Oil Restrictors Are They On Factory N1 Engines

[kronic]

Does nissan put in oil restrictors to the turbos on the n1 engines? I have changed from a standard block to an n1 and am using n1 oil pump with 34 n1 turbos. connecting this all with my standard r33 gtr oil lines. All im looking to know is that when a r33 or 34 n1 rolled out of the factory were they fitted with oil restrictors..?

[LTSJayce]

Good question! Can I also add to your question by asking who makes said oil restriction kits if the N1 blocks don't already have one fitted?

[Swiper the Fox]

Good question! Can I also add to your question by asking who makes said oil restriction kits if the N1 blocks don't already have one fitted?

<{POST_SNAPBACK}>

Tomei...contact Ian @ Hi Octane....or in QLD Mark @ Godzilla Motorsport.

Edited January 30, 2006 by DiRTgarage

[kronic]

Does anybody know....?

[Sydneykid]

Does nissan put in oil restrictors to the turbos on the n1 engines? I have changed from a standard block to an n1 and am using n1 oil pump with 34 n1 turbos. connecting this all with my standard r33 gtr oil lines.  All im looking to know is that when a r33 or 34 n1 rolled out of the factory were they fitted with oil restrictors..?

<{POST_SNAPBACK}>

What oil restrictors are you talking about?

The one between the block and the head?

The N1 blocks we have received did not come fitted with oil restrictors, you have to fit them.

Or the restrictor in each tubo oil inlet?

The new R34 N1 ball bearing turbos we have received did not come fitted with oil feed restrictors, you have to fit them. Used ones did.

cheers

[kronic]

Thanks fellas but i really need to know if nissan fitted oil restrictors to the turbos

when the n1's rolled off the factory floor? EG, Is there a part no for oil restrictors on an n1 33 or 34 gtr from nissan.

[Amaru]

Where does one get the oil restrictors to suit the N1's and other Garrett Turbos?

[RB30-POWER]

All BB turbo's require a restrictor of some sort.

Or else the turbo will get to much oil and blow seals etc.

The restrictor is usually in the banjo fitting on the oil lines running to each turbo.

Hope thats what you are asking.

[Sydneykid]

Where does one get the oil restrictors to suit the N1's and other Garrett Turbos?

<{POST_SNAPBACK}>

Any Garrett agent.

cheers

[silman]

All BB turbo's require a restrictor of some sort.

Or else the turbo will get to much oil and blow seals etc.

The restrictor is usually in the banjo fitting on the oil lines running to each turbo.

Hope thats what you are asking.

Just found this post when doing a search on a question that I'm looking for the answer to. It's essential to fit an oil feed restrictor to the turbo, but is the one i have purchased in the link below suitable for my GT30/40R?

http://www.himni-racing.com/index.php?main...products_id=508

(in my setup, i'm using an N1 oil pump on an rb25det)... If this is installed, is it still essential to put a restrictor in one of the two oil feeds on the block, going to the head?

Edited March 29, 2006 by silman

[180bfj20det]

Im pretty sure all BB turbos (genuine ones) from garrett and hks have inbuilt restrictors. Therefore no need for this restrictor for your "mismatched laggy" gt3040r. Disco could confirm this. Let us know how this turbo goes cause apparently, they are laggy

[silman]

Please take the time to read my post carefully and reply only if you have information relating to this question. There's a lot of talk about GTBB turbo's having restrictors inbuilt that's clear from the amount of threads on the board. My post clearly specifies though, that I have an N1 oil pump, and i have this external oil feed restrictor.

Sydneykid or someone with first hand experience, can you please confirm that with all RB engines, is a restrictor on the block still required if a 1.5mm turbo oil feed restrictor for the turbo is in place? (1.5mm in my RB25 application). Does the location of the restrictor make a difference to oil starvation at the sump? Or does the restrictor HAVE to be installed in the block, leadng to the head ONLY? cheers.

Edited March 29, 2006 by silman

[Sydneykid]

Please take the time to read my post carefully and reply only if you have information relating to this question. There's a lot of talk about GTBB turbo's having restrictors inbuilt that's clear from the amount of threads on the board. My post clearly specifies though, that I have an N1 oil pump, and i have this external oil feed restrictor.

Sydneykid or someone with first hand experience, can you please confirm that with all RB engines, is a restrictor on the block still required if a 1.5mm turbo oil feed restrictor for the turbo is in place? (1.5mm in my RB25 application). Does the location of the restrictor make a difference to oil starvation at the sump? Or does the restrictor HAVE to be installed in the block, leadng to the head ONLY? cheers.

You sure are confused…………….let’s see if I can fix that…………….

1. There is no relationship between the restrictor in the block to decrease the oil flow to the head and the restrictor in the turbo oil feed.

2. The turbo oil feed is plumbed into the block BEFORE the head feed oil restrictor. So the size of the head feed oil restrictor has no effect what so ever on the turbo oil feed.

3. The size of the head feed oil restrictor is ONLY dependant on the oil pump used and the RPM that the engine sees. The turbo (plain or ball bearing) has ZERO effect on the size of the head feed oil restrictor.

4. On RB’s, all ball bearing turbos require an oil flow restrictor because the pipework and fittings are designed for plain bearing turbos. Plain bearing turbos require significantly more oil flow than ball bearing turbos.

5. Ball bearing, water cooled turbos require less oil flow than plain bearing oil cooled turbos

6. SOME ball bearing turbos come with oil flow restrictors standard, some DON’T. Some have add in restrictors, separate parts that you can remove. Some have the oil feed drilled to the right size (ie; no external restrictor is required). Look in the oil feed on the turbo core, if the hole is larger than 2 mm there is no restrictor. If the hole is smaller than 2 mm, then that is the restrictor you are looking at.

Hope that helps

cheers

[silman]

thanks for clearing that up. I'll take the head off, and install a 1.5mm restrictor in one of the feeds in the block whilst the engine is out of the car. By the way, here's a picture of my turbo. It looks like it doesn't have the restrictor installed (does this seem to be the case from what you see?), but i'll use the one i bought pictured above at this fitting.

.

and the other side;

Edited March 30, 2006 by silman