Custom Turbo Feed Lines

[mdb4879]

For my new setup my turbo cartridge is in a fairly different location from stock. I'm going to be running a redtop SR T25. I've got the actually lines figured out. I just need some solid info on the fittings to use. I've looked in different places and here's what I've come up with, but it's uncertain so I would appreciate confirmation:

M14 x 1.5 to -6AN male (I need 3, 2 for the turbo and one for the block)
M12 x 1.5 to -3AN male or -4AN male (oil feed into the block, not sure if I need a 1.0 or 1.5 thread pitch but I'm pretty sure it's 1.5)
7/16-24 to -3AN or -4AN male with 0.063" restrictor (oil feed into the turbo, confirmation on thread pitch?)

For the oil feed I'm not sure whether to go with -3AN or -4AN. -3AN fittings and lines seem hard to find, so -4AN seems the way to go. Only problem is I can't find an restrictor fitting for the turbo that's -4AN with a 0.063" restrictor. All the ones with that size orifice are -3AN and the ones that are -4AN are made for ball bearing turbos, so the orifice is too small. I found one -4AN with a 0.063" orifice, but the hole is threaded to install smaller jets for BB turbos and the fitting is really long because of this. The only other option I see is to get a -4AN with 0.032" orifice and have my machinist friend drill it to the proper size. I'd rather not do this, but he's confident it isn't difficult for him to do.

So what do y'all think about the restrictor fitting? And are all the my thread sizes/pitches correct?

One more thing, what to I do for the water line that goes under the intake where it currently has a rubber hose to the hard line? should a just put a barbed fitting into it with a -6AN fitting on the other end or is there some better way to mate a braided stainless line to it?

[float_6969]

Don't worry about drilling out the orifice size. I've been making my own oil restrictors for years.

My SS line came with a banjo on one end, and a hose clamp type end on the other end. It ran all the way to the back of the intake manifold and connected to the stock spot.

It looks like this, only with a banjo on one end;

[mdb4879]

Ok, I reckon I'll drill out an oil restrictor. 7/16-24 is the proper thread, correct? I would assume so since that's what all the fittings come in. I'm just making sure because 7/16-20 is a much more common thread for other applications.

How exactly do the Magna-clamp fittings work? How far into the fitting does the stainless hose go? Does the hose slide over the the stock water port under the intake or what? Will it work with PTFE Stainless hose (I'm pretty sure that stuff is pretty stiff so idk how much it'll expand over the "barb" on the water port)? It looks just like the fitting on DIF lines, so I can only assume it'll work. Spectre's site say the 5/16" fitting works with 6AN hose so I guess that's what I need to go with? (Even though 6AN is about 3/8" hose)

[Liquid_Neon]

Im feeding my BB t28 with -4AN lines and fittings. I have a 24" hose with a straight and a 90degree fitting. My turbo fitting has a built in BB restrictor and the block adapter is easily sourced too. It works great!

My coolant lines are new nissan oem banjos (with brand new coppers) and short flared pipes connected with generic heater hoses to the block and throttle body. Finally my oil return is PCV hose with hose clamps, factory dump bung, the stock oil pan bung.

[mdb4879]

Ok, so here's the route I went with:

Adapters:
M14 x 1.5 to -6AN male x2 (One for the block and one for the turbo nearest the block.)
M12 x 1.0 to -4AN male (Oil feed into the block. It's a 1.0 thread pitch, not 1.5. 1.0 is the finer of the two)
7/16-24 to -4AN male with 0.032" restrictor drilled to 0.0625" (Oil feed into the turbo.)

Line Fittings:
-6AN 90 degree on the block and a banjo fitting on the turbo near the radiator (Coolant Line 1. I was going to use a 90 degree fitting on the turbo but the fittings and adapters stick out so far they'd be into the radiator. So I took and SR coolant hard line, whacked it off, and shoved it into the stainless line. Add a hose clamp and it'll be done.)
-6AN 45 degree on the turbo near block, other end hose clamped to the coolant pipe (Coolant Line 2. I scrapped the idea on the Magna-Clamp. I realized the best way was to just hose clamp it straight on due to space constraints. I may put a barb into the line and have that go into a rubber hose, then to the coolant pipe because of how mine is set up. I'll let you know.)
-4AN straight on the block and -4AN 90 degree on the turbo (Oil Feed Line)

I wish I had realized the 90 degree oil fitting in the block had a restrictor in it before hand. That would've taken away a lot of headache, lol. Well, here's the lines I made. The top one still needs to be cut to length once I install the coolant pipe under the intake. Sorry guys, no pics of them on the motor. How the motor looks is a surprise for the end