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BoostdR

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  1. Ok i'm back from testing with some very interesting findings and a theory. I did a 1st to 4th run all the way through the gears turned around and did it again. Pulled over to check the can. It was half full of oil. I left the motor running and opened the ball valve. The oil returned to the sump via the dip stick tube no worries. I thought since the last setup when I ran with the Catch can oil return to sump opened, was with the std pcv and return to rear turbo inlet vaccum lines connected. Since I currently have no vaccum returns and an atmo breather on my secondary can I thought I may aswell open my ball valve on the primary catch sump return and do the same run as above again. My primary catch can is a Provent 200 which has a fine filter so when there is oil in it, it does take a while to filter through/empty giving me a chance to check it after a run before it goes into the sump. I did another run 1st to 4th turned around and did it again. Pulled over and quickly checked the Catch can.....no oil! I went for another run and this time was very very quick to stop pop the bonnet and check the can...again no oil!! I have a couple of theory's. The sump return being open enables equalisation of sump and head pressure... Even positive pressure on top of the oil instead of below it pushing it up. I expect that would make it easier for the oil to return to the sump since the pressure differential is less from head to to sump. I would expect the sump pressure also could vent out the atmo filter in the Secondary catch can(refer to my setup below) With the std Vac lines connected to the head in a car pushing 700hp has a hug amount of vac, this causes a larger pressure differential from the head to sump. Which is why I feel higher boost caused more issue's.....from more vac rather than more blowby. Obviously there will be more of both. I will keep you up to date to confirm it is doing what I think it is. I have a track day on the 25th so will be the best test. I also have a friends RB25/30 with the vac still connected to the catch can(closed system) that does the same thing only on high boost. His leak down was 2.5% Will make the can vent to atom and attach a tube from the catch can outlet to the dip stick tube and see if it is also fixed. My setup now is. Passenger rocker breather connected to Drives side breather connected to Provent 200 catch can(primary) with return to the dipstick tube. From the Primary catch can to a seconday catch can that has a small filter and a drain pipe connected to a ball valve. The PCV has a tap that I close when its driven hard. The turbo inlet(vac) line is blocked off. Cheers, Matt
  2. I could connect my map sensor from my Apexi PFC boost controller that is connected but not used. I could log then aswell. I agree the increased blowby restricts the oil return...but if you see how hard it is to get oil through a Mines Triple flow baffle there must be a huge amount of oil in the head. I have done a leak down with good results...I think the map sensor idea is great....I am going to see if I can hook it up. Should be easy
  3. You are running 2 1mm restrictors....front and rear? I have a drain from the can to dip stick tube but it has a ball valve tap on it. I have a one way valve on order. I filled the can at the hill climb without the ball valve in the can to dipstick tube. The oil would not return untill I swicthed the motor off. I did have the vac still connected at that time.
  4. I also feel the associated extra blowby at this power level is making the issue worse. I will give it a run on low boost and see how it goes from 2nd to 5th...be back in few minutes....
  5. Thanks for that. Do you have a rear head drain at all?
  6. Thats exactely the things I need to hear, real world results. Can I ask some questions What oil pump? What oil? Baffles? Can setup(with std lines -pvc and turbo inlet return...atmo breather?) Sump setup? Power level? Leak down result? Much appreciated
  7. There is definately condenstion in the can to.. If i go from 2nd to 5th @ 1.6bar, Nulon full syn 5W30, 1.5mm restrictor, 113psi oil pressure, 8ltrs of oil. It will fill the primary can...over fill it even.
  8. At low rpm there is minimal oil at high rpm low boost there is a small amount at high boost high rpm there is heaps I have a tap on my PCV line that I close on the track. The other day I left it open and gave it a run. Filled the can to most it has ever...even activated the over pressure valve at the top of the can. I will do so logical tests and give you some direct data. ie rpm, boost, vac open or closed. I was running 10W40 I now Have 10W30 for which Its seems worse(more oil coming out) From what I have read I really need a 1mm head restrictor Maybe less than the 113psi oil pressure(if I reduce this I may go to 1.1-1.2mm restrictor) A head drain to equalise pressure to sump and help return
  9. The pickup was measured to the sump...can't tell you the exact clearance but its reasonably close to the bottom would be 5-15mm off the bottom...I am interested as to why you ask? It is running new valve stem seals. Genuine nissan Remove the restrictor?
  10. Found some info on The lewis Engine web site RB oil restrictors We manufacture many different combinations of oil restrictors for the RB, CA and SR engines. The benefit of them is to restrict the oil flow to the top end ensuring the sump has as much oil in it as possible to prevent oil starvation to the bottom end. Our restrictor sizes and combinations are a decision made up of hundreds of hours testing on track and street cars. Use these combos below and please state when ordering what engine etc you have. 1. RB20 RB25 HYDRAULIC HEAD 2x 1.3mm restrictors 2. RB30/25 head HYDRAULIC 2X 1.3mm restrictors 3. RB30/25 NEO solid lifter head 1x 1.3mm 1x blockoff 4. GTR RB26 ALL solid lifter 1x 1.3mm 1x blockoff 5. CA 18 hydraulic 1x 1.5mm restrictor 6. SR 20 hydraulic 1x 1.5 mm restrictor 7. CA and SR solid lifter conversion 1x 1.3mm restrictor 8. RB25 NEO 1x 1.3mm 1x blockoff 9. RB30 single cam 2x 1.3mm restrictors I calculated the difference in area between 1.5mm and 1.3mm and 1.3mm comes to 75% of what I have(as I currently have 1.5mm) Going from 1.5mm to 1mm is a reduction in to 44% from what I have now. The fact my pump very happily pumps 4bar at idle I feel I can go smaller than I have without a noisy head at idle. the question is...how small?
  11. Would like to know what oil pressure it is running also.. Anyone Know?
  12. Interesting. Any other specs guys on head oil restrictor size?
  13. motor is tight... leak down is 4.5% What head restrictors are people running? Thicker oil should flow less at the same pressure but will also return to the sump slower Its an RB26/30
  14. I tried to replicate the same spring seat pressure as an N1. My gears are much bigger than N1 in width and dimension. The pump flows double a std unit according to the specs. I have trouble working out why it would flow more than any other pump when it is governed by a pressure reg. It should flow the same as any pump if the target pressure is the same....since pressure is a measurement to restriction of flow. Sure more would come out the bypass.... What are your oil pressures? cold idle warm idle warm max rpm mine get to max pressure very quick not long after 3000rpm
  15. No pressure drop. yes fills the can
  16. I am trying to sort my oil controll issues but have had no luck. I have some questions What oil pressure should a GTR run at max warm? Mine sits on 7.5bar-7.75 warm, cold at idle is 7 and warm idle is 4.5-5 What oil restrictor would should I use. Currently has 1.5mm. Car is used on the track mostly but also a streeter. Making in excess of 550kw I have seen plenty of GTRs on te track with similar power without a rear head drain without the associated issues. I am using 5w30 oil atm The engine also has Mines baffles. Reinmax Oil Pump I have run out of ideas to fix it so the next step is pulling the motor and reducing oil pressure and changing the restrictor size. Would like to confirm if I am on the right track. Regards, Matt
  17. Belay my last over. Went 2nd through to 5th and filled the catch can again.
  18. 6boost manifold. if you have a twin scroll turbo make sure u have a split pulse manifold to compliment as for the oil pump, this is the easiest option Oil pump gears I haven't used on but it looks ok. I would confirm the correct width
  19. Ok I now have 80% less blow by into my catch can. My guess is when the oil is at the back of the head it gets less aerated and foamed up. The cam lobe baffles were here <---- front : : D D : : : : : D D : : : Now they are here : : : : : D D : : : : : D D The original placement makes sense for the std baffle. I would like to see how it went with extra cam lobe baffles at the rear with the standard rocker cover baffles : : D D : D D : : D D : D D My theory is when the oil starts to pool around the lobes it gets aerated and foamed up to the extent it doesn't want to return to the sump easily. The lightness making it travel out the breathers easier. I noted directly after a run when looking at my Provent oil/air separator(screw off lid) that the oil was full of bubbles....not really foamy but very bubbley. food for thought
  20. The idle control solenoid is under the Plenum. Usually makes a hiss. If you were leaking boost your car would be running rich. Check cam timing -if its retarded -if the inlet and exhaust cam are aligned correctly with the crank Check if the spring is inside your inlet pipe (after AFM) It stops the hoses sucting closed under boost.
  21. I decided to check my Mines baffle plates. I have found that the cam lob covers were put pack in the std position not where they should be for the Mines setup which is at the back below the baffle opening. I have moved them and will see how it goes,.,....
  22. looks like a R33 series 2 turbo to me. Carbon composite compressor wheel. I run this model on my race car(323 in my signature). Spool is extremmely fast. I have only seen metal compressor wheeled R34 turbo's but I could be wrong. Great turbo never the less. least lag and most power of all the rb's
  23. $1800 for injectors is a little insane.. Some of the Honda guys have been having trouble with these injectors on idle. Honda guys ID2000 idle
  24. where did you by them and how does the car idle...what rpm?
  25. Absolutely, I just have to pay online. haven't driven it for a while so let it run out.
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