Toyota GR86

TYRES

• Compound: Medium slick (spec tyre, no compound choice in GR86 fixed series — treat as standard)
• Front Pressure: 30.5 PSI (hot target 34.5–35.5 PSI)
• Rear Pressure: 29.5 PSI (hot target 33.5–34.5 PSI)
• Optimal operating temperature: 80–95°C for maximum grip; avoid exceeding 105°C to prevent thermal degradation over a race stint
• Cold set slightly lower on RR/RF (30.0 PSI) to account for higher thermal load from West Bend chicane's hard right-left transition

ELECTRONICS

• TC: 4 (aggressive but safety net for hard kerb use)
• ABS: N/A (GR86 has no ABS adjustment in this iRacing model — fixed factory ABS)
• Engine Braking / Brake Magic: N/A (not adjustable on this car — fixed drivetrain overrun)
• Brake Bias: 58% front

SUSPENSION

• // FRONT
• Ride Height: 115 mm
• Wheel Rate FL / FR: 26000 N/m / 26000 N/m
• ARB: 12000 N/m
• Brake Torque Multiplier: 100%
• Brake Bias: 58%
• // REAR
• Ride Height: 120 mm
• Wheel Rate RL / RR: 22000 N/m / 22000 N/m
• ARB: 8000 N/m
• Diff Preload: 40 Nm
• Diff Coast: 0.6
• Diff Power: 0.5

DAMPERS

AERO

• Front splitter: N/A (fixed spec bodywork)
• Rear wing: fixed spec — no adjustment available
• Downforce level: fixed (spec class car)
• Brake ducts: fully open (max cooling) — front and rear set to 6/6 for endurance/race stint tyre and brake temp control

KEY SETUP NOTE

• The West Bend Chicane's compression and quick direction change punishes soft rear damper settings — the slightly stiffer rear rebound keeps the car planted on corner exit onto the front straight, which is the biggest overtaking/lap-time zone at Lime Rock; sacrificing a bit of chicane rotation for straight-line stability pays off over a full stint.

TRACK GUIDE

• Turn 1 (Big Bend): Brake late but progressively — trail brake to rotate the nose, aggressive drivers can carry noticeably more min-speed than they expect on the spec tyre before it steps out.
• West Bend Chicane: Sacrifice a strict racing line for a straighter through-speed path — clipping the inside kerb hard unsettles the rear on corner exit; use only light kerb contact to protect tyre wear over a race distance.
• Uphill Esses: Smooth, progressive inputs — mid-corner grip here degrades fastest on aggressive stints, so manage tyre temps by not overdriving entry.
• No Name Straight into Right/Left complex: Late braking here is where places are won — the GR86's low power means track position through braking zones matters more than outright corner speed.
• Fuel/tyre management: Short-shift by 200 RPM in the final third of a long stint