It needs more fuel. With the old turbo it used to soot a bit under power, now because there is a HUGE increase in the volume of air, it now runs very lean, no soot at all ( apart from the off boost puff of soot),
Have to finish making a wastegate actuator braket tomorrow, then put it on the rollers and pour in diesel.
It farkin sounds great, had to modify the exhaust so it stops at the cab.