hello, back with same problem as my last build... at idle say waiting for a light to change the turbo will drip oil down the exhaust pipe, if it keep idle il cloud an entire intersection, tubo core is the same as last build. could be the problem? turbo has a fresh rebuild by a reputable company, its a garret .60cold with S5 hot. im using a megasquirt so no MAF, i have ran a line from oil filler neck to my intake before the turbo to suck press out of the crack case.
but air takes the path of lease restriction. so there no vacuum there at idle. the last megasquirt build i did, i had to keep the maf installed to create a resistance in the intake at idle. but this restricts the 3" inlet i now have. could my oil press be to high at trubo? could i use a vac line to suck press out of the crack case and use a check valve to stop it from getting pressure under boost?
what do you guys think thanks

could use a needle valve to modulate the amount of vac im drawing

 

Is the oil leaking from the inside of the turbine housing?

If so, then either the pressure at the CHRA is too high (unlikely) or the turbine seal is bad.

If it's a stock CHRA they are internally restricted.

Though, what are your idle AFRs? Excessively rich will tend to draw oil out from everywhere.

 

AFR are a tad rich... il give that a try!! see how lean i can make it run and see if its better thanks

 

Depends what "tad rich" means. At 10s I would expect smoke. At 12s (still a bit rich) I wouldn't.