FH6 Tuning Template

Vehicle Telemetry

Enter your core vehicle parameters — all other tabs update automatically from these inputs.

Vehicle Identity

Make

Model

Target PI Class

Drivetrain

Engine & Mass

Power (HP)

Torque (ft-lb)

Curb Weight (kg)

Front Weight Dist %

Displacement (L)

Circuit Type

Dynamics

Lateral G @ 60 MPH

Lateral G @ 120 MPH

Top Speed

Mechanical Balance

Aero Balance

Aero Efficiency

Build Mode

Computed Metrics

Power-to-Weight

—

Front Axle Load

—

Rear Axle Load

—

Torque / 100kg

—

Rec. Compound

—

Aero Dependency

—

Telemetry Target Windows

Mechanical Balance Index0.50– 0.60/span>

Aerodynamic Balance Index0.40 – 0.45

Hot Tyre Pressure28.0 – 32.5 PSI

Aero Efficiency≥ 0.83

ARB Balance0.50 – 0.60

Tyre Compound Reference

Compound	Base Window	Mass Scaling	Drivetrain Split	PI Class
Slick	28.0 - 32.5 PSI	+1 PSI per 150kg	RWD: F +0.5	S / R
Semi-Slick	27.0 - 29.5 PSI	600kg car: ~29 PSI	FWD: F +1.5	A
Sport	24.0 - 26.5 PSI	1800kg car: ~34 PSI	AWD: Symmetrical	B
Street	24.0 - 26.5 PSI	—	Drift: ~20 PSI low	C
Stock	24.0 - 26.5 PSI	—	—	D
Rally/Off-Road	15.5 - 21.0 PSI	Low footprint	Max Compliance	Rally

Upgrades Guide

Follow phases 1–5 in order. Highlighted options are dynamically recommended based on your vehicle configuration.

FOUNDATIONS

Tyres, Track Width · Establish contact patch & mitigate wheel spin

Essential ▾

1.1ENGINE SWAP

Drop in a high-efficiency engine platform. This replaces your car class and sets baseline power-to-weight ratio.

STOCK (Default Architecture) HIGH-EFFICIENCY REPLACEMENT PLATFORM

1.2DRIVETRAIN SWAP

Convert based on use case. Stock configurations save significant performance budget index metrics.

STOCK (Maintain Factory Configuration) AWD SWAP (Optimal for S1/S2 Class & Rally)

1.3TYRE COMPOUND

Match compound tiers directly to target PI to avoid unnecessary performance index bloat.

STOCK COMPOUND (D-Class Floor) STREET COMPOUND (C-Class Target) SPORT COMPOUND (B-Class Target) SEMI-SLICK COMPOUND (A-Class Target) SLICK COMPOUND (S1/S2/R-Class Grip) DRIFT COMPOUND RALLY COMPOUND

1.4TYRE WIDTH

Expanding the contact patch directly mitigates wheel spin and optimizes braking stability. Recommended widths vary by drivetrain configuration.

	RWD	AWD	FWD
FRONT	Min / +1 if mid-corner push	+1 / +2 / Max	MAX
REAR	MAX	MAX	+1 / +2

1.5TRACK WIDTH

Max out wheel spacers on both ends for a wider stance and better lateral stability. Always maximum on both axles.

FRONT: MAXREAR: MAX

PLATFORM & HANDLING

ARBs, Suspension, Weight Reduction, Brakes, Differential

Essential ▾

2.1ANTI-ROLL BARS

Front and Rear ARBs cost nearly 0 PI but are essential for tuning out understeer/oversteer. Required to unlock all ARB adjustment sliders.

FRONT: RACEREAR: RACE

2.2SPRINGS & DAMPERS

Unlocks alignment, ride-height geometry, and compression stiffness ranges.

RACE SUSPENSION DRIFT SUSPENSION RALLY SUSPENSION

2.3WEIGHT REDUCTION

Removing mass provides an instantaneous F=ma boost: better acceleration, shorter braking distances, lower lateral inertia. Prioritize Race-level.

STOCKSTREETSPORT RACE ← Highest Priority

2.4BRAKING

Mitigates thermal fade and permits delayed corner entry braking thresholds.

STOCK / SPORT BRAKES (Low PI Configurations) RACE BRAKES (Essential for A-Class & Above)

2.5DIFFERENTIAL

Unlocks acceleration and deceleration lock sliders — essential for controlling corner entry/exit behavior and traction.

STOCK · D STREET · C SPORT · B RACE · A+ RALLY DRIFT

ENGINE & POWER DYNAMICS

Optimize breathing, internals, and thermal efficiency based on PI Class targets

Class-Dependent ▾

3.1INTAKE

Maximizes airflow footprint. Essential for low-tier builds; less prioritized in top classes.

RACE (High priority for low PI limits) SPORT / STOCK (Preserve PI for internals)

3.2INTAKE MANIFOLD / THROTTLE BODY

Improves top-end throttle response. Optimized for speed circuits.

RACE STOCK / SPORT

3.3FUEL SYSTEM

High flow ceiling parameters. Essential to support high-tier internal setups.

STOCK (Unused power overhead) SPORT (Perfect mid-tier tuning stepping stone) RACE (Mandatory for extreme delivery metrics)

3.4IGNITION

Slightly alters timing curves. Good filler for tight performance envelopes.

SPORT (Cost-efficient filler option) RACE (Ensures spark stability at high RPM fields)

3.5EXHAUST

Drastically removes weight and backpressure metrics. Always drop weight first.

SPORT (Light structural weight relief) RACE (Massive weight reduction & performance flow)

3.6CAMSHAFT

Shifts the powerband upward and raises rev limit ceilings. Bad for rally.

SPORT (Maintains drivable power application) RACE (Massive top-end horsepower potential) STOCK / STREET (Preserves loose surface torque extraction)

3.7VALVES

Improves valvetrain efficiency. Good mid-tier build optimization points.

STOCK (Not required for mild setups) SPORT (Excellent cost-per-horsepower optimization) RACE (Unlocks peak mechanical limits)

3.8DISPLACEMENT

Increases raw engine size. Generates massive immediate torque across the low-to-mid range.

RACE (Torque dominance out of slow corners) RACE (Essential displacement scalability) SPORT (Balances top speed wind-up profile)

3.9PISTONS & COMPRESSION

Boosts engine response. Highly rated performance index efficiency values.

STOCK (Avoid performance index bloat early) RACE (Sharp compression cycle execution)

3.10COOLING & FLYWHEEL

Cooling adds heavy thermal mitigation weight. Flywheel drops inertia weight.

STOCK COOLING + RACE FLYWHEEL (Preserve lightweight profiles) RACE COOLING + RACE FLYWHEEL (Mandatory thermal engine health limits)

AERODYNAMICS & DRIVETRAIN

Wings, Gearbox, Clutch, Driveline · Track-dependent setup

Track-Dependent ▾

4.1FRONT BUMPER / SPLITTER

Adjustable front wing adds downforce at the cost of top-speed drag profile.

STOCK (Preserve Drag Coefficients / Straight Speed) ADJUSTABLE RACE SPLITTER

4.2REAR WING

Adding a race rear wing introduces drag which can DROP your PI by 2–5 points — immediately granting budget for more raw engine horsepower.

RACE (PI neutral / negative)

4.3TRANSMISSION

Each extra gear in a 6/7/8/10-speed adds tiny weight, which can decrease your PI — giving headroom for another engine upgrade.

STOCKSTREETSPORT RACERACE n-SPEED

4.4CLUTCH

Decreases shift times with near-zero power impact. Use to absorb a single stray PI point precisely.

STOCKSPORT (Precision PI spend)RACE

4.5DRIVELINE

Reduces rotational mass along the driveshaft. An incredibly precise tool for spending final 1–2 leftover PI points.

STOCKSPORT (Final PI spend)RACE

OPTIMISATION

Rims, Rim Style, Chassis · Fine-tune PI to exact target

PI Precision ▾

5.1RIM SIZE

Increasing rim diameter adds wheel weight and thins the tire sidewall — steps PI incrementally up or down. Use for fine PI targeting.

FRONT: MAX (Race)REAR: MAX (Race)STOCK (Rally)

5.2RIM STYLE

Weight tiers let you add or drop exactly 1–7 PI points. Precision tool for final PI targeting.

STYLE 1 (Default)STYLE 2 · −4kg, PI+2 STYLE 3 · −9kg, PI+3STYLE 4 · −14kg, PI+4 STYLE 5 · −18kg, PI+7

5.5CHASSIS REINFORCEMENT ⚠

Do NOT upgrade unless absolutely needed to lower PI on a car slightly over class limits. Adds top-heavy weight and hurts chassis responsiveness.

STOCK (Race) ← Recommended STREET (Rally) SPORT (Rally) RACE (Rally)

Tuning Matrix

Enter your in-game MIN / MAX slider limits. Tune values are calculated live from your vehicle telemetry and build mode.

Min / Max Slider Limits

Component

Front Min

Front Max

Rear Min

Rear Max

Anti-Roll Bars

Springs

Ride Height

Damping Rebound

Damping Bump

Aero Downforce

Live Balance Indicators

MECHANICAL BALANCE (ARB Front / Total)

← Oversteer / RotationStable Understeer →

Target Zone: 55% – 65% · Current: —

AERODYNAMIC BALANCE (Aero Front / Total)

← Front-HeavyRear-Heavy →

Target Zone: 40% – 45% · Current: —

Calculated Tune Settings

ParameterFRONTREAR

TYRES

Pressure (PSI)

RWD - Front slightly higher than rear, often by 0.5 - 1.0 PSI. Higher front = sharper turn-in. Lower rear = more contact patch for putting power down on corner exit.

AWD - Equal pressure front and rear. Power is distributed equally to all four wheels.

FWD - Front higher than rear by 1.0 - 2.0 PSI. The front does all the work so higher pressure keeps it shape-stable under load. Lower rear gives the unloaded rear more compliance.

DRIFT - Both ends low (around 20 PSI), with the rear typically the same as the front or slightly lower.

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ALIGNMENT

Camber (°)

—

Toe (°)

—

Caster (°)

—

ANTI-ROLL BARS

ARB Value

—

SUSPENSION SPRINGS

Spring Rate

—

Ride Height

—

DAMPING

Rebound

—

Bump

—

AERODYNAMICS

Downforce

—

BRAKES

Balance %

—

Pressure %

—

DIFFERENTIAL

Accel Lock %

—

Decel Lock %

—

Fine Tune

Trackside optimization guide. Select your handling symptom below for an ordered, prioritized fix sequence.

Understeer — Car Pushes Wide / Refuses to Rotate

Oversteer — Rear Breaks Loose / Slides / Snaps

Chassis & Surface Anomalies

Build Correction Engine

Step 1 · Verify Tyre Footprint

Entry understeer or weak braking grip? Check tyre width. Increase Front Tyre Width by 1–2 increments, or upgrade brakes to prevent micro-locking.

Step 2 · Assess Compound Ceiling

Sliding uniformly in every sector? You've hit the absolute friction limit. Upgrade the compound tier: Stock/Street → Semi-Slick → Slick

Step 3 · Evaluate PI Allocation

Handles well but sluggish on straights? Your compound may be draining too much PI. Drop one compound tier, maximize track width instead, and reallocate PI to raw engine power.

Step 4 · Validate Telemetry Targets

Mechanical Balance Index0.50– 0.60/span>

Aerodynamic Balance Index0.40 – 0.45

Hot Tyre Pressure (Slick)28.0 – 32.5 PSI

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Quick Reference — Slider Direction Effects

Parameter	Increase (→) Causes	Decrease (←) Causes	Domain
Front Tyre PSI	Entry / Mid Understeer	More Front Apex Grip	Mid-Corner
Rear Tyre PSI	Mid / Exit Oversteer	More Rear Drive Grip	Mid + Exit
Front Camber (−)	More Front Grip	Front Understeer	Mid-Corner
Rear Camber (−)	More Rear Grip	Rear Oversteer	Mid + Exit
Caster	Stability + Dynamic Camber	Lazy Turn-in	Entry + Mid
Front Toe-Out	Sharper Turn-In	Lazier Turn-In	Corner Entry
Rear Toe-In	High-Speed Stability	Increased Rotation	Corner Exit
Front ARB	Understeer	Oversteer	Mid-Corner
Rear ARB	Oversteer	Understeer	Mid-Corner
Front Springs	Understeer	Oversteer	Entry + Mid
Rear Springs	Oversteer	Understeer	Mid + Exit
Front Ride Height	Understeer (High CG)	More Front Bite	Mid-Corner
Rear Ride Height	Oversteer (High CG)	More Rear Squat	Mid-Corner
Front Rebound	Entry Understeer	Entry Oversteer	Corner Entry
Rear Rebound	Entry Oversteer	Entry Understeer	Corner Entry
Front Bump	Less Dive Under Braking	Severe Nose Dive	Corner Entry
Rear Bump	Sharp Power Oversteer	Better Exit Traction	Corner Exit
Front Downforce	More Hi-Speed Aero Grip	High-Speed Understeer	High-Speed
Rear Downforce	More Hi-Speed Stability	High-Speed Oversteer	High-Speed
Brake Bias	Front Stability	Trail-Brake Rotation	Braking + Entry
Diff Accel	Power Oversteer	Open Diff / Slip	Corner Exit
Diff Decel	Coasting Understeer	Trail-Brake Oversteer	Corner Entry