d3mis3d

Just installed a new Stigan k03 turbo on my 2011 A5 and while under boost im getting a lot of smoke out of the exhaust any advice on what could be causing this. Their are no codes i have flush out the exhaust from the failed turbo witch dumbed a few quarts down the exhaust. Also installed new intercool and catch can after new turbo install i have good compression no oil on spark plugs no play in new turbo shaft