N1 Oil Pump - Epic Fail

[Marko R1]

That correlates with the "a good harmonic balancer will save your oil pump" theory i've heard stated on here.

this mod should be done on any big rb26 or rb30

[Duncan]

probably a factor....but maybe not the only one in rb blocks.

since they are cast, have a full girdle and the crank is factory forged and nitrided...they are pretty strong compared to many motors despite being a long 6 cylinder. this is supported by the fact they almost never spin main bearings.....

[R31Nismoid]

this is what breaks the oil pump.

a good read on whats happening :crankshaft harmonics

That's what said a while ago... It's going on without a doubt.

They are a I4. Not a longer I6.

Taking a wild stab here but a I4 is not going to have the crank movement a I6 has, especially due to weight and so on.

Nor are the forces/pressures there especially if hitting limiters and so on with all that extra spinning around.

And it was met with...

Torsional vibration and harmonics are generaly worse in an I4 due to firing order and cyl sequence, also one of the reasons most I4's have ballance shafts to try help NVH

Large crank movement = toasted bearings, SR20's run main bearings pretty easy if not 100% dead on ballance when running over 400wkw yet dont break oil pumps running a near identical drive setup & dimensions to the RB... Rb on the other hand comes out with bearings looking like brand new yet oil pump is scrap metal, The RB pump is driven not even 3-4mm from No:1 main bearing, pump gets damaged from movement but bearing isnt touched?

There is no way to have rotational vibration / whip without it running out of center.

Yes Rezlo an inline 6 is dynamically balanced, so no issue there.

Time to revisit?

[T04GTR]

That correlates with the "a good harmonic balancer will save your oil pump" theory i've heard stated on here.

every time theres an oil pump thread i cut and paste this page from ati.. sums it all up. stock balancers wont be suficiant to keep a "stock" oil pump alive, not evan a trust or jun either.

on another note, our race supra (2jz) has a alloy crank pully with zero dampening, looks like a water pump pully.. its not blown the oil pump either. and it hits the limmiter pretty hard. just goes to show how superier the toyota oil pump drive system is..

ive tried to make them put a good balancer on, but with no sucess lol.

[GT-RZ]

Think we're going around in circles here? All engine cranks have harmonics to deal with. Engineers know this and deign components connected to such stresses in mind. Nissan oil pump design was a fail, period.

[GT-RZ]

Whats happeneing with the gears? can't seem to find the group buy- probably blind i'll have another look.

[bubba]

I went looking yesterday and couldn't find it..

[R31Nismoid]

Group buy was removed @ the request of the creator.

"Well considering theres a few guys not real confident and wanting to see some testing results, this group buy can be closed for the mean time."

Fair enough too IMO. A G/B that should have started once there was some actual testing for sanity's sake at least.

[shanef]

Whats happeneing with the gears? can't seem to find the group buy- probably blind i'll have another look.

Yes they are still being made. I closed the GB thread to follow the forum rules . I'll put up another one when i have some 'testing results'

[GT-RZ]

ah nice work! I'll be in 100% if they come out like planned.

[RB30 Ceffy]

X2

[JD74]

Anyone have any pics of the inside of the NITTO Pumps ? - I would really like to see what makes it special, other than what is said about it.

I am a little interested now and like many others, I was simply scared into facing the fact that I would have to eventually buy a Tomei Pump for my ongoing build, but if there is an alternative, I am open to reveiwing it.

Thanks,

Allan

[Swiper the Fox]

Anyone have any pics of the inside of the NITTO Pumps ? - I would really like to see what makes it special, other than what is said about it.

I am a little interested now and like many others, I was simply scared into facing the fact that I would have to eventually buy a Tomei Pump for my ongoing build, but if there is an alternative, I am open to reveiwing it.

Thanks,

Allan

i can send you a photo of the nitto pump that ate cast iron if you like...your e-mail address?

[JD74]

[email protected]

Thanks.

Although THIS does interest me, I am still waiting patiently for the AUS 'Tomei' replacement

So to whoever is doing it.....Get on that CNC and make some magic.....lol

Edited September 22, 2009 by JD74

[Swiper the Fox]

[email protected]

Thanks.

Although THIS does interest me, I am still waiting patiently for the AUS 'Tomei' replacement

So to whoever is doing it.....Get on that CNC and make some magic.....lol

JPC in Melbourne already produce N1 style replacement OEM pump gears if that is what interests you. http://www.jpc.com.au/ The Nitto pump gears are made from superior material from those though...i would rather not risk it with any material other than Nitto or an external pump.

Edited September 22, 2009 by DiRTgarage

[Marko R1]

sens me those pics as well paul - u have my email address

[Beer Baron]

just post em up.

[R32 Driver]

I was on Nissansilvia forums earlier and came across the powertune gears (again)

http://hardtuned.net/forums/index.php?app=...ttach_id=177301

made out of P20

hows it compare to JPCs 4340 gears? pretty cheap at $350

[JD74]

I am still at a bit of a loss when it comes to these 'Nitto' pumps.....

Where are they made ?

Who makes them ?

Who is Nitto ?

Info is in short supply. Website ? Manufacturer Info ?

Unfortunately these are not a great deal compared to Tomei anywhere else other than Aus/NZ......

Edited September 24, 2009 by JD74

[wrxkilla]

But you can break any oil pump...

Exactly! Go Dry Sump for Saftey!

here's my oil pump...