would the regs...

I agree with your analysis regarding aero, but I wonder about the engine inertia rotating the car (it's probably a factor but the rotating assembly doesn't weigh a lot). In my head it makes more...

Those fluent in the technical rally car knowhow, does the modern rally cars have some kind of guard or protection for a flywheel blowing out or coming loose?

Having been unfortunate enough to...

Interesting, thanks!

From the onboard you can also see what looks like a jolt in the entire car during breaking at one downshift. Dunno if that's just a coincidence with a hole in the ground or indeed the gearbox but...

From the videos and photos it looks like the legs sheared off..

Meanwhile the Citroen setup is classic PSA motorsports setup. Cooling radiator on one side, intercooler on the other side.

I agree that the big "vacuum cleaner" pipe in the center is the intercooler pipe, but what has been suggested is that the separating black "strips" divides the radiator into three.

While that...

That may be, but what would the end ones be then? There are no visible pipes going in or out. Behind is most definitely the main radiator as you can see the coolant pipes going in and out of it.
...

Too much dampers and aero lately!
Saw this picture in one of Dimitris posts:
https://pbs.twimg.com/media/DDerxkwW0AAZw7u.jpg

And it got me thinking. The Yaris has the radiators in-line with the...

The center differential very likely has a clutch that operates with hydraulic pressure that locks the differential. That means that when there is no hydraulic pressure, the power is sent to where...

Very nice read as usual :)

Sulland meant valve float I am quite sure. It is when the valve springs are not strong enough to close the valve properly given engine speed, boost pressure and cam profile, meaning that the valve...

I mean that the ACD and AYC diff work differently from each other.

The ACD simply lock up with a clutch pack whereas the AYC have two different clutch packs with different function (to send...

Like I thought all along. People started saying that was not an active diff and that started making me confused. Thanks!

The Mitsubishi ones work differently from one another. Basically the center diff locks up (like having no diff at all if you don't factor in clutch slip etc) and the rear one locks up two different...

Took me a while to get around to answering to this one. Sorry about that.

So basically, unless I'm retarded, the old active WRC diffs according to Warmbold, Mirek and Ole-Martin were basically...

This makes me even more confused... What would then be a passive center diff? To me it sounds like a standard limited slip diff pretty much.

Hi Mirek (equal treatment to everyone :) )
Does that mean the old 99-2010 wrc cars had torque vectoring differentials too?

I remember they had very complicated hydraulic systems with...