Tuning calculator
Enter four things about your car and get a full starting tune in seconds. Spring rates are physics based from your weight, the rest are proven community baselines for each discipline. Copy the sheet straight into the in-game menu, then use the handling problem solver to dial it in.
New to tuning? Read the full tuning guide to learn what every setting does.
- Springs
- Physics based
- from your weight
- Disciplines
- 4
- road to drag
- Quick starts
- 5
- one-tap presets
Weight distribution
Spring rate
lb/inNose-heavy, so the front runs the stiffer spring. Stiff and flat for smooth tarmac. Low ride height, firmer springs and higher pressure keep the car sharp and planted through fast corners.
Tyres
Springs
Damping
Anti-roll bars
Alignment
Differential
Balance targets
FH6 shows mechanical and aero balance as values from 0 to 1, where 0.50 is neutral. Above 0.50 is oversteer-prone, below is understeer-prone. Aim the in-game readout toward these.
Neutral. Nudge toward 0.52 for sharper rotation, lower for stability.
Even front and rear downforce for predictable grip at speed.
Gearing
Set the final drive so top gear tops out near the end of the longest straight, then tighten lower gears to stay in the power band.
Planning which parts to fit before you tune? Use the tune builder to weigh each upgrade, then come back here for slider baselines.
This is a starting tune, not a guaranteed optimum. Forza Horizon 6 physics and your driving style matter, so test on track and adjust. Stiffen for grip and response, soften for stability and bumps.
Handling problem solver
Got a baseline tune but the car still fights you? Pick the problem you feel and get the fixes that move it most, ordered from highest leverage down.
Pushes wide mid-corner
The front tyres give up before the rear, so the nose runs wide of your line.
Soften the front bar or stiffen the rear.
Drop a little front pressure for more front grip.
Lower the acceleration lock to free up corner exit.
Add front downforce or trim the rear wing.
Change one thing at a time and test on the same corner. Anti-roll bars and the differential shift balance the most, so they lead each list.
How these numbers are derived
We are honest about which values are physics and which are experience. Nothing here is a fabricated in-game stat.
Physics: spring rates
Springs come from the natural-frequency model used across sim racing: rate scales with the sprung weight each corner carries and a target ride frequency. Stiffer disciplines aim for a higher frequency.
- Road
- 2.6 Hz
- Dirt
- 1.8 Hz
- Drift
- 2.3 Hz
- Drag
- 2.1 Hz
Baselines: everything else
Anti-roll bars, bump and rebound damping, alignment, tyre pressure, ride height and the differential are proven community starting points, shifted by your discipline and drivetrain. They are a fast, sensible base to test from, not simulated optima.
- Damping starts with rebound a touch stiffer than bump.
- Drivetrain nudges the bars and differential lock.
- Dirt runs softer, taller and lower pressure than road.
Frequently asked
How accurate is the tuning calculator?
Spring rates are calculated from your car's weight using the standard natural-frequency model used across sim racing, so they are a strong baseline. Anti-roll bars, damping, alignment, pressure and the differential are proven community starting points by discipline and drivetrain. Treat the output as a fast starting tune and fine-tune to your car and style.
Where do I find my car's weight?
Open the car in the Upgrades and Tuning menu. The weight in pounds is shown with the car's stats, and it updates as you fit weight-reduction parts.
Why does front weight matter?
Spring rates scale with the weight each axle carries. A nose-heavy car needs stiffer front springs, so entering the correct front weight balance gives a more accurate result.
How do I quickly fix understeer or oversteer?
Understeer is the front washing wide: soften the front anti-roll bar or stiffen the rear, drop a little front tyre pressure, or lower the acceleration differential lock. Oversteer is the rear stepping out: do the opposite. The handling problem solver on this page walks each symptom through its highest-leverage fixes in order.
What is the difference between this and the tune builder?
The tune builder helps you decide which parts to fit. This tuning calculator gives you slider starting points for springs, dampers, anti-roll bars and the rest once those parts are on the car. Plan the build in the tune builder, then set it up here.
Should I use imperial or metric units?
Match whatever your game is set to. Forza shows weight in pounds or kilograms depending on your units, and the spring, ride height and pressure values switch with the units toggle so the numbers read straight into the in-game menu.