Rb25Det Oil Pumps And Oil Restrictors

[mickr33couple]

Thanks boys, yeah have done alot of reading an looking around, as it was a fully built motor and with 2000ks the old owner spun bearings broke 5 oil jets off... Haha so I don't wanna cross that path

I think the engine builder thinks I'm using a standard pump when I am using a n1 so I'm sure when I tell. Him he will say to put restrictors in

[GTSBoy]

An N1 is hardly a high volume pump. Just a little bigger than stock. It IS the stock pump in a 25Neo.

[Miguelone]

An N1 is hardly a high volume pump. Just a little bigger than stock. It IS the stock pump in a 25Neo.

The gears are actually smaller than the stock pump, it flow oil at higher pressure, not more of it.

It's not the stock pump for a NEO either, part numbers between Neo and R33 RB25DET's are exactly the same(15010-5L800) Whereas the N1 pump is (15010-24U01).

Source: Nissan Fast

[MJTru]

he is right i have same part numbers mate. ?

[JustinP]

The gears are actually smaller than the stock pump, it flow oil at higher pressure, not more of it.

It's not the stock pump for a NEO either, part numbers between Neo and R33 RB25DET's are exactly the same(15010-5L800) Whereas the N1 pump is (15010-24U01).

Source: Nissan Fast

FAST is wrong on this one. Both of the standard Neo's I have have seen dismantled (including my own) have had an N1 oil pump. And several others membes of this forum have seen this also. There is the possibility that some did not have the N1 but it seems unlikely. Mine was a very early build Neo.

[Miguelone]

Interesting, is it possible at all that they may have done a recall and replaced them with N1 pumps?

[kitto]

Yep. Wrong. All NEO 25DETs have N1 pumps from the factory. Still short nose crank though.

They have a higher oil pressure relief spring. Its a debate as to whether they flow more or not. N1 has a different tooth design though. It is 'waved' and not symmetrical.

[Simon-S14]

Btw pressure and flow are two different things..

[Miguelone]

http://webbersrbguid...nical&Itemid=22

Edit: Actually that doesn't seem like a very reliable source.

[abr33]

Btw pressure and flow are two different things..

And it gets a little complex when talking hydraulics too

Edited November 7, 2012 by abr33

[mickr33couple]

Another question guys, looking at running some conrods, between nitto and spool anyone had anything to do with these?

[mickr33couple]

I'm going the nitto oil pump, pissed the n1 pump off,

Now the question is what oil restrictors for the nitto pump?

I'm getting a larger sump as well

Does 2x 1.2mm sound right ???

[Simon-S14]

block the rear and run 1x1.3

[mickr33couple]

I thought it was leave the front block the middle and 1.5mm rear???

Could I go 1.3 middle 1.3 rear?

I don't want lifter noise

[Simon-S14]

its always block the rear.

if vct then leave the front, 1.5 or 1.3 middle (depending on use and rpm range plus pump ) then block rear

[mickr33couple]

It be street driven daily, (cruising) so low rpm only when I wanna get it a boot full here and there

Will see 1/4mile here and there

It's a nitto oil pump and larger sump

[mickr33couple]

This table says to block middle?

[Rb25/240]

On my rb25 s1 I left the front vct, 1.5 middle and blocked the rear just got it started last week and only ran it for about 10 mins and still have lifter noise. How long does it usually take for the lifters to pump up