Forza Horizon 6
Tuning Guide

Grip Comes from the Tire Contact Patch

Each tire only touches the road over a small area — the contact patch. Everything your car does (turning, accelerating, braking) is the contact patch transmitting force to the road. More patch, evenly loaded, gives more grip.

Almost every setting in the tuning menu is, indirectly, about getting the best possible contact patch in the situation you care about. Tire pressure controls the patch's shape. Camber controls how flat it sits when you turn. Springs and dampers control whether the patch stays touching the road when the surface is uneven or when weight shifts. ARBs control how much weight transfers side-to-side. Once you internalise that, the rest is just bookkeeping.

The two ways a car can lose grip

• Understeer — the front tires lose grip first. The car wants to go straight even though you're turning the wheel. It "pushes" wide off the corner. Mnemonic: "under" = car turns less than you wanted.
• Oversteer — the rear tires lose grip first. The back end swings out and the car wants to spin. Mnemonic: "over" = car turns more than you wanted.

Both happen because one end of the car has relatively less grip than the other. That's the whole game: balance front grip against rear grip. Almost every setting nudges this balance one way or the other.

The Four Corner Phases

A corner isn't one event — it's four. Different settings dominate each phase, so when you have a problem, diagnose where in the corner it happens first.

The Golden Rules

Understeer Cards (car pushes wide, won't turn)

Oversteer Cards (rear breaks loose, snap or slide)

Other Problems

Parameter → Balance Direction Cheat Table

Tune in this order. Each step assumes the previous ones are done — for example, you can't sensibly tune dampers before springs because dampers need to match the spring rates.

1. Know your car. You need to know its drivetrain (does it drive the front wheels, rear wheels, or all four?), total weight, weight distribution (what percentage of weight sits on the front axle?), power output, the era it was built in, and what kind of suspension and tires are installed. These all change the right answers later — most steps below scale with these numbers.
2. Finish the whole baseline before balancing. Each step builds on the last, so there's nothing to test until the car is fully assembled. A quick shakedown lap is fine; real balance testing starts once the baseline is done.
3. Test & balance. Test where you'll actually race — a tune dialed in on an open highway will feel awful on a twisty circuit, and vice versa. Pick a track from the weekly challenges (or wherever you intend to compete) and run it as a Rivals event for consistent conditions. Then drive several laps, find the worst handling problem, use Balance & Fix-It to address it. One change at a time.
4. Track-specific tweaks (optional). Once your car is working well, you can shift the whole tune slightly toward "more cornering grip" for technical tracks (softer everything, max aero, shorter gears) or "more straight-line speed" for fast tracks (stiffer, less aero, longer gears). Most players don't need this until they're chasing the last tenths of a lap time.

Base Pressures by Compound

Picking the Right Compound

Tight technical tracks generate more friction — they reward upgraded compounds. Tracks with long high-speed straights keep tires cool, so cheaper compounds are fine and you can spend your performance budget elsewhere.

Rough guide by Performance Index class:

• D and C class: stock tires almost always.
• B class: stock tires most of the time. Street tires can work for very tight technical circuits.
• A class: usually street tires at minimum. Heavier and older A-class cars want semi-slicks; lighter modern cars can manage on street.
• S1 / S2: typically semi-slicks or race slicks. Rally tires sit between sport and semi-slick in PI cost but offer cornering grip closer to slicks — worth experimenting with on light, powerful cars.

Heavier and older cars want stickier tires to keep up on tighter tracks — older cars to compensate for their inferior factory suspension.

Starting Point

Manually Tuning Individual Gears (if needed)

If your build needs a fully custom transmission (which is rare on modern circuit-focused builds), here's the practical sequence:

1. Dial in 1st gear for launch. Find a flat stretch or use a Rivals event. Adjust either 1st gear or the final drive until launching produces a small amount of controllable wheel-spin. Too long and the car bogs before the powerband; too short and it just spins helplessly. This is especially important on AWD cars.
2. Set your target top speed using top gear. Find the highest speed you actually hit during a lap, then set top gear to extend 10-20 mph beyond that. This gives you headroom for slipstreaming without banging off the rev limiter.
3. Space the middle gears as a logarithmic curve. When you look at the gear ratio sliders on the screen, you want a curve that's more spread out at the bottom (1st-to-2nd is the biggest jump) and tighter at the top (last two gears can look nearly identical on the graph). The reason: air resistance grows exponentially with speed, so each higher gear naturally produces less acceleration even when ratios are similar.

Camber

Starting Point

Toe

Front Caster

Starting Point

Springs

Starting Point

You can use the spring rate calculator to help you as a starting point.

Ride Height

Starting Point

Starting Point

Heavier cars and stiffer springs need stiffer dampers. A car with 60% of its weight on the front needs stiffer front dampers than rear ones.

You can use the spring rate calculator to help you as a starting point.

Rear Dampers

Damper Behavior Reference

If you're confused about whether to soften or stiffen, this table tells you what each problem points at:

Starting Point

You almost always want both front and rear aero adjustable, or neither — running one without the other creates serious imbalance at speed.

Some body kits already include a front splitter (you may not be able to add another). You still usually pick a rear wing from the kit; which rear wing you choose is cosmetic — different looks, same downforce and tuning range.

Drivetrain Bias

Workflow

Power & Weight Adjustments

Starting Point

Two Philosophies of Brake Bias

The two starting points above come from different tuning approaches, not different car types:

• Philosophy A — Stability-first (forward bias). Front tires do most of the stopping. Predictable, hard to spin under braking. Best when you finish braking before turn-in.
• Philosophy B — Rotation-first (slight rear bias). Rear tires share more of the work. More overall braking force before the fronts lock; rotates more easily under trail-braking. Easier to make the rear step out — requires more skill.

Starting Values by Car Type

Diagnostic — Adjusting Brakes by Symptom

RWD

FWD

AWD

1. Older car = stiffer chassis tune, more conservative alignment & diff
2. Race car = softer chassis tune, more locked diff
3. Heavier car = stiffer springs and ARBs, more brake pressure
4. More power = lower final drive, downforce considerations at the 400 hp and 800 hp thresholds
5. Open-wheel = lower rear camber, more open diff (combats inherent understeer)
6. Grippier tires = stiffer setup; lower-grade tires = softer
7. Dirt = soft + understeer bias; Cross Country = stiffer + oversteer bias
8. Grip track = soft + oversteer bias + short gears + max aero
9. Speed track = stiff + understeer bias + long gears + min aero
10. Cold or wet = softer setup, more understeer bias, lower brake/diff lock

Build & Upgrades (before you tune)

Drag tuning starts in the upgrade shop, not the tuning menu. The build is most of the work.

• Engine swap. Most stock motors aren't viable for serious drag. Pick a swap with high power potential that matches your target class. For fastest times overall, AWD swaps are generally quicker off the line.
• Drivetrain. AWD = easier, faster launches. RWD = more skill required but lighter and authentic to many builds. Pick based on whether you want pace or character.
• Power. Max out engine upgrades to the limit of your target class.
• Suspension. Rally suspension is usually a solid starting point for drag — despite the name, it works well in most cases, though not always. Try it first and swap if it doesn't suit the build.
• Sway bars. Install both front and rear.
• Weight. Reduce weight as aggressively as the class allows. Skip bracing — it adds weight for handling benefits you don't need on a straight line. Race brakes are worth fitting here: they're lighter than stock, and on a straight line you don't need the stopping power, so the weight saving is the real win. A lighter bonnet/hood also shaves a few kg — swap it where one's available.
• Drivetrain parts. Best clutch, best driveshaft. For transmission, the 4-speed drift box is easier to tune since it has fewer gears, but any race transmission lets you shift without clutching in.
• Differential: any two-way adjustable diff — the base options behave nearly identically in-game.
• Aero. Removing rear wings gives a tiny advantage. If you're not chasing the absolute best time, keep what looks right.
• Wheels. Check the weight before installing. Wheel weight matters more than most people realize — go for the lightest set you can find, kept at a small diameter.
• Tires. Drag compound, widest rear, skinniest front.

Base Drag Tune

These are starting values — gear ratios get refined on the strip afterward.

Initial Gear Ratios

Before the first run, just get the graph filled out:

1. Drag top gear all the way to the right of the gear-ratio graph.
2. Bring every lower gear up to meet it so the curve looks evenly distributed.

That's your starting point. The strip does the rest of the tuning.

Fine-Tuning on the Strip

Iterative process. Change one thing, run the strip, compare time.

1. Tune 1st gear for the launch.

   • If the car bogs off the line → shorten 1st gear (smaller increments — adjustments of ~5 ticks are often already too much).
   • If the car spins helplessly → lengthen 1st gear back.
   • Goal: leaves hard with controllable wheelspin, builds into the powerband immediately.

2. Tune 2nd and 3rd for the rest of the quarter.

   • Watch your RPMs as you cross the finish line.
   • If you're not at the top of 3rd as you cross → shorten 2nd and 3rd until you are.
   • Why stop at 3rd? Leaving 4th alone keeps the car usable on longer straights and roll races without retuning.

Picking a Car

The drivetrain and engine layout matter more than the model. Make it easy on yourself first, get fancy later.

• Layout. Front-engine, rear-wheel drive is the most predictable and the easiest to learn on. Mid-engine and AWD can absolutely drift, but they're harder to control when starting out.
• Engine character. Pick a swap (or stock motor) where horsepower and torque are roughly similar. A peaky engine with far more hp than torque, or one with a huge spike, feels snatchy and unpredictable. Smooth, flat delivery = a car that's easy to hold sideways.
• Power level. Entirely your call. A chill cruiser can sit around 700-800 hp; serious builds run more. Less power is easier to learn on. Match your tire width to the power (more below).

Build & Upgrades (before you tune)

Like drag, a lot of the work is in the upgrade shop. Build backwards — start from the engine, since it dictates everything else.

• Engine / aspiration. Swap or keep stock to hit your target power with a smooth curve. Big single turbos make the most power but add turbo lag — that flat-then-spike delivery makes the car less stable. Twin-turbo, supercharger, or natural aspiration are more predictable. If you do run turbos, anti-lag smooths out the spike (and shoots flames).
• Drivetrain swap. Rear-wheel drive.
• Body kit & aero. Pure aesthetics — they don't affect drifting. Run whatever looks good, wing or no wing.
• Tires (compound). See the trade-off below.
• Tire width. Scales with power. Mid-power (~700 hp) sits comfortably around 245–285 front, 265–295 rear. More power → wider rears for grip; very low power → thinner for easier wheelspin. A square setup (same front/rear) is fine too.
• Wheels. Lighter is marginally better; size and style are aesthetic. Pick what looks right.
• Transmission. A race 6-speed is the easy recommendation. The dedicated 4-speed drift box is fewer gears to tune but isn't essential — skip it unless you're try-harding.
• Driveline. Max clutch and driveshaft.
• Differential. Install the drift differential.
• Platform & handling. Max brakes. Drift springs & dampers (slams the car and dials in camber automatically). Install front and rear anti-roll bars. Roll cage can subtly change grip in odd ways — most people leave it near stock. Run full weight reduction for agility.
• Engine upgrades. Max to your target power. Watch the camshaft — maxing it spikes hp without much torque, which hurts that smooth delivery. Watch turbos for the same reason.

Base Drift Tune

Starting values. Gears get refined on the road afterward (see below). This is a RWD setup.

Why these settings

• Rear tire pressure low — shrinks rear grip so the back rotates more easily. Rear tires heat up and gain pressure as they spin, so starting low lands in a usable range.
• Front camber maxed, rear pulled in — heavy front camber keeps the front biting through big steering angles; less rear camber keeps a usable rear contact patch.
• Toe out front — makes the car turn in sharper and feel livelier. More toe-out + more negative camber = snappier, less forgiving.
• Brake balance forward — lets you brake mid-drift without snapping the rear loose, which is essential for tandems and corner adjustments.
• Differential locked on accel — both rear wheels spin together, the single biggest factor in a predictable, consistent slide. The drift diff often sets this automatically.

Final Drive on the Road

Gearing is the one thing you can't tune without driving. Do it last.

1. Find a long straight. Come to a dead stop in your main drifting gear (often 3rd or 4th).
2. Floor it and watch the RPMs as the wheels spin up.
3. Goal: revs should climb to near redline but not bounce off the limiter in that gear.
4. Too short (bouncing off the limiter)? Move final drive slightly toward top speed.
5. Too tall (revs fall well short of redline)? Move final drive toward acceleration.
6. Tune the final drive only — adjusting it scales every gear, so the gears either side of your main one come out drift-ready automatically.