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no pal that is not how you prime a turbo so i am sure you just blew the seal by priming a turbo. you have to have it off the car for one feed oil into it then use an air chuck ect to spin the turbines which in turn gets your bearings pumping with oil!!! so what you did was prime the motor pal by taking out the mpi relay yeah thats all good it pushes oil through everything inculding the turbo but only part of them cause i guarentee you werent out there spining it the turbine with the air chuck!!!!!! or with your fingers at that.
This makes no sense whatsoever.
I've never heard of this and I've been building turbo cars since I was 16. Besides, I can only begin to imagine what a GT4202 would do the ringlands in a stock block at anything over 10 lbs. Also it'd be useless on a stock valvetrain and stock ECU. I know you're running DSMLink but you'd have to rev over 8000 rpm in order to reach it's efficiency level. I'm not bashing you in any way but all I'm saying is that without aftermarket springs and cams there'd be no point in running that turbo in the first place. I'd be interested to see how much lag that turbo would have on a stock valvetrain.
If you want my opinion I'd say to put the turbo up for a while and find yourself a 16g or 20g and run it until you can afford to build your motor to suit that turbo's needs. It LOVES big boost and high rpm and you just can't do that with a stock motor. Honestly I liked your NT build better anyway. I have a semi built 4g63 and was planning to run my 60-1 but I like my big 16g better because I can build full boost before 4000 rpm and I don't have to have 1600cc injectors and DSMLink to run it. Hell my Walbro 190 is more than enough to get the job done efficiently and still be able to provide enough fuel to run my 16g to 20 psi with the right injectors.
For real dude I really don't think Andrew would have sold you a junk turbo so you really should stop pointing the finger at him. I know it's easy to blame the seller but I trust his word and if he said it was fine, it was fine. Just rebuild the turbo and make it a shelf queen until you can get your motor a little more suited for running a turbo that large.
Sorry if this seems like a lecture but I'm trying to help you get pointed in the right direction. You seem like a knowledgeable enough person but you're like me..no patience...