Turbo engine had oil squirters, and a noticeably less material on top of pistin to reduce comp (same chamber volume)
If you used stock na pistons and a non neo head you would have aprox 8.3to1 which is low. Sure you have added capacity bit the drop in comp comes at a price.
As kiwi said check cam timing, what gaiety thickness did you use?
The thinner the better in the car of non neo head stick piston build.