I won this quite easily (after failing 3 times using stock Mazda Touring Car with RH) Kokubun's car is very fast - he is capable of recording sub 1-min laps.
Here's my tune:
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Adjusted Ratios:
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Now I'm capable of 59 second laps:
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Very simple strategy:
- Fuel Map 1 for the whole race.
- 4 Pit stops
Pit 1: Racing Medium Tyres / Full Tank
Pit 2: Racing Medium Tyres / Full Tank (there will be a little rain but its fine)
Pit 3: Intermediates / Full Tank (Perfect weather for Intermediates and start of Heavy Rain)
Pit 4: Intermediates / Full Tank (you will face some heavy rain but DO NOT switch to Heavy Wet tyres as this rain is not around for too long - you will lose more time changing to/from Wet Tyres and it won't save you much time during the wet laps. You could lose a minute changing Tyres to gain maybe 10 seconds using Heavy Wet. Not worth it). Intermediates will be a little slower, but they will get you through the end of the race. This is where Kokubun loses the race, he switches to WET then goes back to SOFT - You stay Intermediates, do slower laps, but save 2 Pit stops.
When Kokubun goes into final Pit for Racing Soft, you can maybe switch to Fuel Map 6 just to avoid any last lap fuel issues.
Easy win:
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Aids: I only use TC1 / Difficulty: Normal / Transmission: Automatic.
The tune is very important - my car is very quick in the corners, top speed is low but enough for the Tskuba straight.