Porsche 963 GTP

TYRES

• Slick, Front 165 PSI, Rear 160 PSI, no blankets (iRacing GTP tyres come in cold, target hot pressure ~180-185 PSI F/R after out lap)

ELECTRONICS

• TC 3, TC2 (slip) off, ABS 6, Engine Braking Map 4, Brake Bias 54.5% (cockpit adjustable +/-2%)

SUSPENSION

• // FRONT
• Ride Height: 55 mm
• Wheel Rate FL / FR: 165000 N/m / 165000 N/m
• ARB: 850 N/m
• Brake Torque Multiplier: 100 %
• Brake Bias: 54.5 %
• // REAR
• Ride Height: 65 mm
• Wheel Rate RL / RR: 155000 N/m / 155000 N/m
• ARB: 650 N/m
• Diff Preload: 35 Nm
• Diff Coast: 0.45
• Diff Power: 0.6

DAMPERS

AERO

• Front splitter max attack (min legal front ride height), Rear wing 4° (low-drag qualifying trim for VIR's long straights while retaining S-curve stability), Downforce Level: Low-Medium (Track config "Low Downforce Road"), Brake ducts: Front 3 / Rear 3

KEY SETUP NOTE

• VIR Full punishes excess drag through the uphill Esses and long back straight kink — run the lowest wing angle that still lets you carry full commitment through Oak Tree and the Esses without snap oversteer; qualifying lap time here is won by straightline speed into Climbing Turn and NASCAR bend, not outright mid-corner grip.

TRACK GUIDE

• Turn 1 (Horseshoe): Brake extremely late from 175+ mph, trail brake deep to rotate the long-radius entry, get on power early for the run to the Esses.
• The Esses (Turn 3-5): Committed, minimal lift — use full aero platform, keep car flat with smooth steering inputs; a mistake here costs 3-4 tenths minimum.
• Oak Tree (Turn 7): Late apex, sacrifice min speed slightly to maximize exit onto the back straight — this is the longest full-throttle zone, exit traction is critical.
• Climbing Esses/NASCAR Turn (Turn 10-11): Uphill blind entry, commit to full throttle early, trust the aero — small lift here loses massive time to top speed on the front straight.
• South Bend (Turn 14) into front straight: Late apex exit priority over entry speed — this corner sets up the entire front straight, don't sacrifice exit for a tenth of entry speed.

THEORETICAL BEST LAP

• 1:48.900 — theoretical optimal sector composite, dry track, low-downforce qualifying trim, no traffic

REAL WORLD RECORD

• No official record (Porsche 963 GTP does not compete at VIR in IMSA/WEC calendar as of 2024)

SIM RACING RECORD

• 1:49.3xx — iRacing GTP class, VIR Full, community hotlap best estimate (dry, low downforce setup, official leaderboard sub