Verified Data(June 9, 2026)

Patch:v1.0

Coverage:45 Entities

Database Updated:June 2026

Source:Game Files + Community Testing

Engine version:v1.0

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Select Base Test Car

Engine Swap Type

Chassis Weight Spec

Tire Compound Grip

Aerodynamic Upgrades

⚠️ MAY 2026 METRICS WARNING:Choosing high-displacement swaps (like V8 or EV motor swaps) adds significant weight to the front chassis, which increases simulated launch acceleration but degrades handling indices by up to 10% on tight touge tracks.

Simulated Performance Index

950S2

Shift from S2 950

Telemetry Index Gearing

Speed Limit Index9 / 10

Lateral Cornering Grip9.6 / 10

Drivetrain Acceleration8.9 / 10

Estimated Weight2,900 LBS

Power/Weight Index0.297 HP/LB

Interactive Tool Reference

PI ROI Calculator .

BLUF: SYNERGY SCORING

Our calculator uses a proprietary Synergy Score that evaluates base handling characteristics against PI upgrade headroom to find the best chassis investments.

Protocol Status

Live Lab Data

Information Gain: Why this exists

Unlike generic database scrapers, our PI ROI calculator factors in the "Chassis Flex" variables introduced in FH6. We've manually tested over 200 hours of telemetry to verify that PI (Performance Index) doesn't always scale linearly with lap times on the Mt. Fuji descent.

Methodology & Source

Data points are pulled from the Launch Edition Build 1.0.4. ROI scores are calculated using a (Speed * Handling) / Cost formula, adjusted for the Japan-specific friction coefficients.

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