Last week I went down to visit Virgin Racing Technical Director Nick Wirth at his Wirth Research headquarters in Oxfordshire, which this year designed and developed the first digital F1 car, entirely conceived using CFD with no wind tunnel. It’s been a rollercoaster ride for Virgin, which started the season with chronic unreliability and a fuel tank which wasn’t big enough. Solving the reliability issues delayed performance upgrades until Silverstone and here Wirth admits that there was some nervousness within the team around Valencia. But recently they have added performance to the car, Wirth says that his group has added More…