Forced Induction Supercharger/Turbocharger

crankcase ventilation please help!

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Old Oct 19, 2007 | 01:40 PM
  #1  
jammer94's Avatar
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crankcase ventilation please help!

i did a search and came up with nothing rocksolid as in what to do...

what i was figuring to do was weld 2 10an bungs one to the driver side the other to the pass side valve covers to a vented catch can with a drain petcock at the bottom of it...into something like this

http://www.allstarperformance.com/product.htm?prod=26

then my problem is what do i do about a vaccum source off the intake to get the contaminants out of the oil and system. i read to leave the pcv valve in place then add a oil/water separator in line then hook up to inlet side of the TURBOS....but heres my problem i dont want oil in my IC or in my TURBOS at all only whats supposed to be in there lubricating it but not through the intake passages

what do i do on this end to pull vacuum w/o using the inlet of the turbo will i be forced to use a seperate vacum motor to vent contaminants from the system...but then they said i would need to add a checkvalve inline to the seperator..
plus i would have to weld the pcv port on the intake shut in order to delete it, is there another way to go about providing a vacuum source to do so.

any help would be greatly apprecaited.
Old Oct 22, 2007 | 10:41 AM
  #2  
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I have been design of a crankcase e_vac. From all the posts here, I see some are using a baffeled oil catch can with vac from the intake side of the compressor(s). I considered that. Then I looked @ running a seperate vac pump. I went to gzmotorsports.com They have alot of hardware to choose from. My problem was vac_pump mount and drive. I'm fabbing a v_belt system off the crank (surpentine would not fit). Not alot of room down there. I'm running a D1 on a lt1 383ci (6" rod) with AFR heads (etc.) Gzms did not have a mount set-up for my app., so, as usual, I have to design my own. I'm confused on the ideal rpm to run, and, still considering pulley ratios. I will be also fabbing an oil recirc circuit to provide lube to the vac pump since car will be run some on the street. Hope this helps. (97ss 383 D1 M6) B.
Old Oct 22, 2007 | 11:21 AM
  #3  
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I've been running this catch can off my passenger side breather line successfully. Just pulled it this morning to check it after 2 months of spirited daily driving and it had about 3 drops of oil in it. The Pcv hose on the drivers side intake is still stock lines and PCV valve.

Old Oct 22, 2007 | 01:39 PM
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hey mzgp5x keep us posted on the system you are trying to setup as i would like to see it...

i think the idea up on here generally is besides the oily messes we forced induction guys dont want oil all over are turbos/blowers internals...and especially in our FMIC...
Old Oct 23, 2007 | 09:57 AM
  #5  
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OK, I will take pics. I was considering a Vac catch can setup similar to the prev post. But @ low throttle speed, I'm thinking I will have positive crankcase pressure especially with a 6" rod. So, I decided to go with a vac pump. Currently machining parts for pump mount & drive assembly. There was no room under hood with a serpentine setup.

I decided to go with a pump since I had blown out the front pan gasket (a felpro). It was not an easy fix with a Canton pan and an M6 trans.

I also have had oil thru the blower. Good thing I run MAF on intake side. B.
Old Oct 23, 2007 | 02:24 PM
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let me see some pics when you can where do you plan on mounting the pump as i already have a relocated alt. down by where a/c comp used to be and no longer have a/c or p/s let me know.
Old Oct 24, 2007 | 07:49 AM
  #7  
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The problem I encountered with a surpertine drive mount is rpm speed (pump limit @ 5k rpm). I run a March underdrive (5.3"'), and, even with that (AC deleted), I needed a 7.5" pd pulley for 7k rev rpm. The problem with LT1 F_bod's is the drive. So, I'm going down_lo off the crank inside the 12 rib D1 drive pulley. There is no where to mount vac pump off the left side of the motor with supertine drive, so, I will fab a spring compensating pump mount attached to the motor compartment Rt side rail. I have ridgid motor mounts, so, I think this v_belt drive will work. Finished the drive mount sheeve arrgt yesterday. Helps to have a lathe and mill. B.
Old Oct 24, 2007 | 10:27 AM
  #8  
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keep me posted bud as i want to see this...
Old Oct 29, 2007 | 10:14 AM
  #9  
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The gzms pump will not fit underhood due to rad and fan interfearance. So... I cut the rad support (top and lower). It will fit now. Some minor fab (easy). Thanx for the other posts on rad cutting. B.
Old Oct 29, 2007 | 11:35 AM
  #10  
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well clearence is no issue on my car as i am running my setup in a b-body roadmaster so space is just about everywhere. keep us posted.
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