Crossie Posted May 21, 2014 Share Posted May 21, 2014 ahh yes, ye olde shut throttle body. cheers the bottom of my first catch can runs to the sump, would that make any difference? Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7289367 Share on other sites More sharing options...
zebra Posted May 21, 2014 Share Posted May 21, 2014 Won't be much in the way of blow by with a closed throttle though. Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7289369 Share on other sites More sharing options...
fatz Posted June 1, 2014 Share Posted June 1, 2014 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 Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7299751 Share on other sites More sharing options...
KiwiRS4T Posted June 1, 2014 Share Posted June 1, 2014 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! Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7299885 Share on other sites More sharing options...
fatz Posted June 1, 2014 Share Posted June 1, 2014 yea the track will tell the truth Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7299902 Share on other sites More sharing options...
HotRodderJoe Posted June 18, 2014 Share Posted June 18, 2014 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? Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7315043 Share on other sites More sharing options...
B-rice Posted June 18, 2014 Share Posted June 18, 2014 Don't think they had initially built it to be conastant high reving. Different design brief to what theyre used for now. Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7315045 Share on other sites More sharing options...
fatz Posted June 18, 2014 Share Posted June 18, 2014 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 Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7315054 Share on other sites More sharing options...
BoostdR Posted June 18, 2014 Share Posted June 18, 2014 (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 June 18, 2014 by BoostdR Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7315058 Share on other sites More sharing options...
BoostdR Posted June 18, 2014 Share Posted June 18, 2014 (edited) Double post Edited June 18, 2014 by BoostdR Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7315059 Share on other sites More sharing options...
fatz Posted June 18, 2014 Share Posted June 18, 2014 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 Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7315084 Share on other sites More sharing options...
BoostdR Posted June 18, 2014 Share Posted June 18, 2014 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 Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7315092 Share on other sites More sharing options...
Adz2332 Posted June 19, 2014 Share Posted June 19, 2014 Can anyone recommend a few places to get quotes from to make baffled catch cans? that know what there doing lol.... Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7316056 Share on other sites More sharing options...
HR31-PASSAGE Posted June 21, 2014 Share Posted June 21, 2014 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 Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7318091 Share on other sites More sharing options...
KiwiRS4T Posted June 21, 2014 Share Posted June 21, 2014 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. Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7318109 Share on other sites More sharing options...
gotRICE? Posted June 21, 2014 Share Posted June 21, 2014 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. Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7318113 Share on other sites More sharing options...
HR31-PASSAGE Posted June 21, 2014 Share Posted June 21, 2014 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 Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7318119 Share on other sites More sharing options...
BoostdR Posted June 21, 2014 Share Posted June 21, 2014 You still have 2 restrictors? which head is it neo(solid lifters) or older(hydraulic)? way to much oil. what oil pump? Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7318144 Share on other sites More sharing options...
HR31-PASSAGE Posted June 21, 2014 Share Posted June 21, 2014 Yes 2x2mm restrictors It's a s2 hydraulic head N1 oil pump with spool billet gears Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7318153 Share on other sites More sharing options...
BoostdR Posted June 21, 2014 Share Posted June 21, 2014 whats the 25 block have? Link to comment https://www.sau.com.au/forums/topic/110680-oil-control-in-rbs-for-circuit-drag-or-drift/page/58/#findComment-7318160 Share on other sites More sharing options...
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