I notice that the 2004 regs allow different (ie bigger) restrictors the heavier the car.... this is new, isn't it?
I seem to recall that there used to be two
minimum weights, 100kg difference, with the lighter option requiring smaller wheels and fuel tank.
What's the best option for an LM GT, weighing up power against weight?
For example, a 3800cc car can have 40.6mm restrictors at 1100kg, rising to 44.2 at 1300kg