Thanks alot you guys also helped me out.....just had my new rebuild installed and im getting that same blackish blue smoke....but only under boost. i have a GT6152 and yes it had some in and out play but not much. didnt know it only takes alittle bit. was gonna buy bigger turbo anyway....just didnt know it was going to be this soon 
Need a solid 10sec turbo....i was thinking turbonetics what brand and model does anyone suggest
Need a solid 10sec turbo....i was thinking turbonetics what brand and model does anyone suggest