rb20det oil feed size

Discuss the RB20, RB25 and RB26 series engines.
benj09
Posts: 5
Joined: Sat May 13, 2006 5:02 pm
Car: Turbo Cavalier

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Im sorry if this has come up, but I searched and came up with nothing. Im not familiar with Nissan but im using a rb20 turbo on my car. What is the oil feed size on the turbo? I think my car uses a 1/4 npt for the block.. If someone could please let me know what size I need for the turbo and where to buy, that would be great. Thank you.


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rb240det
Posts: 261
Joined: Tue Apr 19, 2005 8:12 am
Car: 1991 240sx Hatchback and 1994 300zx

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I know the oil feed line is either 12mm or 14mm (and I believe the pitch was 1.25 also). I'm actually pulling my RB20 out of my S13, so I can get the exact measurements unless someone posts them first.

benj09
Posts: 5
Joined: Sat May 13, 2006 5:02 pm
Car: Turbo Cavalier

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rb240det wrote:I know the oil feed line is either 12mm or 14mm (and I believe the pitch was 1.25 also). I'm actually pulling my RB20 out of my S13, so I can get the exact measurements unless someone posts them first.
thank you, does anyone else know exactly off the top of their head?

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BoostFab
Posts: 3529
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Car: S13cp, S13fb, S14z
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the oil feed line itself is relatively similar to a AN-4 line, the thread size of the port on the block is 12x1.25 (mm)

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Carl H
Posts: 5985
Joined: Mon Aug 04, 2003 4:09 am
Car: 1995 Nissan 240SX SE RB30DET

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the oil inlet on the turbo is 12x1.24mm as well, not a common fitting size either...

benj09
Posts: 5
Joined: Sat May 13, 2006 5:02 pm
Car: Turbo Cavalier

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Carl H wrote:the oil inlet on the turbo is 12x1.24mm as well, not a common fitting size either...
you mean 12 x 1.25? kinda confused me lol. but yeah, i havn't seen a 12 x 1.25 anywhere online, but iv seen 10 x 1.25 thats about it. dang!

benj09
Posts: 5
Joined: Sat May 13, 2006 5:02 pm
Car: Turbo Cavalier

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actually i just found one at summit, would this work?

http://store.summitracing.com/...w=sku

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Carl H
Posts: 5985
Joined: Mon Aug 04, 2003 4:09 am
Car: 1995 Nissan 240SX SE RB30DET

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yes that fitting will work, but remember to run a gt turbo spec restrictor some where in the line as this is a bb turbo...

benj09
Posts: 5
Joined: Sat May 13, 2006 5:02 pm
Car: Turbo Cavalier

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where can i get one of those?

Shahee1
Posts: 312
Joined: Sun Apr 27, 2003 9:00 pm
Car: 1993 240sx w RB20DET
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I was impatient and tapped my block and fabricated a larger line ... LOL ... don't do anything of the sort ... LOL ...


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