How much to drill out oil feed restrictor?

[LookDadNoBdyKit]

I am using a -4AN SS feed line and am having problems with oil blowing past exhaust seal, so I got an SBR restrictor to try out. This restrictor is meant for Ball Bearing GT series turbos.

I am running a PTE SCM 50.

The restrictor is clearly too small for a standard bearing turbo, so Im wondering what it should be drilled out to? Some people say .078 and others say .080. Will it make any difference? What should I drill the restrictor out to?

 

[DSM90AWD]

As an FYI.. PTE recently started recommending -3AN feed lines available at many of the PTE vendors.

As for the restrictor.. I had one that was .078 and seemed to work.
http://www.dsmtuners.com/forums/showpost.php?p=1422252&postcount=15

 

[Defiant]

Is 2/100ths really going to matter?

 

[logic]

Forced Performance has some things to say on the subject of restrictor sizing, depending on where you're sourcing the oil feed from.

 

[LookDadNoBdyKit]

Ended up drilling to .078. I will let you guys know if my smoking turbo issues go away after this.

 

[92awddsm]

Is 2/100ths really going to matter?

It is 2 thousandths, 2/1000. If it was 2/100ths, that would be .078" to .098".

 

[Defiant]

It is 2 thousandths, 2/1000. If it was 2/100ths, that would be .078" to .098".

Yeah.

Is 2 thousandths going to matter?

 

[Burnett03]

Ended up drilling to .078. I will let you guys know if my smoking turbo issues go away after this.

if not i have a setup that uses nitrous jets if you want it.