oil restrictor?
 

i have a 60/63 t3 on my z6 and after hard boost run i get a little blue smoke. normal driving and even getting on it into traffic isnt an issue, only after a hard pull. i was thinking of putting an oil restrictor in. i dont want some big valve being an eyesore so i am going to tap my oil fitting, put a set screw in and drill a whole in that. does anyone know what size hole to drill. everything i have read says .065". i just want to make sure before i ruin this turbo. a rebuild is in the works, but im not ready yet

Re: oil restrictor?
 

ive used 1/16 before worked good for me

good luck

Re: oil restrictor?
 

1/16 inch is good.

Ive had pretty good luck with taking the fitting that goes into the turbo, putting a screw in one end (to block it off temp) and filling the fitting with solder, then removing the screw and drillng 1/16 thru the solder. Instant restrictor. :6

Re: oil restrictor?
 

mcmaster.com ....

Part # 2712T44
Brass Flow-Control Orifice with Pipe Thread 1/8" Male X Female

Maximum Pressure: Brass: 2000 psi @ 200° F; Stainless Steel: 4000 psi @ 200° F
Temperature Range: 35° to 200° F
These orifices have NPT connections for inline mounting. Connections: See table.
Please specify orifice diameter: 0.016", 0.018", 0.020", 0.021", 0.023", 0.024", 0.025", 0.026", 0.028", 0.029", 0.032", 0.033", 0.035", 0.038", 0.040", 0.042", 0.047", 0.052", 0.055", or 0.063".


$7.43

Re: oil restrictor?
 

-3 or -4 earls or hitcjhikkrs method just as good. or you can run you one inline before or at the turbo. figure out what thread it is (probably -4) and buy the fitting tap it at the turbo.

Re: oil restrictor?
 

yea just use the 1/16 that what i used and its a .062

Re: oil restrictor?
 

I have the exact same turbo and I used a 1/16" orifice. I took an 1/8" to -4an adapter and tapped it like you were saying, drilled the hole in the set screw and screwed it in. I also used threadlocker to make sure it doesn't back out.

Re: oil restrictor?
 

ohhh i just brazed my #3 fitting on the turbo feed shut then drilled it out cost me 0

Re: oil restrictor?
 

i have a tap and die set and plenty of screws. i can do my method for free too.


i am mostly worried about the size of the whole to drill. i dont want to startve my turbo of oil and i dont want the restrictor to be pointless

Re: oil restrictor?
 

well on my z6 the .062 (1/16) on my turbo seems to be perfect i've been using it for a while now and it dont smoke at all. so i think i got it just right. pluss when i was searching around about it that was the most common size .060-.065 so i did a .062 and its perfect