I have just had to drop my CR from 9.1:1 down to 7.9:1 due to headgasket supply and deeper valve pockets in the pistons.

So driving it feels slow! gone has the super quick response, and it now doesnt pull smoothly, there are steps in the power band, and it doesnt wheelspin in 6th anymore.

However it is still on its high CR ignition map! will be remapping which will remove the steps.

Boost has fell by 1psi and EGT has fell 50 deg C.

No other changes to the car.

Simon.