Oil pump: Spline gear Vs. Reimax Vs. high-pressure oil pump ?

[Bruizer]

LOL oh she does a good job keeping me on a leash, but its difficult for her to do when im spending my own money lol. If only I hadnt promised to financially contribute to this wedding lol.

Depending if it's a marriage or just a legal document (with a ring that doesn't plug holes) for when you divorce, that will be the difference between you separate money or money as a whole together

Anyway I've been there, that's why I say that. Can only be selfish so long. I remember buying myself $5k brakes for Christmas and her a $600 laptop. Boy was she pissed.

[Skym]

It's not just high rpm that starves the bearings. High G cornering/ many corners (which a sump baffle doesn't solve), high cylinder pressure/boost (have seen a few local examples running N1 oil pump and at 1.5bar on -5/ nismo 581/ big twins if someone cares for which) and the rod bearings got crushed (running stock bearing clearances).

Builders found that the N1 oil pump didn't have enough pressure to oppose the cylinder pressure but a Nitto, greddy or tomei pump would have saved the engine.

Nothing to really worry about if you're using it as a street driven daily car but beefing up a stock pump would solve all oiling problems.

That's true, stock oil pump doesn't have enough oil pressure at higher rpm (ok for low rpm use), hence the N1 oil pump with shimmed relief spring (old trick) was created to get higher oil pressure. But it's only good to a set rpm (stock rev limiter) and with stock cast pistons with tight clearances, etc.

From what I understand, Tomei, etc oil pumps are designed for a forged engine where the clearances are wider on pistons, etc, thus need more volume of oil and higher oil pressure for higher than stock rpm. That's why the Tomei oil pump is adjustable with oil pressure, as can be used at any rpm it's set to above stock rev limter (when aiming for more hp, higher boost levels, etc). But have to increase sump capacity to suit the oil pump moving more oil, as the stock sump is designed to suit the stock oil pump.

Nismo oil pump is the same (more volume, pressure, etc) as the Tomei oil pump and the Nismo oil pump was used on the forged Group-A RB26 engines. But the Nismo oil pump didn't have adjustable oil pressure, as they set the rpm at a set rpm for those engines.

Basically each oil pump has an application it suits and usually suits the engine internals from the same manufacturer. HKS engine internals, HKS oil pump, etc.

There's is a list on the net somewhere of the rpm the different brand oil pumps are rated to (oil pressure part).

With that being said, even with the longer pump snout on the cranks, there's been reports of greddy and tomei pump failures still.

From what I have seen in photo's, heard, usually fail when they bounce of the revlimiter on a misshift. Driver error.

[silvianc]

Oil pump: Spline gear Vs. Reimax Vs. high-pressure oil pump ?

Read most of the thread. I went with n1 pump and raw brokerage crank collar/spool billet gears on my built rb26. Have spool head oil drain, tomei 1.5 restrict or and 10qts oil sump. Pushin 600 up on 19 psi and precision 6262. No problems here so far. And rpm limiter is 9k.


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[silvianc]

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[r32_nate]

ill probably set my limiter around 8k or 8.5k, depending on what is suggested by my tuner.

[cobrAA]

still following this thread with great interest. as of now. nothing is changing because we havent opened the motor yet! I've been pushing my motor with forged motor and a pair of gt2860 with a n1 pump with no problem at a set rev limiter of 7.8k rpm.

This time, I went with a stock pump with reimax gear ( because the gear is 4mm thicker) and I asked my mechanic to do the shim trick to boost a bit the pressure. My only grip is that i'm running an external oil cooler so hopefully the stock pump can have enough pressure to overcome the extra path the oil has to travel ( with my N1 pump, it wasnt a problem)

But to each his own, but I believe the ego of some people are simply too big.. in most case, the powerband start falling at 7k.. so theres no need for 8.5 - 9k rev limiter , except to brag about it to your friends...

[r32_nate]

Christmas came today, my spline drive gears arrived Ill get them installed on Friday when I go to get my pistons, rods, and clutch discs.

[Bruizer]

I have a built engine so why no push 9.5k. Everything is rated to that including my little turbos but I don't plan of bouncing off the limiter.

Wonder how this spline mod would work on a Tomei pump.

[Black BNR32]

still following this thread with great interest. as of now. nothing is changing because we havent opened the motor yet! I've been pushing my motor with forged motor and a pair of gt2860 with a n1 pump with no problem at a set rev limiter of 7.8k rpm.

This time, I went with a stock pump with reimax gear ( because the gear is 4mm thicker) and I asked my mechanic to do the shim trick to boost a bit the pressure. My only grip is that i'm running an external oil cooler so hopefully the stock pump can have enough pressure to overcome the extra path the oil has to travel ( with my N1 pump, it wasnt a problem)

But to each his own, but I believe the ego of some people are simply too big.. in most case, the powerband start falling at 7k.. so theres no need for 8.5 - 9k rev limiter , except to brag about it to your friends...

yes, there is a need. some people actually race their cars, and don't have little baby cams and turbos.

[bobbo]

yes, there is a need. some people actually race their cars, and don't have little baby cams and turbos.

I do as much track time as possible both at my home track and I travel all across Canada and the US to tracks. I still have a stock pump (but changing it this winter). My motor is in very good health at almost 160,000 kms making 427whp at 16.5lbs.
Is the car run hard? I hold one of the fastest lap times at my local track for a street car.
So your comment about baby cams and turbos... makes you sound "offensive" to be polite.

[cobrAA]

I do as much track time as possible both at my home track and I travel all across Canada and the US to tracks. I still have a stock pump (but changing it this winter). My motor is in very good health at almost 160,000 kms making 427whp at 16.5lbs.
Is the car run hard? I hold one of the fastest lap times at my local track for a street car.
So your comment about baby cams and turbos... makes you sound "offensive" to be polite.

like i said.. some have ego-problem Remember I used the term, '' in my opinion'' , ''some ( meaning i didnt want to put everyone in the same basket)'' and '' in most case''

[bobbo]

Alex your car was exceptional before. I can only imagine what it'll be like once it's back together.
It might just need a coat of wax
I still think the oil pump topic is out of control.

[Bruizer]

Exceptional gtr is my mission

Small turbos, biggest cams here.

[cobrAA]

Alex your car was exceptional before. I can only imagine what it'll be like once it's back together.
It might just need a coat of wax
I still think the oil pump topic is out of control.

Sure thing !! I will contact Justin this year again since I didn't come last year.My plan is to visit robin at latest may 1st, will let you know the final outcome

[leung23c]

What is your engine spec Bruizer?