Rain can fall quick and hard at Spa and will ruin your race weekend if you aren’t prepared for the changing conditions.
The parc fermé rules mean that once qualifying starts you can only change a few parts of your setup, so keeping an eye on the weather forecast for the race is key to deciding which setup to use, but if the rain is pouring all weekend then don’t worry, we have a setup for you.
The Beligian Grand Prix, held at the wonderful Spa-Francorchamps circuit, can often fall foul of the weather despite being held in August, and online races love to throw rain at you, which can ruin your ranking if you aren’t ready.
So how should you set up your car for when the rain pours at Spa?
READ MORE: All F1 2019 setup guides
This setup is radically different from our dry one for Spa. When the rain comes down a lot of the flatout sections become tricky, and the racing line moves a lot. You go from leaning on mechanical grip to requiring a lot more aerodynamic performance.
We have gone with a 6-8 setting here to provide a lot more bite and stability. This is needed through corners like Eau Rouge and Pouhon that become a lot more challenging in the wet. This setting keeps you competitive up the Kemmel straight and the run through the final sector too.
Unlocking the differential is vital to stability in the wet. It stops a singular puddle from throwing you off, and the grip difference between wet asphalt and wet kerb/grass is even more stark and dangerous.
As a result we have fully unlocked the on-throttle differential to 50% to allow the rear tyres to rotate more independently as grip levels change.
The off-throttle differential is set at 70% which keeps the rears relatively close as you brake, making it more stable when you do put your foot on the loud pedal again.
Thanks to the rain we don’t really have to worry about tyres overheating. With Spa not testing the rubber too much anyway we can go to the most optimum geometry setting. That is a front camber of -2.50, a rear camber of -1.00, a front toe of 0.05 and a rear toe of 0.20.
This keeps cornering performance high, crucial in the middle sector, and with the long straights you can cool off the rubber. This will massively increase wear when the rain stops though, so be ready to change tyres quickly.
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