Setting up the toe, how and why !

Hi everyone, i have some knowledge on how to setup my cars but, i'm going mad every time with the TOE !

Here a picture for everyone just in case



And please correct me if i'm wrong lol, but if i have correctly understood the value in game:

a negative value is toe out (almost every car has toe out on the front then, seems strange to me lol)
a positive value is toe in.

Cheers and thanks in advanced !

 

The problem here is, as in real life, in AC we adjust toe by varying the length of steering arms. That is the value in the setup filed is not angle, it's length (in some cars like Evora GTC it is even shown in milimeters instead of "ticks"). Now depending on the position of steering arm in real car (in front or on the back of the wheel) adding length to steering arm will either increase or decrease toe angle.
Other than that it's as your picture say, fronts of the tyre coming closer together = toe-in = positive angle on the live information panel.

Bottom line: just watch the live toe values on the right side to be sure of correct setup change.

 

Lol - nice one , I always think about my feet / point my toes inward= positive / point my toes outward Charlie Chapplin = negative

 

From Wiki:

In automotive engineering, toe, also known as tracking,[1] is the symmetric angle that each wheel makes with the longitudinal axis of the vehicle, as a function of static geometry, and kinematic and compliant effects. This can be contrasted with steer, which is the antisymmetric angle, i.e. both wheels point to the left or right, in parallel (roughly). Positive toe, or toe in, is the front of the wheel pointing in towards the centreline of the vehicle. Negative toe, or toe out, is the front of the wheel pointing away from the centreline of the vehicle.[2] Toe can be measured in linear units, at the front of the tire, or as an angular deflection

Cya

 

Doh, I've been doing it wrong. Do most race cars have toe in or toe out? I've been wacking a ton of negative toe on most of my car setups...?

 

Also what is the explanation behind toe changing car behaviour? I get it for the rear, but the front?

 

More negative = better turn in, less stable braking. On my hotlap setup i'm usually set some toe out.

 

https://www.google.co.nz/search?q=r...JsLFmQWs0YKYAg#q=race+car+wheel+alignment+toe

http://en.wikipedia.org/wiki/Toe_(automotive)
http://www.ozebiz.com.au/racetech/theory/align.html

etc etc

 

Toe out in the front:
Faster turn in, slower midcorner on some tires, more unstable braking, more heat, looser more inaccurate steering. I set toe in the front so I get a neutral toe value when braking, so sometimes I will use positive, usually negative.

Toe in in the front: Slower turn in compared to rear end of car, tighter and more accurate steering, stable braking, more heat. As above, I set toe based on toe value when braking. I never want positive toe when braking hard, but I do want negative. I don't want excess negative either because it will cause oversteer that is unwanted.
Depending on geometry, bumpsteer either increase toe out, or toe in. Bumpsteer does not always increase toe out.

Toe out in the rear: Avoid. Unstable car, not even good for drifting. All kinds of problems cause the rear end turns in far faster than the front.

Toe in in the rear: Set a bit. Allows the car to corner at a higher speed and not oversteer if it's otherwise neutral, increases heat, slower turn in but more controlled, more controlled braking. Car does not want to change direction mid slide so easily, especially during understeer.

Toe is very important and can turn an understeering POS to a neutrally balanced car. I go to toe first when I get handling problems.

 

Charlie Chapplin, you sir made my day lmao ,

Thanks everyone for the answers, hope could help other racers as well who knows !

See you on tracks !!

 

So just to be sure here an example:

When i look to the live information panel:

if the value of the TOE is under 0 i got negative TOE / TOE out, otherwise,
if the value of the TOE is greater 0 i got positive TOE / Toe in.

My whole life was a lie til now :')

 

You have to look at the actual readings on the right. You could be at 15 at still have 0 toe. Depends on the car.

 

Yep i knew that from the start, never looked at the trigger on the left it means nothing for me so ^^

 

Yes.

 

Also depends on the pit lane, which is why AC's set up system is such a POS.

Generally toe in on the front and toe out on the back. If it is a FWD then some toe out on the front.

 

Articles on the internet say exactly the opposite.

 

Dont forget how braking and weight transfer alter the toe.

When you apply weight you get more negative toe, camber etc.. Sonthe harder you brake the more negative toe you will get.

The same goes for the back, if you have -0.05 toe out on the rear when stood still you would find that under heavy braking you will get +0.10..because weight decreases and the rear end lifts..

Ideally you would want neutral toe on the rear un the hardest of braking zones.

The more toe out you give a car the more direct and pinpoint it will feel on initial turn in but it will be harder to maintain that turn in arch and start to give you mid corner understeer.. So you want to reduce it as much as you can but still maintain a nice turn in.

 

What I want to know is whether assetto corsa simulates changes to the toe while driving. For example, when a rear wheel car accelerates the rear tyres are forced forward, increasing toe in. And while braking they are forced backwards increasing toe out. Also, for front wheen cars the same happens.

 

It does. Go to the suspension app set it so it shiws a value of 0.00 and accelerate and brake and you will see the T value change as you would expect.

But T also incorporates turn aswell so try not to turn you wheel whule doing the test, when i did it last night the values didnt chage as much as id of expected them to but that could of been tge stiff setup so i suggest you use a softly sprung car for best results