Just had new saph serviced with new oil filter etc etc. new plugs (the right ones)

Compression test done showing between 150-160 on all cylinders.

Boost raised to 20psi from 15psi and a new chip.

car has new looking t34 with no play in shaft atall. rs 500 cooler and greens.

Now it dont smoke on tick over atall. And if driving normally it does not smoke.

however as soon as i bring it onto boost above 10 psi i get clouds of bluey blackey smoke until its hot then it seems to calm down but i just dont know anymore.

It had some real shitty oil in it before and we all thought it might just be sitting in exhaust but ive drove it for a while now and its still doing it.

The one thing i can think of is its not got an uprated breather system, could this be it.

Is there anything i can try before i spend £150 on a better breather.

Any help would be great, everyones saying just drive it its fine but i dont like it the way it is and i could never put up with it.

Cheers

Rob