Okayama FIA F4 iRacing Track Guide: Official Baseline Data
This guide is built from the exact Valor Official Baseline for Okayama International Circuit — Full Course + FIA F4. It is not a generic track description and it is not reconstructed from internet braking markers. The numbers below come from the canonical baseline CSV, the reviewed Valor corner map and the corresponding turn profiles in the September 5 Valor data pack.
Turn numbering follows Valor's reviewed map for this exact layout. Baseline speed is converted from the recorded meters-per-second trace to mph. Brake and throttle are the recorded 0–100% channels. Conditions, setup, fuel, tire state and driving line can move the exact targets, so use the data as a measured reference rather than a command to copy blindly.
Baseline snapshot
Mapped turns: 11
Meaningful brake events: 7 of 11 turns
No-brake / flow sections: 4
Peak speed in the reference trace: about 132.9 mph
Telemetry-integrated reference time: approximately 1:26.95
Average turn-profile confidence: 100.0/100
Heaviest brake zones: Turn 4 92.9%, Turn 5 85.5%, Turn 1 80.4%
Largest recorded speed reduction: Turn 5, roughly 132.9 → 48.2 mph
Slowest mapped minimum: Turn 5 at about 48.2 mph in gear 2
The integrated time is calculated from the reference trace's recorded position and speed because the distributed baseline CSV does not contain the simulator's lap-clock channel. Treat it as a telemetry-derived reference time, not an official iRacing timing result.
What the baseline says about this combination
Okayama alternates fast flow with very clear braking commitments. Turn 1 and Turn 4 both begin from roughly 130 mph and reach nearly identical 75 mph minimum speeds, but Turn 4 uses the heaviest brake pressure on the lap at 92.9%. That makes it a useful comparison corner: similar speed targets do not necessarily mean identical pedal execution.
Turn 5 is the defining stop. The reference falls from about 132.9 mph to 48.2 mph, the largest speed reduction and the slowest mapped minimum of the lap. Full throttle does not arrive until roughly 27 m after minimum speed, so the baseline is prioritizing rotation and exit shape rather than forcing power immediately.
Later, Turns 8 and 9 run at roughly 50 and 53 mph minimum before Turn 10 returns to a no-brake flow corner. The lap rewards drivers who can be patient in the slow sections without carrying that caution into the faster transitions.
Turn-by-turn baseline guide
Turn 1 — right
This is a firm braking zone. The baseline begins the brake event at roughly 130.1 mph, peaks at 80.4% brake, reaches about 75.4 mph in gear 3, and exits the mapped segment around 94.0 mph. Brake release is complete roughly 26 m before minimum speed, so the reference finishes most of the deceleration before the slowest point rather than dragging heavy brake deep into the corner. Full throttle arrives about 5 m after minimum speed, so exit preparation matters more than forcing the pedal early.
Turn 2 — left
The reference uses no meaningful brake input here. It carries about 95.6 mph in gear 4 and builds to about 108.2 mph by the mapped exit. If your trace shows a clear brake spike, first check line, steering load and whether the previous corner has left the car out of position.
Turn 3 — left
The reference uses no meaningful brake input here. It carries about 112.5 mph in gear 5 and builds to about 125.1 mph by the mapped exit. If your trace shows a clear brake spike, first check line, steering load and whether the previous corner has left the car out of position.
Turn 4 — right
This is a major braking zone. The baseline begins the brake event at roughly 130.2 mph, peaks at 92.9% brake, reaches about 75.4 mph in gear 3, and exits the mapped segment around 98.8 mph. Brake release is complete roughly 14 m before minimum speed, leaving a short transition into the slowest point. Full throttle arrives about 3 m after minimum speed, so exit preparation matters more than forcing the pedal early.
Turn 5 — right
This is a major braking zone. The baseline begins the brake event at roughly 132.9 mph, peaks at 85.5% brake, reaches about 48.2 mph in gear 2, and exits the mapped segment around 64.5 mph. Brake release is complete roughly 8 m before minimum speed, leaving a short transition into the slowest point. The reference waits about 27 m after minimum speed before reaching full throttle, a sign that power is being built patiently rather than forced.
Turn 6 — left
The reference uses no meaningful brake input here. It carries about 69.2 mph in gear 3 and builds to about 69.5 mph by the mapped exit. If your trace shows a clear brake spike, first check line, steering load and whether the previous corner has left the car out of position.
Turn 7 — left
This is a light-brake speed-management corner. The baseline begins the brake event at roughly 87.2 mph, peaks at 17.2% brake, reaches about 75.4 mph in gear 3, and exits the mapped segment around 92.7 mph. Brake release is complete roughly 30 m before minimum speed, so the reference finishes most of the deceleration before the slowest point rather than dragging heavy brake deep into the corner. The reference waits about 32 m after minimum speed before reaching full throttle, a sign that power is being built patiently rather than forced.
Turn 8 — left
This is a firm braking zone. The baseline begins the brake event at roughly 107.1 mph, peaks at 79.9% brake, reaches about 49.9 mph in gear 2, and exits the mapped segment around 50.1 mph. Brake release is complete roughly 12 m before minimum speed, leaving a short transition into the slowest point.
Turn 9 — right
This is a light-brake speed-management corner. The baseline begins the brake event at roughly 71.2 mph, peaks at 23.8% brake, reaches about 53.2 mph in gear 2, and exits the mapped segment around 73.3 mph. Brake release is complete roughly 25 m before minimum speed, so the reference finishes most of the deceleration before the slowest point rather than dragging heavy brake deep into the corner. The reference waits about 44 m after minimum speed before reaching full throttle, a sign that power is being built patiently rather than forced.
Turn 10 — right
The reference uses no meaningful brake input here. It carries about 89.3 mph in gear 4 and builds to about 101.9 mph by the mapped exit. If your trace shows a clear brake spike, first check line, steering load and whether the previous corner has left the car out of position.
Turn 11 — right
This is a speed-management braking zone. The baseline begins the brake event at roughly 107.6 mph, peaks at 45.7% brake, reaches about 80.6 mph in gear 3, and exits the mapped segment around 97.3 mph. Brake release is complete roughly 29 m before minimum speed, so the reference finishes most of the deceleration before the slowest point rather than dragging heavy brake deep into the corner. Full throttle arrives about 2 m after minimum speed, so exit preparation matters more than forcing the pedal early.
How to use this guide in Valor
The fastest way to use these numbers is not to memorize every speed before you drive. Pick one corner, complete a clean lap, and compare the trace.
At Okayama, use Turn 5 as a diagnostic anchor. If your minimum speed is close to the reference but your exit is weak, inspect how the car rotates and how cleanly throttle builds. If you are faster into the corner but slower down the following section, the extra entry speed probably did not create useful lap time.
Read How to Analyze iRacing Telemetry, browse Valor Baselines, or explore Valor.
This week's FIA F4 track guides
Also running FIA F4 this week? See the Virginia FIA F4 iRacing Track Guide and the Winton FIA F4 iRacing Track Guide.
Data basis: Valor canonical data pack 2026.09.05.01, exact combo okayamafull_fullcourse_formulair04. Only combinations present in the official Valor baseline registry are used for this Track Guide series.
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