Bypassing the blowby gas system to a catch can?

[Rocket Science Racing]

Come on, guys. You are way overcomplicating this.

If you go straight to a catch can and vent to the atmosphere you will never
notice the fractional and insignificant change in air count.

If you choose to filter, just go buy the cheapest POS in-line fuel filter
you can get. I used to use a clear plastic one so I could see when to change
it more easily. The problem is it gets incredibly dirty right away. The
amount of crankcase blow-by is remarkable in an inline 4 turbo motor,
especially a chipped or otherwise highly boosted one. So instead I went to
the catch can.

My old turbo AWD Talon was exactly the same.

To get max. benefit from this, you want to remove your intercooler and hoses
and clean all the existing oil out of them. Intercooler efficiency will go
up substantially when you get all the oil out of it.

Scott
98.5A41.8Tqm

 -----Original Message-----
Date: Wed, 2 Jun 2004 21:14:49 -0400
From: Brett Dikeman <brett at cloud9.net>

At 9:03 PM -0400 6/2/04, Huw Powell wrote:

>Couldn't one use some sort of filter, like a compressed air water
>filter, to trap that oil before it gets into the intake tract?

Yes, one can be made from brillo pads and a suitable container with
two connections.  There's also something rather similar made by VW
that was on some cars- a lister sent me a photo and P/N once, it's
buried on my system somewhere.  It's kind of small, not sure how
effective it would be on a tweaked audi motor.  That's the cheap way.

   The expensive way is an air-oil separator, which is made by 1-2
companies for the aircraft market; aircraft engines tend to blow a
LOT of oil out the crank vent since they run at full load most of the
time; heavy oil consumption is the norm.  The air-oil separator
condenses nearly all of the oil vapor and returns it via a drain
line.  They cost over $200, I think....and when I asked them if
they'd be interested in sales to automotive users, ie a group buy- my
emails were repeatedly ignored.  The positioning of the inlet and
outlet was also less than convenient.

Brett