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How to get rid of understeer?

Discussion in 'Project CARS Setups' started by Dan Allen, May 13, 2015.

  1. Dan Allen

    Dan Allen
    I am the Pastor Maldonado of RaceDepartment.

    First of all, I'd like to thank @Bram Hengeveld for making the thread about pCars setups. Funnily enough, I was having a moan earlier that I'm just terrible at setting up the cars not just in pCars, but in all sims.

    My problem is, I have this tendency to understeer a hell of a lot (I mean badly!). So I check the guide by Georg Siebert (I think it was him, apologies if it's a different Georg!), and I tune everything I can to get rid of understeer. I'm talking bump & rebound, ARB, cambers, diff settings, brake bias etc and I'm still no closer to having a car which feels nicer :(

    So, the million dollar question is, how do I know which thing to adjust. I'm starting to think that I'm doing *too much* to the car, but how do I know if it's a suspension thing or a brake thing for example. I think that's the only thing I don't understand, what situations call for what adjustments?

    Thanks guys, I'd to be uploading some setups myself once I get good at them :)
    Last edited: May 13, 2015
  2. Bram

    Ezekiel 25:17 Staff Premium

    Before making any changes to the setup try to find out where the understeer is coming from as in most occassions, especially with starting simmers the understeer is caused by the driver and not the car.
    • Braking too late
    • Carrying too much speed into a corner
    Try to brake a few meters earlier and as hard as you can. Floor the braking pedal when you start your braking sequence and gradually release it when you enter the corner entry.

    By doing so in most occasions the understeer is greatly reduced. Rule of thumb: slow in, fast out.

    Only start making setup changes when you master the car and the track after enough practice to lap consistently.

    My first adjustment on setups when I run into understeer is bringing the brakebias a few clicks to the rear as most default setups (in almost any game) cause my frontwheels to lock up under massive braking, which causes your car to go straight (understeer).

    Find the balance where both the rear and the fronttyres lock up at the same moment.
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  3. Dan Allen

    Dan Allen
    I am the Pastor Maldonado of RaceDepartment.

    Thanks Bram. I would say that I'm an intermediate sim racer, I've been sim racing for about 12-18 months now, and I have learned the slow in fast out rule.

    Although my driving is far from perfect, I think that it is a setup thing. I've just looked at Georg Sieberts guide again and have managed to dial it out. I think I'm beginning to get it now, but where as I used to get massive understeer it was intolerable, I'm now not understeering enough. I think I know what the problems are, it's just a case of finding the balance.

    But what I was really getting at was, if I had massive understeer (or oversteer for that matter) and I wanted to get rid of it, how am I supposed to know if it's suspension or brakes which need adjusting first?
  4. Bram

    Ezekiel 25:17 Staff Premium

    See the guides and ctrl+f for "understeer" :)
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  5. Hi Bram,

    just looking for a good setup tutorial, where can I find these guides?
  6. Dan Allen

    Dan Allen
    I am the Pastor Maldonado of RaceDepartment.

    • Like Like x 1
  7. I have experienced the same thing. I did three things to help and it's more or less resolved the chronic understeer I used to have:

    Playing with front tire pressures based on understeer/oversteer is the first. It's a balancing act, and if you get this wrong (either too high or too low) you can lose grip overall. For any cars I know that I experience a lot of understeer with, I usually decrease front tire pressure by 0.1 or 0.2 PSI (a few notches leftward on the sliding scale, depending on how the car is setup by default). This is a tip that occasionally pops up as a tip on the games loading screen.

    Make sure your steering ratio is set correctly is the second thing. I know this seems basic, but in many games you can set this globally, but in PCARS it's a per car setting. By default some openwheelers (like Formula A), is set to 10:9:1 or 10:5:1, which is around 270 or 360 degrees of rotation, but say a GT3 car could be 12:X:X. Obviously that means a lot more physical turning of your wheel, and it's hard to maintain consistency if you are jumping between car classes. Make sure that you set this correctly as per your preference. You can change it in your tuning setup in the garage before a session.

    I know Bram mentioned this already, but I generally do the exact same thing. I move the brake bias a few clicks rearward, as the default generally gives me front wheel locking, which in turns causes understeer as you aren't full in control going into a corner.
  8. rocafella1978


    not much happening in this thread...
  9. I'm new to setups too, I've been told 1 change at a time. Do say 10 laps consistently then make 1 change then do another 10 or so.

    so you still want front bias right, for more weight transfer to the front giving it more grip on turn in?

    What about softening up the front sway bar...