Car setups will never be the same with this model | Simracing | ACC

After this video, you will know how to tackle oversteer and understeer in minutes.

[SimracingArnout]

I find myself fixing my own car setups in acc nearly perfectly with this model. Part2

[NielsHeusinkveld]

Sorry but I have to comment negatively. But firstly, you put real effort into this video and that is appreciated. Secondly, you're not the only one who gets basic load transfer physics wrong! 🙂 This means lots of videos about this topic are spreading bad info. Driver61 for example as well! And people love the videos and think they've learned something when in fact they just got told 1+1=3. I can also be wrong, but this is very basic physics so I feel confident my bullet points below are "effectively" 99% accurate and true.
1) Changing ride heights, springs, bump rubbers, does NOT change the static ground loads (Driver61 thinks so). A 1000kg car with 50/50 front/rear weight will have 250kg on each corner, even if you add 25mm rear ride height.
2) Changing ride heights, springs, bump rubbers, does NOT (maybe 0.1%) change load transfer. If you do 0..100kmh in 3 seconds, the front and rear tire loads will be the same regardless of these setup parameters. Take a turn at 1.5G and the total load transfer is identical with any combination of these parameters.
3) Total load transfer is always the same at a certain G force, but when cornering, you can tweak how much of this transfer is taken by the front, and how much by the rear tires. The stiffer side of the car, stiffer springs, bump rubbers and/or anti roll bars, will take more of the load transfer than the softer side. The stiffer side almost always should have less grip than the softer side, because of tire load sensitivity.
4)Stiffer springs and bump rubbers reduce suspension travel for a given cornering, braking or acceleration G force. Reduced suspension travel means the ride heights of the car change less as you are driving around.
5) When speed goes x2, downforce goes x4 (!) so when talking about aero, high speeds are way more impacted than low speed
6) Downforce is often very sensitive to ride heights. Typically a lower car has more downforce. Typically, adding a little bit of rear ride height, or lowering the front, will move the aero balance forward.
7) A softer car, having ride heights moving more, will have its downforce levels and the balance of this downforce, change more during a lap. This isn't good or bad, it depends on many things, but is the reason in general, racing cars with downforce are stiff, especially at the front, as being 5mm too high will simply cost you high speed grip.
I made some videos that might be informative: /watch?v=QKPG8fCWT5A and /watch?v=I8x3ISXSnEg

[socomunist]

I started sim racing last month. Now I'm here. Things have escalated quickly. 😂

[kineticstringwell]

honestley brother thats the best explination of real world racing physics explained perfectly that was awesome my friend

Finally… after years of messing around I got it - thanks to this video!

[Trickshot_]

You definitely deserve more subs man this is some 1 million sub quality advice

[TomTheSurgen]

I already understand all the physics and setup, but even then this explanation I found to be fantastic in its approach

[joshua]

Glad this popped up on my feed cause I’m relatively new to ACC and have been struggling a bit with front grip on some of the front-engine cars and was curious about changing setup. This works great!

[celticpicker]

Thanks for this video. It really has helped me understand the effect of changes on setup. I have been using your baseline setup for all the cars I use and it has allowed me to set PBs on all the tracks I drive. Keep up the great work. I think that further info about the effects of toe, caster, camber along with bumpstop and wheel rates would be a big benefit to all who view your videos.

[WolfiesWheels]

I’ve been using your baseline set up for a few months now and it definitely helped improve lap times and driving enjoyment. But I’m now finding that I could do with making some further adjustments to improve further still, and this film and explanation have given me some great pointer. Thanks 👍🏻

[Tj]

Nice 'mental model' which fits together all the component parts of the system.

Making it simple

[Randomii]

Finally someone aknowledging it's not only about over/understeer.
The thing i struggle most with in ACC is controlling the weight transfer. My driving style relies quite heavily on weight transfer, and even body roll, but no matter what i do the cars don't seem to behave.
More often than not, i end up with the same problem. Not being able to transfer enough weight to the front to get good and responsive turn-in.
Even if all of the information here isn't 100% accurate, there's definitely a couple takeaways i wouldn't had even thought about. Curious to see if i could get rid of my issues now

[MattO]

Dude this stuff just earned my sub and my views, such good stuff. Good work.

[NgrK]

man you deserve more subs no doubt! thanks for everything you do for community!

[ahmanviik]

This model was very easy to understand and i definitely feel abit more confident to try and adjust those settings myself. For me personally i would love to see more from the actual ingame setup manager and how different settings applies on track. Im very much a visual learner so that would help me. I understand that takes alot more effort, but just a sidenote :) Awesome video Arnout, thanks a bunch!

[DriftJunkie]

You are very nuch on point sir, this is very close to the philosophy I use to get me WR driving setups.
Still, really chaotically and imprecisely explained, because there are so many things happening at once, it is hard to explain in a series of slides. Exactly the thing which has deterred me from making the same video.

If you wish for this philosophy to become mainstream, I would think about redoing the explanation.

[G-Force-jftx]

very helpfull thank you
hope we get mid engine model soon

[af-s]

My doubt is, the weight will always "try" to move, that's momentum of the cars chassis. So for example if I brake, the weight will move forwards, what changes with a hard vs soft setup on the front would be the amount of suspension travel but the weight will always be there, the pressure on the wheels, isn't it? I was under the impression we used bumpstop ranges to control car behaviour when the forces are applied on the 4 wheels of the car, when the suspension hits the limit, not necessarily to change the amount of force applied on the each wheel. I might be completely wrong, I learn new stuff about setups almost every week. Also my knowledge isn't from ACC only, but other sims as well, so things could be different.

[lapougne]

hi Arnout !
I'm not sure if you ever talked about camber and how it can save your tires in racing. How to use it to balance heat and degradation along your race. Not here to give lesson to anyone, just something i just found out : when you check your tire temp after a few lap in practice or qualifying, IMO gives you 3 numbers. When first and last have less or equal 10 degrees delta, tire wear is greatly reduced and grip is optimal during at least a 45 min race. If you put max camber whitout adjusting, after 25 min or so, your tires begin to wear greatly and car begins to slide a lot, forcing you to adjust brake bias and so loosing time in corners. Hope it helps, and maybe you can make a video about it. Cheers !

[Freddepadd]

Great video! Please go into more depth on arb, caster and differential values as that's what i struggle with most when setting up the car.