Base setup: which four adjustments to touch first

The four adjustments that most change how the car behaves — and therefore the first to test in a base setup — are tire pressure, camber, anti-roll bar, and brake bias. In that order, because each one affects how you read the next one: adjusting outside that sequence usually makes you fix the wrong symptom.

The rest of the setup — springs, dampers, ride height, differential — only compensates once these four are already coherent with that day's tire and track. Before that, any fine-tuning is guesswork.

Why this order and not another

Pressure changes tire temperature. Temperature changes the grip that camber delivers. Camber changes how the anti-roll bar responds in a fast corner. And brake bias only makes sense to evaluate once the car is already stable in steady-state cornering.

Reversing the order creates a classic problem: you adjust the bar to remove understeer, but the understeer was actually cold front tire pressure. The car improves a little, you think you fixed it, and you carry that mistake through the rest of the session.

Tire pressure: the adjustment that distorts all the others

Wrong pressure changes the shape of the contact patch before you even touch any other parameter. A tire that's too cold doesn't generate grip; a tire that's too hot degrades fast and fades by the end of the stint.

The target isn't a fixed pressure: it's the hot pressure that settles within an acceptable range for that compound, on that track, at that track temperature. This changes session by session, not just car by car.

• Cold reference pressure: the setup starting point, adjusted afterward by what telemetry shows once hot.
• Post-stint hot pressure: the number that actually matters — compare across all four tires to find work asymmetry.
• Front-rear difference: indicates whether the imbalance is axle-wide, not just one tire.

Camber: only after pressure is locked in

Camber redistributes where the tire works across its own width. With wrong pressure, you're adjusting the heat distribution of a tire that's already out of range — the data isn't reliable.

With stable pressure, the read becomes simple: higher temperature on the inner edge calls for less negative camber; higher temperature on the outer edge calls for more.

Anti-roll bar: balance during the rotation phase

The front and rear anti-roll bar (ARB) defines how the car splits lateral load transfer between the axles. It's the adjustment that shows up most as understeer or oversteer mid-corner, not on entry or exit.

If the problem shows up specifically during rotation and not under braking, it's worth reviewing why time is lost in the rotation phase and not under braking before touching the bar — sometimes what looks like an ARB symptom is actually a line issue.

Brake bias: stability on entry

Brake bias comes last because it only makes sense to evaluate once pressure, camber, and ARB have already made the car predictable in steady-state cornering. Bias too far rearward locks the rear under trail braking; too far forward, the car won't rotate and you lose time waiting for the nose to turn in.

Anyone who still releases the brake abruptly mixes this symptom with a setup one. It's worth reviewing how to release the brake in proportion to steering input before changing the bias — otherwise you're adjusting the car to compensate for your hand.

Symptom on track, likely adjustment

Practical testing order

1. Lock in the hot pressure first, running a few laps and comparing all four tires before any other change.
2. Adjust camber based on temperature across the tire's band, one axle at a time.
3. Touch the anti-roll bar only afterward, comparing the same corner across consecutive laps to isolate the effect.
4. Review brake bias last, with the car already stable in corners, focusing on the track's hardest braking zones.

Common mistake: changing three things in the same run

Changing pressure, camber, and the bar in the same stint makes it impossible to know which change caused which effect. The gain from one might be masking the loss from another.

One adjustment per run, validated in the data before the next — that's what separates a tested setup from a guessed one.

To confirm whether the change actually helped, compare the same corner between the lap before and after the adjustment, phase by phase. If the difference disappears when you look at which corner is costing the most time in the lap, the adjustment didn't fix anything — it just changed the feel on the wheel.

How this changes by car and by track

In GT3 and GT4, the anti-roll bar usually has a wider adjustment range and more noticeable effect than in open-wheel cars with setups more locked down by regulation. On tracks with slow, technical corners, brake bias matters more than on tracks with fast corners, where the bar dominates the result.

A track with wide temperature swings throughout the day also changes priority: if the session heats up fast, revisiting pressure is worth more than chasing fine camber adjustments.

Where telemetry comes in

Feeling like the car “improved” after an adjustment is different from confirming it lap after lap. Laptics records telemetry automatically while you drive and compares laps by corner phase, showing whether the time gained or lost matches the adjustment you made — without needing to export anything manually.

Practical summary

• Pressure first: without it stable, no other data is reliable.
• Camber second: adjusts temperature distribution within an already correct range.
• Anti-roll bar third: solves the specific rotation-phase balance.
• Brake bias last: only makes sense once the car is already predictable in corners.