need to verify turbo line fittings?

Discuss the RB20, RB25 and RB26 series engines.
robbie2883
Posts: 605
Joined: Thu Jun 01, 2006 5:36 am
Car: 1998 RB25 Kouki

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i've been searching and just wanted to verify the sizes needed for the block. thanks for any input

Oil Feed at Block: M12x1.25"Oil Return at Block: 3/4" BSPT (3/4" NPT can work)

Coolant Return at Block: M14x1.5" - this one i'm in question about cause i've seen both 14x1.5 and 16x1.5

also from waht i've seen i just use a hose barb on the end of the coolant feed and put it into the factory feed hose near the tee? OR make my own tee with an AN output?



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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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sounds good to me...and your coolant lines are correct for the block...i believe the turbo has different size banjo bolts.been ages since i've had a stock turbo thru my hands.

robbie2883
Posts: 605
Joined: Thu Jun 01, 2006 5:36 am
Car: 1998 RB25 Kouki

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yeah, i've got the turbo side covered since my 35r is going on.

so it's the 14x1.5 for the coolant line?

gawdzilla
Posts: 2028
Joined: Sat Sep 18, 2004 11:51 am
Car: none

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that looks correct. it's fine to run barbed rubber coolant lines as long as they are away from big heat sources. hell, the upper and lower radiator hoses are barbed lines. just don't run rubber barbed coolant line in/out of your chra unless you can protect the line very well from melting. i prefer AN braided lines to the chra wrapped with flame guard

robbie2883
Posts: 605
Joined: Thu Jun 01, 2006 5:36 am
Car: 1998 RB25 Kouki

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gawdzilla wrote:that looks correct. it's fine to run barbed rubber coolant lines as long as they are away from big heat sources. hell, the upper and lower radiator hoses are barbed lines. just don't run rubber barbed coolant line in/out of your chra unless you can protect the line very well from melting. i prefer AN braided lines to the chra wrapped with flame guard
yeah, i've actually got these billet banjo fittings coming off the turbo into SS -6an line. they're about 3" inches long so they do a good job of seperating the lines from the direct heat of the chra.


gawdzilla
Posts: 2028
Joined: Sat Sep 18, 2004 11:51 am
Car: none

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same thing i've got... good stuff.


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