Ok I got my car going again after a minor head gasket replacement, but prior my car was smoking not alot but here and there. Keep in mind it was running pig rich prior to dyno as well. anyways i a mrunning a B20 vtec turbo motor presicion turbo 500whp, if i idle for a period of time then drive off it will smoke for just a bit and go away while crusing. now while just driving there is not smoke the times i see it is if i deccelerate on the highway and let the car slow down and tap the throttle i see alot of smoke. i also see smoke under boost but just for a bit as well any ideas im not sure if im just burning all the crap in the exhaust from running rich for so long. Leak down test show great across the board and compression as well.

 

yup. sounds exactly like valve seals to me

The high vacuum at idle and during deceleration is pulling oil down through the bad seals.

 

But even as your starting to go under boost? i think this is what it is but i thought i was get some opinions. thanks