Gettin back into the miata project game and the turbo lines are pretty much situated and wondering what size oil feed inlet people use. Right now the regular -4 an fitting is 5/64ths (.1406) and for a BB turbo its too much. I the smallest drill bit i have is 1/16th (.0625). What should i use?

 

I use a -3AN with an .035 restrictor.

 

Is .0625 too big?

 

No idea. I think ATP sells something in the .060 range as well, not 100% sure. It's probably fine provided you don't have some crazy 70+psi shimmed oil pump.

 

Stock oil pump. Thanks sav

 

what are a few good websites/companies to buy restrictor orifices from for the oil feed lines?

 

too big. I have a .035 with #4 lines. It works and no more smoke at cold-start and now more oil through the BOV.

 

http://atpturbo.com/