Rss Gtm Mercer V8

TYRES

• Compound: Dry Hard (H)
• Front: 26.0 PSI cold (targets ~29–30 PSI hot)
• Rear: 26.2 PSI cold (targets ~29–30 PSI hot)
• No tyre blankets assumed — first lap must build temp quickly; slightly lower cold fronts to account for faster heat build-up under hard braking into T1.

ELECTRONICS

• TC: 2
• ABS: 2
• Engine Braking: 4 (mid-high, stabilize rear on trail-braking into slow corners)
• Brake Bias: 68.5% front (moved slightly forward from recorded 68.0% to compensate cooler/dry conditions giving more front grip and allowing deeper late-braking without locking rear)

SUSPENSION

• // FRONT
• Ride Height: 55 mm
• Wheel Rate FL / FR: 145000 N/m / 145000 N/m
• ARB: 120000 N/m
• Brake Torque Multiplier: 100%
• Brake Bias: 68.5%
• // REAR
• Ride Height: 60 mm
• Wheel Rate RL / RR: 130000 N/m / 130000 N/m
• ARB: 95000 N/m
• Diff Preload: 60 Nm
• Diff Coast: 0.4
• Diff Power: 0.6

DAMPERS

AERO

• Front Splitter: 4 (of typical 0–6 range)
• Rear Wing: 6 (of typical 0–9 range)
• Balance target: slight rear bias for stability through Portimão's elevation changes and high-speed Turns 1, 5, and 13
• Brake Ducts: 2 front / 2 rear (minimal — single lap, no thermal concern)

KEY SETUP NOTE

• Portimão's blind crests and off-camber apexes (T1, T8, T13) punish a car that isn't planted on initial turn-in; running slightly more front ARB stiffness than rear with firm (but not extreme) wheel rates keeps the platform flat over the elevation changes without sacrificing front bite on the uphill-to-downhill transitions.

TRACK GUIDE

• T1 (Turn 1): approach is blind over a crest — commit to late braking only once confident in reference points; trail brake lightly to rotate, as this sets up the entire lap.
• T5 (Curva do Boxes): high-speed, slight compression — stay full throttle if setup is confident; a twitchy rear here costs multiple tenths.
• T8 (Turn 8, Sucessivas chicane sequence): compromise through the esses; sacrifice ultimate minimum speed in T8a for better exit onto T9/T10, since the esses are a rhythm section, not isolated corners.
• T13 (final corner): critical traction zone onto the pit straight — get the car rotated early, use the diff power lock to put power down progressively without snap oversteer, as the straight is long and exit speed is the biggest lap time gain of the circuit.
• Kerb usage: Portimão's kerbs are aggressive — use sparingly at T1 and T13 exit; too much kerb unsettles this chassis given its relatively soft-for-aero-grip damper tune.