lookforjoe Posted March 12, 2010 Author Report Share Posted March 12, 2010 What does your inlet tract into the turbo look like? The turbo can make vaccuum in the compressor inlet if the air filter/etc are too restrictive. This will suck oil into the compressor inlet. Suck oil out of the breather system via the PTC? 2.75" from filter to turbo K&N RX4870 xtreme filter I've had this since I first installed the turbo, through iterations of my CAI, open cone, encased cone, etc.... Quote Link to comment Share on other sites More sharing options...
Captain Bondo Posted March 12, 2010 Report Share Posted March 12, 2010 Oh crap you still have the breathe rplumbed in pre-turbo? I was talking about sucking oil out through the compressor seal, but if you actually still have any hoses connectect to the crank case plumbed to the turbo inlet, that won't help either. That is bad bad news if that's the case. Quote Link to comment Share on other sites More sharing options...
BlackT5 Posted March 12, 2010 Report Share Posted March 12, 2010 (edited) Oh crap you still have the breathe rplumbed in pre-turbo? I was talking about sucking oil out through the compressor seal, but if you actually still have any hoses connectect to the crank case plumbed to the turbo inlet, that won't help either. That is bad bad news if that's the case. Yea, I was wondering what you were talking about. I re-plumbed mine too. I had the catch can venting to the atmosphere for a while but the oil smell got to be too much. I have a bit more crankcase pressure/blow-by than usual because of the forged pistons and loose piston to wall clearances. Even I don't have a whole lot of crap in the actual IC piping, but it still creates a bit of a mess in the intake pipe. What did you do on your car? Edited March 12, 2010 by BlackT5 Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted March 12, 2010 Author Report Share Posted March 12, 2010 Oh crap you still have the breathe rplumbed in pre-turbo? I was talking about sucking oil out through the compressor seal, but if you actually still have any hoses connectect to the crank case plumbed to the turbo inlet, that won't help either. That is bad bad news if that's the case. Mine is like this: (outlined in this Thread) Are you suggesting I remove the breather vent entirely? That makes no sense to me. I'm not going to vent to atmosphere. I don't get much oil in the inlet pipe, I get all the oil in the intake & IC plumbing. How is yours plumbed? Quote Link to comment Share on other sites More sharing options...
550 Posted March 12, 2010 Report Share Posted March 12, 2010 You don't need to vent to atmosphere. But I think he is saying the re-plumbing into the intake isn't a good idea. The idea I had was to remove the PTC heater completely and just run vacuum to the catch can with a check valve to prevent over pressurization under boost. Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted March 12, 2010 Author Report Share Posted March 12, 2010 You don't need to vent to atmosphere. But I think he is saying the re-plumbing into the intake isn't a good idea. The idea I had was to remove the PTC heater completely and just run vacuum to the catch can with a check valve to prevent over pressurization under boost. With mine, though, the breather is venting to the CC, which then vents to the PTC. I'm not seeing how having the vacuum drawing on the CC is a bad thing. The PTC vacuum line (for idle vacuum) has a check valve in it to prevent boost pressure acting on the CC vent... Quote Link to comment Share on other sites More sharing options...
550 Posted March 12, 2010 Report Share Posted March 12, 2010 Essentially he is just saying to remove the part where it vents back into the intake tract. Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted March 12, 2010 Author Report Share Posted March 12, 2010 Essentially he is just saying to remove the part where it vents back into the intake tract. I'm not following your train ... the Catch Can vents to the inlet pipe, not the actual breather. If that is removed, where would the crankcase pressure vent to?For the oil restrictor, I just silver-soldered a piece of steel into the banjo, and redrilled it to .078", that was the smallest bit I could find. Quote Link to comment Share on other sites More sharing options...
550 Posted March 12, 2010 Report Share Posted March 12, 2010 Directly into the catch can, from what I gather that he is saying. I'm only interpreting. It just seemed to me like that is what he was saying. Quote Link to comment Share on other sites More sharing options...
BlackT5 Posted March 12, 2010 Report Share Posted March 12, 2010 Directly into the catch can, from what I gather that he is saying. I'm only interpreting. It just seemed to me like that is what he was saying. I'm not following you either. Hussein, was Hahn not able to provide an ideal oil pressure range for the turbo? Would the oil pressure in the line not be close to what you see at the crank case? Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted March 12, 2010 Author Report Share Posted March 12, 2010 I'm not following you either. Hussein, was Hahn not able to provide an ideal oil pressure range for the turbo? Would the oil pressure in the line not be close to what you see at the crank case? No, they said there really wasn't one, only that pressures around 70-80psi can cause oil leakage from the CHRA. I don't know what OP whiteblock motors run. Since the oil feed is tapped into one of the primary ports down near the oil pump, I would expect the pressure to be fairly high, but I don't actually know that for a fact. Obviously even Volvo expected there to be some oil present, since they added the frickin' weep hole to the IC :rolleyes: Quote Link to comment Share on other sites More sharing options...
Captain Bondo Posted March 12, 2010 Report Share Posted March 12, 2010 Yes 550 has it right. Basically wherever the ptc hose connects to the catch can, remove that hose and install a breather filter. With a filter on the breather there's no way you should have any mess or smell. Even if it isn't the main source of oil in the intake, reburning crank case gases is horrible for a performance app. That oil mist has a very low octane rating and is affecting your detonation threshold. I would just try it temporarily even, see if the amount of oil in the piping decreases. Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted March 12, 2010 Author Report Share Posted March 12, 2010 Yes 550 has it right. Basically wherever the ptc hose connects to the catch can, remove that hose and install a breather filter. With a filter on the breather there's no way you should have any mess or smell. Even if it isn't the main source of oil in the intake, reburning crank case gases is horrible for a performance app. That oil mist has a very low octane rating and is affecting your detonation threshold. I would just try it temporarily even, see if the amount of oil in the piping decreases. So you don't think I should try the restrictor first? I really don't get any oil in the inlet pipe to speak of, with the plumbing as it is. I assumed the oil vapor that I do have in the intake plumbing (as opposed to inlet) is a direct result of overpressure in the CHRA... I'll get a line breather to try anyway. Quote Link to comment Share on other sites More sharing options...
lookforjoe Posted March 12, 2010 Author Report Share Posted March 12, 2010 In other news I've tried a 20psi setting & lower the fuel on a map, and have significantly better timing (now somewhat too lean up top here..) Trying to follow Adam's advice & limit boost below 4k - the Apexi has a setting for that ("NE-Point") - so I raised it to 4K for onset of boost control. My actuator is 15psi, so in theory, I should be close to that. In reality, it seems I'm still over the mark. Quote Link to comment Share on other sites More sharing options...
Captain Bondo Posted March 12, 2010 Report Share Posted March 12, 2010 Missed the question about my own car - I did absolutely nothing. Just a draft tube out of the breather box to atmosphere. No catch can no noting. Worked good. This time around I am going to throw the breather box in the garbage and run lines straight from the block to a catch can vented to atmo under the car and call it a day, just because I hate the breathe rbox.Haha it's leaner with less boost? That is messed up. Does it feel much faster/slower? Quote Link to comment Share on other sites More sharing options...
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