Free Setup Guide
Ray Formula 1600
Tsukuba Circuit - 2k Full
iRacing
Updated Oct 7, 2026
// Hot Lap · Dry
TYRES
- Slick, Front 110 PSI, Rear 105 PSI, no tyre blankets (cold set, car has no heaters)
ELECTRONICS
- TC: N/A (no TC on car), ABS: N/A (no ABS - car note confirms), Engine Braking Map: 4 (aggressive, aids rotation on trail-brake), Brake Bias: 54.0% front
SUSPENSION
- // FRONT
- Ride Height: 30 mm
- Wheel Rate FL / FR: 28000 N/m / 28000 N/m
- ARB: 1200 N/m
- Brake Torque Multiplier: 100%
- Brake Bias: 54.0%
- // REAR
- Ride Height: 35 mm
- Wheel Rate RL / RR: 24000 N/m / 24000 N/m
- ARB: 900 N/m
- Diff Preload: 30 Nm
- Diff Coast: 0.6
- Diff Power: 0.4
DAMPERS
| Slow Bump | Slow Rebound | Fast Bump | Fast Rebound | |||||
|---|---|---|---|---|---|---|---|---|
| FL | 3200 Ns | m | 4800 Ns | m | 1600 Ns | m | 2400 Ns | m |
| FR | 3200 Ns | m | 4800 Ns | m | 1600 Ns | m | 2400 Ns | m |
| RL | 2800 Ns | m | 4200 Ns | m | 1400 Ns | m | 2100 Ns | m |
| RR | 2800 Ns | m | 4200 Ns | m | 1400 Ns | m | 2100 Ns | m |
AERO
- Front Wing: 8 (max attack angle), Rear Wing: 9 (max downforce — Tsukuba is tight and twisty, low-speed grip trumps straight-line speed), Downforce Level: Maximum available, Brake Ducts: N/A on this car
KEY SETUP NOTE
- Tsukuba's tight hairpins (Turn 1, Turn 3, Final Corner) demand maximum low-speed rotation — run softer coast diff (0.6) and slightly higher rear ride height split to encourage the rear to rotate on trail-braking; with a formula car's low mass and high downforce, sacrificing a bit of top-speed aero efficiency for max wing angle pays off lap time here since there's no long straight to exploit a low-drag setup.
TRACK GUIDE
- Turn 1 (hairpin after start/finish): brake extremely late, trail-brake deep and rotate the car on entry — exit traction onto the back straight is the biggest lap time gain of the lap
- Turn 3 (tight right-hander): use full kerb on exit, get back to throttle progressively — the diff power setting (0.4) prevents snap oversteer here
- Esses (mid-sector): carry momentum, minimize steering corrections — this is a rhythm section, smoothness beats aggression
- Final hairpin: this is the most critical corner for overall lap time — a clean, late apex sets up maximum speed onto the front straight; any mistake here costs 2-3 tenths minimum
- Kerb usage: Tsukuba's kerbs are aggressive — use them only at Turn 1 exit and Esses, avoid unsettling the car elsewhere given the stiff springs needed for aero platform stability
THEORETICAL BEST LAP
- 0:49.800 — estimated optimal based on combined best sector times, dry track, soft tyres at peak grip window
REAL WORLD RECORD
- No official record (Ray FF1600
Need different conditions?
This guide was generated by our AI setup engineer. Get a fresh setup for your exact session — wet or dry, hot lap or race distance — in about 20 seconds. Your first 3 setups are free, no account needed.
Drive this setup with a coach on your radio
The free TheTenths Client works with iRacing: while you drive, it logs every valid lap to the leaderboard and puts an AI coach on your radio, calling brake points and catching mistakes corner by corner.