rb25 oil problems

[drivinsidewayzkouki]

so ive read just about all the stickys on the rb25 oil problems most of them said to just put the tomei oil reducers in others said to just put 2 in and block off one and another one said to run return lines from the back of the head and put restrictors on the turbo fead line im very confused because all the threads have different answers and one thread stated that no modifications need to be made to the rb25 and that its just rumors started for no reason so which one is correct

[StricNyne]

i had my rb25 in toms river right on route 70 a few years ago lol, ne way since the rb25 uses hydro lifters you do wanna have a good amount of oil in the head, and i think toooo many mods will not leave enough, so i just followed what tomei did to the T and follow their instructions and did 1 restrictor, not saying i did the best thing, i just figured tomei had been doing this for a while and they did a ton of R and D and figured the optimal amount only required 1 restrictor

[Coolwhip]

The topic is confussing because you're mixing up applications.

Variables:

Which motor?

What series or year?

What type of racing or use? (Daily driver, high revs, alot of plumbing, weekend track use, purpose built track car?)

Turbo setup? (ball bearing turbos regardless of which motor they are put on requires a specific amount of oil, as in not over doing it to the turbo. So you restrict the flow going to it.)

And the list goes on. This area doesn't require much heartache after you have attacked it with the proper research.

Anyways quick overview:

Most likely you're going to need a crank collar.

Restrictors to the turbo depend on what type of CHRA your running either bb or not.

Restrictors to the head depend on how much oil is flowing to the head at high rpm's (if thats what your going after) and your valvetrain set up.

Oil drain back relates to the above bullet, but is an inexpensive insurance.

Oil Pumps have been covered numorous of times and can be adjusted for flow and pressure.

Plumbing, obviously if your going to plumb all type of crazy stuff like large external cooler, filter relocate, etc. You'll need to take that into account as well.

Oil temps, climate, application use goes into what types of oil your going to want to use, which also plays a role on what type of pump you're going to use.

To simply put it, you can forgo any of the techniqual aspects of the oiling department or properly set it up like a well aligned and planned suspension setup.

Hope this helps, search on!

[drivinsidewayzkouki]

thank you both for excellent answers its just i was reading every post everyone wrote and its like peolpe where hooking up alot of unnessary stuff , it look so one restrictor and tap a oil drain return on the back of the head is the best way of goin about it

[Darius]

Yes for what most people use their RB for, that is plenty.