Oil feed line question

[Bigzavs]

i was just wondering is a -4an line too much flow for a feed line? i was told its better to use a -4 but i was just checkin with you guys to see what u think
thanks

 

[itr206]

I personally use -3. With a -4 Id prob use a restrictor

 

[MK3Brent]

-3an.

 

[BlackDevilSupra]

If your operating oil pressure is decent, ~40psi or greater, or if you're using a ball bearing turbo, then go with the -3 line, if not, then go with a -4 line (the stock turbo oil feed line is somewhat equivalent to the ID of a -4 line). And for god sakes, if you're using a journal bearing turbo, don't ever put a restrictor on the oil feed line.

 

[itr206]

And for god sakes, if you're using a journal bearing turbo, don't ever put a restrictor on the oil feed line.

tell that to the people that kill their seals from too much oil pressure.

 

[BlackDevilSupra]

Don't exerpt my response without including the full text.
NOTE my first sentence w/r to substantial oil pressure.
Thank you.

tell that to the people that kill their seals from too much oil pressure.

 

[aljordan]

I've been running -4 with no restrictor on my ball bearing TS04 for about 5 years now. A bit over 60k miles. Maybe there is a restrictor built into the CHRA, but I just threaded the fitting in.

 

[sethron71]

I am running a 6AN feed, and 10AN dump.

Seth

 

[MK3Brent]

I am running a 6AN feed,

Seth

:aigo:

 

[tsuper92]

where the hell can you find -3 an fittings and lines.its hard enought to find -4 an,like the 12mm x 1.25 for the block.

 

[IJ.]

Early GTr's didn't have a restrictor so were prone to flooding later ones have a 1mm/0.040" restriction.