merchauser

I know nothing about the physics involving proper venting of a crankcase system. i am guessing that most of this is for emissions
and environmental concerns? I see that a number of products exist that modify the factory set up, and while attractive,
these are not just high on the priority list.

what I do understand is that the crankcase needs to breath, but I hate the idea of those vapors going back into
the intake and/or throttle body.

with that in mind, is there some minor modification that can be done? my first thought is to cap the venting that goes into
the intake. can those lines just be capped off and the hoses from the valve covers vented to that atmosphere? I had a 3.0CS
a while back, and the only engine venting was a tube coming off the valve cover, that fed a hose into the air cleaner. I ran
a very long tube, off of the valve cover, and extended that under the car and behind the passenger compartment, and
capped that off with a small filter. can I do something similar with this set up, or is it a lot more complicated?

PS I don't seem to have any "issue" to address with the breathing system, but I am swapping my plastic oil filler for a metal one, and thinking I
could deal with some of the breather tubes off of the filler while I am in there

suggestions???

ptuomov

FredR is running a setup on a near stock car that might be interesting to you.

SeanR

merchauser

Sean, I like that answer for sure! sounds like a non issue for my car, so with that in mind, can I cap off the port from
the rear of the oil filler to the TB, or still a waste of time???

calling fred for comment......

Speedtoys

Only thing you need or want to do, is the Greg Brown oil separator under the filler neck when you get in there.

Do nothing else.

Ducman82

if the crank case cant vent... problems happen

merchauser

that was my plan, and happy to hear, there seems to be agreement.

is it fair to say that this is primarily a GTS issue with GT/S4 and earlier not to worry about?

The Forgotten On

You need the crank case to vent somehow. If it is blocked off you will damage your engine internals, blow out gaskets, and spew oil all over the front of the engine from the dipstick tube.

The pressure will find the weakest link and escape using it.

I have a Provent hooked up to the passenger side cam cover and a few hoses hooked elsewhere. It then vents to the smog pump which I setup to only vent to the filter housing.

It separates over 3 oz on extremely spirited driving with runs to redline over 25 miles.

If this wasn't in place the engine would suck in massive amounts of oil (like the stock system) and shoot out blue smoke.

If you don't feel like making a custom setup you can get Greg Brown's Provent system which connects to the intake like the stock system does.

Now the engine in my 89 doesn't drink a drop of oil.

If you do any really spirited driving above 3K RPM I highly recommend you use an air/oil separator to reduce ingested oil and to keep your intake clean.

Speedtoys

All S4+, GTS has -other- issues WRT oil management beyond this, but is certainly affected the most by it.

All I have is GBs "Oil Filler neck baffle" via http://www.precisionmtrwerks.com/products/products.htm

And I dont suck up a single drop.

Crumpler

merchauser

Crumpler, this is exactly my plan, but I am curious to learn about what others have done and what cars are most problematic.

your post was interesting to read, and more interesting to hear that you came full circle. since you mention in that post about oil in your intakes,
can you report your results by going back to stock venting along with the GB baffle? did you also install the stock S3 baffle?

Speedtoys

This is a 20-25-30yr old topic. Some things are best left as history and reviewed. An insane amount can be learned via google, search here on RL...and the decades long boiled down answer is the GB part.

There are others like it, but has seemed to work the best.

Boosted apps, full racing...may require other solutions, or not..

ptuomov

I agree that reading what's already done is the best first step.

One thing that I think the RL knowledge-base under appreciates is the benefits from breathing out from the back of the engine under deceleration and from the front of the engine under acceleration.

Crumpler

merchauser

after much searching, I still had not found answers that I was looking for. that's why I started this thread. if its old hat for many,
sorry for the redundancy; no one need comment or respond if they are bored or sick of it.

personally, I never tire of learning more, and all the information obtained, helps me make the most informed decision

i have learned from this thread and already commented that i will be install the GB baffle, S3 baffle, metal filler neck and, leave
all the stock plumbing for breathing.

thanks to everyone for there comments and insight. HUGE help. thanks again