No, I don't need to know what size restrictor to run. What I would like to know, however, is if there any repercussions to running an oil restrictor at the begging of the oil feed line rather than directly before the turbo. I would imagine that there would be but I would like a definite answer. Thanks.

One thing that comes to mind, is at start up it would take a while to fill the line and make it to the turbo. Therefore the turbo wouldn't get oil for the first few minutes possibly.

Biggie is correct. If you have it before the line you're restricting flow to the line, not just the turbo. It needs to be as close to the turbo as possible, preferably after any bend you may have at the turbo.

You should either thread it directly into the turbo or have a little threaded flange that bolts to the turbo that the restrictor will thread into but both these guys are right. For journal bearing you need a .064" restrictor and for ball bearing you need a .032" restrictor

Cool sounds good. I'm running an oil restrictor at the turbo but I've always been curious to know if it could go to the front of the feed line.

I ran a .064 off my oil filter sandwitch sr t25 no problems for 4,000 miles. Never really though about it like you guys put it. Im gonna say you guys are spot on.

I will say this tho i put a cyl. head on one time and it was not seated all the way. Kinda hung up on the dowels i guess. Anyways i cranked that dude up and 5 quarts came out faster than i could blink! That was a rebuilt engine that i cleaned all out so it was "dry" 1st start up!