Nevermind I think I'm going through 7 too fast and having to brake for 8.
Yes if you go too fast through 7 then run wide your compromising 8. You can actually go quite wide still use the full track on exit of 7 then keep the car moving a little to the right before 8 where you should be able to run flat through this corner even from the middle of the track. Take a bit of the left apex curb and then running out onto the exit curb outside but staying on the track. If you go off the track at exit of 7 you will then either have to lift significantly to make 8 or end up wide at 8, in the grass maybe even the wall. Your tyres also get dirty when off track so this will effect braking into t10 which is a critical corner for lap time as its followed by the fastest section of track.
Most of the corners here are faily long so you cant go full throttle too early, aim for the apexes then wait for the moment you can go full throttle. You dont want to have to lift late into the exit because your either running wide with understeer in the gtr or loose on throttle in the rwd cars.