Oil Control In Rb's For Circuit Drag Or Drift

[Crossie]

ahh yes, ye olde shut throttle body. cheers

the bottom of my first catch can runs to the sump, would that make any difference?

[zebra]

Won't be much in the way of blow by with a closed throttle though.

[fatz]

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

[KiwiRS4T]

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

Not keen on the sump to oil cap line. Interested to see how it works!

[fatz]

yea the track will tell the truth

[HotRodderJoe]

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?

[B-rice]

Don't think they had initially built it to be conastant high reving. Different design brief to what theyre used for now.

[fatz]

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

[BoostdR]

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 June 18, 2014 by BoostdR

[BoostdR]

Double post

Edited June 18, 2014 by BoostdR

[fatz]

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

[BoostdR]

Understood. And I feel your interim solution will work. Hobbs controlled relay to turn the scavenger pump on under boost only is the go.

M

[Adz2332]

Can anyone recommend a few places to get quotes from to make baffled catch cans? that know what there doing lol....

[HR31-PASSAGE]

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

[KiwiRS4T]

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.

[gotRICE?]

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.

[HR31-PASSAGE]

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

[BoostdR]

You still have 2 restrictors? which head is it neo(solid lifters) or older(hydraulic)? way to much oil. what oil pump?

[HR31-PASSAGE]

Yes 2x2mm restrictors

It's a s2 hydraulic head

N1 oil pump with spool billet gears

[BoostdR]

whats the 25 block have?