So out of interest I got the car weighed yesterday. 1480KG (+-10kg) with the fuel light on and without me in it.
So with a bit of fuel and me weighing 130kg the car weighs around 1630KG. (approx 3600lbs)
My GC8 weighed 1231 without me and that managed 10.90 with 430whp.
My real target is to beat that with a 10.89 or quicker which I haven't done yet. There will be more visits to the strip until that's achieved.
Given the 10.97 i did its easily doable I just have to get my shit together and drive it better.