Assetto Corsa Rally: unstable over kerbs — what to change

What to change, exactly

Ranges, steps and defaults are the REAL ones for this sim. The amount is expressed in the game's own unit so you can apply it without converting anything.

Parameters flagged as “estimated range” do not come from a verified in-game capture: the direction of the change is right, the exact magnitude may differ on your car.

1. 1.Front anti-roll bar

   Lower ↓ by 1000 N/m2 slider stepsestimated range

   Range: 0 – 30000 N/m · Default: 2500 N/m

   How much the front axle resists roll, in N/m. Soft allows independent wheel movement (gravel); stiff gives platform stability on high grip (tarmac). On the i20 it's set VERY soft at the front (2500) vs the rear to aid rotation.

   What changes when you move it this way

   Softer front = less understeer and better compliance over rough terrain.

2. 2.Rear anti-roll bar

   Lower ↓ by 1500 N/m3 slider stepsestimated range

   Range: 0 – 30000 N/m · Default: 14500 N/m

   Rear axle roll resistance, in N/m. Inverse logic to the front: stiffening the rear increases rotation; softening it stabilises the rear. The i20 Balanced preset runs the rear much stiffer (14500) than the front.

   What changes when you move it this way

   Softer rear = more traction and rear stability; fixes oversteer.

3. 3.Front fast bump

   Lower ↓ by 250 Ns/m2 slider stepsestimated range

   Range: 1000 – 8000 Ns/m · Default: 2750 Ns/m

   Front high-speed COMPRESSION (sharp impacts: bumps, rocks, kerbs). Soft lets the wheel move up quickly on gravel; medium manages impacts on tarmac.

   What changes when you move it this way

   Softer = the wheel absorbs bumps and rocks without upsetting the car; ideal on gravel/snow.

4. 4.Rear fast bump

   Lower ↓ by 250 Ns/m2 slider stepsestimated range

   Range: 1000 – 8000 Ns/m · Default: 3000 Ns/m

   Rear high-speed compression (sharp rear impacts). Soft lets the rear absorb bumps and keep traction on gravel.

   What changes when you move it this way

   Softer = the rear absorbs bumps and rocks while keeping traction; ideal on loose ground.

5. 5.Front fast rebound

   Lower ↓ by 250 Ns/m2 slider stepsestimated range

   Range: 1000 – 8000 Ns/m · Default: 3500 Ns/m

   Front high-speed EXTENSION (how fast it returns to the ground after a bump/jump). Too high and the wheel stays 'hung' after the hit and loses grip.

   What changes when you move it this way

   Softer = the wheel regains contact quickly after a bump, keeping grip on rough terrain.

6. 6.Rear fast rebound

   Lower ↓ by 250 Ns/m2 slider stepsestimated range

   Range: 1000 – 8000 Ns/m · Default: 3250 Ns/m

   Rear high-speed extension. Set too high, the rear stays in the air after a bump/jump and loses traction on landing.

   What changes when you move it this way

   Softer = the rear regains contact quickly after bumps/jumps, keeping traction.

If that wasn't it

Symptoms get confused with each other: what feels like poor traction is very often oversteer on throttle. These are the other diagnoses for this sim.

• Understeer on corner entryYou turn in and the car keeps going straight: it washes wide before the apex.
• Mid-corner understeerMid-corner, at steady speed, the car refuses to hold the line and you have to unwind the wheel.
• Understeer on corner exitAs you get on the throttle the car pushes wide and runs out of road on exit.
• Oversteer on corner entryAs you release the brake and turn in, the rear steps out and the car rotates too much before the apex.
• Mid-corner oversteerMid-corner the rear keeps sliding on its own and you are correcting with the wheel the whole way through.
• Snap oversteer on throttleYou get on the power on exit and the rear snaps sideways: spin, or a big correction.
• Unstable under brakingBraking hard in a straight line the car moves around, the rear tries to come round or you lock up.
• No traction on corner exitOn exit the driven wheels spin and the car won't hook up: you lose time down the next straight.
• Tyres overheatingGrip falls off after two or three laps and temperature or pressure climbs past the window.
• Tyres not coming up to temperatureThe first laps the car slides everywhere and the tyres take forever to switch on.
• Car bottoming outOver fast sections or compressions the floor hits the track, the car bounces and you lose grip exactly there.

The same problem in other sims

Same symptom, different parameters: each game exposes different sliders, with other units and other ranges.

• ACC
• LMU
• AC EVO
• EA WRC
• iRacing
• rFactor 2
• AMS2
• AC
• RaceRoom
• F1 25
• GT7
• Forza