F/S RB26 crank collars. Fits N1 oil pump ect. Proper Clearance!!!

[jdms13rhd]

FOR SALE RB26 Crank Collars. Fits all rb engines.

-Made from 4140 High Tensile Steel
-.001 Inch clearance each side
-.002 inch crush ID
-Full Drive
-Fits OEM, N1, pumps perfectly!

I get my machinist to use a 8/32 inch set screw on one side to have the insurance of any slippage, tho with a .002 inch crush you shouldn't be slipping unless there is resistance in the rotation of your oil pump. With that being said, you really dont need to do anything but its your call. The approx cost to install the collar is $40 and another $40 for the set screw FYI. ANY machinist can do this. Its a simple job!

Asking $200ea Shipped anywhere in Canada. Ask for pick up price.

Info:
I have been messing around with rb's since 2005. The single biggest problem with these engines are the oil drive issue and failure of oil pump. The problem with OEM cranks and Jun collars is that the clearance is .006 inch each side with a total of .012 inch. This means that if you are running a R33 crank or a Jun collar that you DID NOT fix this problem. The only thing that has been fixed is the width of the flat tho rendered useless in my opinion with the clearance issue. If you ever take apart an rb engine whether it has R32/R33 crank, jun collar ect you will see that the contact patch between the oil drive on the crank and the oil pump itself only has an approx 3/16 of an inch contact. With that excessive clearance your crank will be slamming the oil pump causing cracking on the inner gear of your oil pump. That is why everyone will tell you that rev limiter on a rb is bad..... Because the crank literally is slamming inside the oil pump. With my collars, I designed them to have proper clearance so there is no slamming AT ALL! The oil pump still slips over the crank easy but with a proper clearance. If you don't understand this problem you shouldn't be building an engine. Its so simple yet nobody fixes this problem. I get frustrated when people buy the jun collars as they are trash!!!! .012 total clearance in unacceptable!!! It may be that the jun collar fits the Jun pump but I have never had one to measure to see the clearance on those two items. So BEWARE!!! Always measure your collar to pump clearance when building an engine!

My asking price is fair. If you want a proper built engine, buy the proper built oil pump collar. Its a $200 cost for a $5000 engine build. Do you really want to risk it??? I didn't think so

Located in Lethbridge, Ab.








Now, here is pictures of proof that the collar to pump clearance is too excessive.

R32 crank:


R32 OEM pump using an R32 OEM crank:


R33+ crank using an OEM pump. Jun collars are the same deal as this!:


Uploaded with ImageShack.us

[Brando13]

Interested, but need to see some hard evidence of them being the actual final permanent fix for the oil issue, cause dont you also need the smaller tomei oil block off or whatever its called in the head of your motor? im still learning skylines so please dont flame me too hard

[jdms13rhd]

Interested, but need to see some hard evidence of them being the actual final permanent fix for the oil issue, cause dont you also need the smaller tomei oil block off or whatever its called in the head of your motor? im still learning skylines so please dont flame me too hard

there is no one "permanent fix" to this problem. There is also a design problem, but for most people building engines, this is what "Should" be done.

As for the Tomei oil block off you are talking about, that has nothing to do with the oil pump clearance issue im dealing with in this thread.
To give a little more insight on the block off or "restrictor" is that once you run with a higher volume oil pump you should restrict the factory oil feed to the head to compensate. When you buy a Tomei head gasket you get a little restrictor to punch inside the block. I cant remember the std size but from memory its approx 1.8mm. I think the one you get with the Tomei head gasket is a 1.6mm. But, depending on if its a street car or you drag race or circuit race depends on what restrictor you should run. I run an even smaller restrictor for my race engines. Its the simplest little thing too. Like 1/4insh round bar with a hole drilled in it. You can get your machinist to make this for you when they install this collar. If you call me and let me know what you are doing I can recommend to you what i would use. Tho, with some research you can find out yourself.

Here is a popular link to that subject:

http://www.skylinesaustralia.com/forums/Oil-Control-Rb-s-Circui-t110680.html&st=20

[Brando13]

So if I want to actually be able to shift after 5 grand without worry on my stock 26 what would you recommend?

[jdms13rhd]

on a side note. i am setting up packages for rb builds. Im looking to include the following to help builders to buy one package rather then hunting down a bunch of pieces for a job.

-RB Oil collars for std/N1 pumps.
-Cyl head restrictors. Whatever size you need. I got a bunch!
--10 rear cyl head to sump oil drain
-Copy of Tomei sump baffle with metal doors. "Not rubber" Still R&D. Only drawn up atm.


hmm. I guess thats it.
I have some friends that have designed the fan shrouds that I can market for them if anyone is interested. As well as pieces needed to box in your oem suspension pieces. Got I think most all susp pieces already. Thats aside from this thread so please, if interested, PM me or call to keep this thread clear. Thanks.

[jdms13rhd]

So if I want to actually be able to shift after 5 grand without worry on my stock 26 what would you recommend?

This question is irrelevant to this thread and besides, there is no ONE answer to that sort of question. There are many variables. If you cant shift your car after 5k because you know something will brake then I would assume you have other issues. In factory form you can run your rb26 up to 8k factory red line. If your engine cant do that then you should diagnose your problem and fix it.

[Brando13]

Ok now I'm confused. The 1990 rb26dett had the oiling issue at high rpm which causes engine failure. Which is why they say use an r33 or newer crank or get the collar machined? But your saying that that's not true??? Sorry bout hijacking the thread. Shouldve pmed you.

[jdms13rhd]

Ok now I'm confused. The 1990 rb26dett had the oiling issue at high rpm which causes engine failure. Which is why they say use an r33 or newer crank or get the collar machined? But your saying that that's not true??? Sorry bout hijacking the thread. Shouldve pmed you.

Im sure if you didn't ask that someone else would have. So its okay!

You need to think about the problem more dynamically. What you said above is true to some aspect. The aspect that I do not agree with is that the proper solution to early R32 engines is to get a R33 crank or jun collar. You buy my collar, install, and that "ONE" issue is solved. ALL Nissan cranks and Jun collars have excessive clearance as mentioned in my description and what I offer is a proper collar with a tighter clearance.

May I offer another example that some people may have a better idea understanding: Buying a Jun collar or buying a newer crank "or using any nissan crank" is like banging a loose chick. It still works but could be better. A tight chick would be the comparison to my collars in the oil pump.

Sorry if I offended anyone

[Brando13]

Ok cool. Ill delete all my posts to clean up your thread. But thanks for all the info. Can I PM you for more?

[jdms13rhd]

The 1990 rb26dett had the oiling issue at high rpm which causes engine failure.

Its not just the early R32 engines that have an issue. Nissan did extend the flat on the oil drive but never fixed the clearance issue. Only reason you are hearing that the r32 engines have engine failure at high rpm is because when you hit the rev limiter the crank will actually vibrate. That vibration disturbs the motion of the oil pump and since the clearance is excessive the crank jingles inside the oil pump causing it to crack, causing loss of oil pressure, causing seizure of bearings and material of the pump itself getting plumed throughout your engine possibly causing more destruction, ect. I have spun both R32 and R33 cranks on both OEM and N1 pumps. when I pull the engines apart I can see that the contact patch on the flat and the lack of contact they have. You can see this problem on ANY engine you pull apart unless the crank was fitted with a custom collar with proper clearances like the units I am offering you.

i just had a rb26 crank shaft in the machine shop yesterday to get fitted with one of my collars. The Jun collar was destroyed in that process, am i mad? NO. Id rather have my collar on a crank then a "loose chick"

[jdms13rhd]

Ok cool. Ill delete all my posts to clean up your thread. But thanks for all the info. Can I PM you for more?

you can leave your posts. Or I will keep your quotes. Everyone on this forum should know about this problem and EVERY thread that gets made on this issue leaves out the most important fact!

Funny how I stumbled upon this issue. Sold a rb25 to a friend in edmonton. He was going to rebuild it. He bought a N1 pump and Jun collar. we were board one night and placed the collar inside the pump and were shocked to see how loose it really is. So i measure and its got .006 of an inch on each side!

I shake my head.

I assume that Nissan sub contracted out the pumps and messed up on the blueprints and now every company has used that same "incorrect" measurements, including Jun!!!

[bellis_GTR]

lol I just learned so much from this thread.

[jeff]

pm sent!! want one!!

[J.V.D.Skyline]

Hey allen how much for the -10 AN oil drain?

[cschepp]

Is that the oil drain from the back of the head? If so let me know how much.