I have a Gen 2 base and the choice of either tune. I went with VF because of their longstanding history of working with the V10. I felt a difference across the rev range due to the additional torque and the top end has been opened up. I track the car and have before and after data to show what the VF tune, in isolation, result in. With no other changes to the car, I picked up 4mph on the back straight at VIR. That straight is a good barometer of the car and not the driver because of the slow corner leading into it.
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