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Oil Control In Rb's For Circuit Drag Or Drift

Sydneykid

By Sydneykid,
in Forced Induction Performance

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iruvyouskyrine
iruvyouskyrine

Whoops, yes i did mean catch can, corrected it now. Yes i understand that now. The two goals are to reduce the amount of oil entering the head, and equalize crankcase pressure. The oiling issue is s

fatz
fatz

less thinking more doing shit that works in the getto Dash ten on pasengers side Two dash 12 on the drivers side, angles and spaced so as not to hit shit and be able to tighten the f**ker up note

SimonR32
SimonR32

I ran my set up right up to 8800rpm at 2 bar (740rwhp) around the track with sticky R-comps the other night and not a drop out of the catch can. This is with no oil restrictors to the head and a stoc

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  • 2 weeks later...
fatz Grand Master

fatz

Posted
Posted

my latest setup

autech catch can with a line to a electric oil pump pumping to sump

second catch can

couple of breathers to it

-12 drain with one way valve on the bottom

extra -12 breather to sump to oil cap

tell ya how it works on the long weekend

jex11_zps93d6c796.jpg

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KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

my latest setup

autech catch can with a line to a electric oil pump pumping to sump

second catch can

couple of breathers to it

-12 drain with one way valve on the bottom

extra -12 breather to sump to oil cap

tell ya how it works on the long weekend

jex11_zps93d6c796.jpg

Not keen on the sump to oil cap line. Interested to see how it works!
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  • 3 weeks later...
HotRodderJoe Apprentice

HotRodderJoe

Posted
Posted

Would it help to put in a hose from the top of the sump above the oil level connected to the top of both cam covers to equalize the pressure and allow oil to flow down? I'm surprised Nissan have this design fault with the RB engines and I'd be interested to see what they say about it. From what I can tell it's only a problem for high revving drift and track cars?

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fatz Grand Master

fatz

Posted
Posted

Would it help to put in a hose from the top of the sump above the oil level connected to the top of both cam covers to equalize the pressure and allow oil to flow down? I'm surprised Nissan have this design fault with the RB engines and I'd be interested to see what they say about it. From what I can tell it's only a problem for high revving drift and track cars?

autech thing does that

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BoostdR Mentor

BoostdR

Posted
Posted (edited)

The restrictor in the block needs to inversely match you oil pump flow. Bigger the pump-smaller the restrictor.

Only way to fix it properly. All other methods are treating a symptom not the cause. Nothing wrong with the rb block.

I had a .9mm restrictor with my reinmax pump. No problems at all with full slicks and 850hp on the track

Edited by BoostdR
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fatz Grand Master

fatz

Posted
Posted

The restrictor in the block needs to inversely match you oil pump flow. Bigger the pump-smaller the restrictor.

Only way to fix it properly. All other methods are treating a symptom not the cause. Nothing wrong with the rb block.

I had a .9mm restrictor with my reinmax pump. No problems at all with full slicks and 850hp on the track

True that, ultimately though as the engine ages and you want to keep going you have to treat the sympton

so you get that extra 3-5k of track time before refresh

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HR31-PASSAGE Veteran

HR31-PASSAGE

Posted
Posted

Hey guys I've got an rb25/30det making around 400hp atm having issues with the oil flow I pulled the head off & measured the restrictors they seem to both be 2mm I'm running an N1 oil pump with spool billet gears getting 3bar pressure on idle now on hight revs I'm getting more then normal oil into the turbo intake pulled through from my catch can, I've put a 3mm restrictor on the like that runs to the turbo intake but it's still pulling oil through.

What block restrictors would be the best to use in my application?

Cheers

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KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

Hey guys I've got an rb25/30det making around 400hp atm having issues with the oil flow I pulled the head off & measured the restrictors they seem to both be 2mm I'm running an N1 oil pump with spool billet gears getting 3bar pressure on idle now on hight revs I'm getting more then normal oil into the turbo intake pulled through from my catch can, I've put a 3mm restrictor on the like that runs to the turbo intake but it's still pulling oil through.

What block restrictors would be the best to use in my application?

Cheers

Spend some time reading the thread and decide for yourself. I have 2 x 1.0mm

Why would you put a 3mm restrictor in a half inch hose? If you have oil coming through there you need to address the problem. Answers are in the thread.

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gotRICE? Veteran

gotRICE?

Posted
Posted

Well the factory hose has a restrictor in it before the turbo inlet so it some what makes sense.

It probly more

like acts as a baffle so the oil drops out of the air and drains back to the head instead of into the turbo inlet.

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HR31-PASSAGE Veteran

HR31-PASSAGE

Posted
Posted

I don't have half inch hose. It's -10, my catch can in plumed back into the sump so I thought I'd put a restrictor inline to stop it pulling oil from the catch can as it drops down from the top lines.

& I've read heaps of pages & couldn't find anything hence why I posted didn't know it was gonna be a big issue posting lol

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