Crank Case Ventalation

[mongol]

Beating a dead horse!

I have a 89gt. Fresh rebuild, gt40 heads and intake's,tfs1 cam and a paxton sn93 blower. I installed the paxton sn93 I bought this weekend but have a few more question involving ventalation.

I capped off the port on the oil fill tube and the port on the throttle body that it went to.

I'm using the stock valve cover with no port for a vent. SO.......

1. Can I run the stock PCV before the blower and be done with it.


Or do I need more ventalation. I REALLY don't want to have to buy new valve covers as I spent all my money on the blower setup.

Thanks again, Kris

P.S. I was down stairs looking at the car and had a revelation. I do in a sense have a vent on the pass side valve cover. The little hole that comes out of the fill tube. Can I put a breather on that and leave it open to the atmosphere and solve my problem. Or should I do both.

[speedytang]

You can put a little filter on that oil fill stub or get the K&N filter that takes place of the oil cap.

[mongol]

Speedy stang, If I do that do I leave the PCV alone and in it's stock form or run it before the paxton head unit.


Thanks kris

[speedytang]

Stock location.

[slownlow]

Why would you remove the hose from there anyway? Also why do you need to add a breather? Lastley does anyone have part number for K&N filter?

[speedytang]

You remove the hose because blow-by will put a oil mist into the throttle body from that tube coming off the oil fill tube. You don't really need a breather unless the motor is building up pressure and causing the oil stick to push up causing oil to splash every place.
K&N ENGINEERING 62-1495

[slownlow]

you da man...

[mongol]

Speedystang,
You said that the vent should not be put on the oil fill cap unless you have excessive blow by blowing out the dipstick. Since I just rebuilt it it might be ok. You think that I should just leave the pcv stock and cap off the oil fill vent. If it doesn't blow out the dipstick then do nothing and if it does then I will add the breather on the oil fill tube. Sound like a plan to you? thanks Kris

[speedytang]

That is exactly what I would do.

[89LX]

I added the K&N screw in breather cap and it works just fine in my 89LX.

[RSNovi]

Put the breather on the oil fill on the valve cover. Take your PCV valve and drill a larger hole in the bottom so you can push out the plunger. Install the gutted PCV valve and run a line from the PCV valve to the barb on the oil fill.

This works great on my setup.