Forced Induction Supercharger/Turbocharger

Evacuation or PCV through the exhaust

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Old May 14, 2009 | 01:09 PM
  #1  
jsetzer's Avatar
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From: Moore OK
Evacuation or PCV through the exhaust

More of a statement than any questions here.
I've found bits of info on various car forums. Not a lot of info here.

I'm not going with the MR gasket kit, but pretty similar.

Using two check valves with the angle cut tips. Will weld them in just after my 02 sensor but before my cutout. These are supposed to work best on vehicles with low or no backpressure. I'm not running a muffler so hopefully theres not too much on that side of the turbo. I know pre turbo I have a ton of backpressure.

I'm welding the top breather/hole shut on the valve covers and coming out the back of them with barbs or some kind of fitting. I was going to go with AN stuff, but my car doesn't deserve anything that nice.

Capping off all of the stock pcv - I don't want anything recirculating into the intake. No more oily nasty intake. I fear I may be wasting some oil - but any solution is going to have a little in the blowby. I'm skipping the catch can - it can run out the tail pipe... shhh don't tell mr epa.

I'll report back on how it does. I'm gone next week on b'ness. But if my headgaskets show up while I'm gone I should get it close to running again over Memorial weekend.
Old May 14, 2009 | 02:43 PM
  #2  
cause4panic's Avatar
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From: NYC
i drilled out the stock location on the pas side, removed the baffle. and made a matching hole on the drivers side. i used the summit kit i think. The breathers come with grommits that just plug into the hole you make in the valve cover.

no catch can here
Old May 14, 2009 | 03:02 PM
  #3  
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From: Farmington Hills, MI
I run an exhaust evac with my turbo. The valve is welded to the DP about midway between turbine exit and open pipe (no muffler). I have a vac. gauge that I need to get hooked up to quantify vacuum in the crankcase - but it seems to keep the oil cleaner than the breather setup which always smelled like fuel. You get some suction on the valve cover end at idle. I suspect however, that because DP pressure is greater than open header (NA or Supercharged) that you will lose pull at X,XXX rpm at which point the valve will close. If you add a muffler you will also reduce effectiveness. When I get the vac gauge on I can report back.

The best method in my estimation is a vacuum pump.

-Scott.
Old May 14, 2009 | 10:22 PM
  #4  
MikeGyver's Avatar
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From: Orem, UT
I'll be using my smog pump to draw crankcase vac under boost. I did some testing and it pulls 3" when deadheaded @ 12volts, and 5" @ 24v
Old May 17, 2009 | 10:24 AM
  #5  
boosted-lt1's Avatar
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From: Farmington Hills, MI
Here's some interesting stuff.

http://www.dragstuff.com/techarticles/vacuum-pumps.html
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