[Nick Smitheram]

I can only assume you are talking about the Nissan  Primera race.
There is a minimum height it has to pass to be a valid setup if you put a lot of fuel in it will be too low.
What you can do is either increase the psi in the tires, though that can result in less grip but you can also increase the height of the car.

Sorry yes it was the primera race. Are other people doing this or just piting for more fuel?

Thanks