first the OEM 90 degree elbow going into the butterfly. They split and leak very quickly. Must be a pressure ridge inside or 25 year old rubberized plastic. But a silicon elbow, or do like I did and buy a 90 degree rad hose and cut it to fit. 40k kms and still working. The OEM one caught me on the highway and I had to drive 100kms listening to it dumping massive amount of air.
secondly, the little hoses from the butterfly to the IP pump will blow off at 12 psi. Make sure they are clamped down and in good condition. The engine will rev to 2500 ish on it's own if one comes off.
VERY NICE build you have.
Smoke is not easy to get or see with the turbo.
Now remember to idle it down to 350 or lower before shutting it off to save the bearings and oil in the turbo.