robot808

Background: I just changed the OP gasket in my car, but I think the bulk of the oil I am leaving on the ground is from my oil control set up.

Bear in mind, that this is the first car I have ever modified, so my understanding of these systems is very basic, if not plain wrong.

My 82 has a 928 Motorsports SC. I installed the oil control kit that includes a baffle, new insides for the oil seperator, a gravity drop that leads oil back through an inlet in the cam cover, and a hose to vent to atmosphere.

The problem: The hose that vents to atmosphere seems to mark the cars territory with quite a bit of oil.

I included a picture because it is possible that I messed something up. I ran the hose tin question down the back/driver's side of the engine,pretty far down. My thought was that it I didn't want oil mist spaying on the windshield.

The questions: Did I just create a gravity drop that leads to the wrong hose?
Should I get a dry sump vent to catch the oil and just empty it out every once in a while? I saw some online that look like that is what they do. I have no problem doing that if that is the answer.

Here is a picture of the current set up. You can see the vent hose run under the spider and exit between the third and fourth runners on the DS.

Thanks for any help,

robot808

This is the kind of vent I was looking at:

Ducman82

any oil will natural "flow down" that hose, build up than leak. vent should always be up top.

The Forgotten On

I would copy what they show in their site.

robot808

The Forgotten On,
Are you saying that I should get a catch can?
With the parts supplied, it was not possible to copy that picture. I have no catch can.
I could not even plumb the hoses the way this picture shows. I tried, but the hose kinked. You can see that the "T" supplied is much larger than in the picture you posted, and that they have no fuel rails to navigate around.
Carl told me that they stopped running the line back to the intake and just to vent to atmosphere.

Jake,
I get what you are saying. I think it is going to be a bit tricky to run those hoses with no kinks and keep the line up. I imagine that if there is a "U" shape to the hose that oil will just collect at the bottom and eventually clog the hose?

The Forgotten On

You could get a simple catch can to catch the oil leaking out an then pour it back into the fill port or you could zip tie the hose up one of the intake runners so the oil is forced by gravity to go back into the cam housing; you could also rotate the oil tee up a bit so it doesn't point the vent hose straight down . I'm sorry that the picture was misleading.

Ducman82

rotate that fitting so the does not want to flow down it, rather it goes in to the cam tower like it should. catch cans work great, but require you do do more WORK (emptying it etc)....

GregBBRD

Congratulations. The last car that allowed you to vent oil fumes to the atmosphere was a 1956 Chevy.

In 1957, the federal government required the crankcase to be closed, for all vehicles.

In your quest for cheap additional horsepower.....you've violated every federal emission law, for the past 57 years. The fine, for venting the crankcase to the atmosphere, is $10,000 per day.....for both you and the supplier of the "pieces" designed to bypass the ventilation system.

Here's the reality:

If you can't "close" the crankcase and not have oil vapors puking to atmosphere.....you shouldn't be bolting this stuff onto a motor vehicle.....no amount of power is worth this amount of pollution.....it is gross.

robot808

Greg,
Don't you build engines for auto racing?

GregBBRD

Well, street cars and race cars are clearly different animals.....one has license plates and has to pass federal laws. The other has no license plates.....but still is under federal regulations. Interesting to note that there is no provision in the federal law to de-federalize a car, for racing purposes. Minor technicality.....however true.

Note that every current race engine, from Porsche, has a closed crankcase.....since the mid 1970's.

and I, personally, have not built an open crankcase race engine for over 15 years......and I can't remember the last time a built a street engine with an open crankcase.....except maybe an engine for a 356.

How you guys rationalize this **** as being OK is way beyond what I can understand....it's a major stumbling block, for me.

upstate bob

Is it possible you may have aimed the louvers under the seperator in the wrong direction? I too suffered from the majestic oil plume under hard throttle and high rpms on my 79. I also installed the 928 motorsports oil control kit and gave it a test without finishing the seperator mod. -louver plate and cam chamber T drain only. Worked great. I can nail it to the wall and no smoke, no drips on the floor in the garage, and no oil soaked air filter box. satisfied customer.
original 79, 5 speed, 75K mi.

robot808

Greg,

I have tremendous respect for you and your work. So, I don't even like having this discussion. However, I find it difficult to take this lecture from you. Seeing as how (at least part of) your job is building cars for people to drive around in circles for sport. I love watching racing (particularly Rally), so please don't take this wrong, but when I drive my car, it is to go somewhere. Part of what you do is facilitating the driving of cars purely for fun. No utility in the burning of the fossil fuels or the emissions.

Now, having said all that, I don't expect you to turn around and renounce your life of evil. I think you are awesome. I appreciate what you do for all of us. I really and truly do.

I am sure that despite this modification, my car is less of a EPA disaster than when I found it years ago, leaking everything it could leak, backfiring, bad 02 sensor, and just about every other kind of sensor.

I hope that I have not said anything offensive. I really am trying to learn this stuff, and I learn a lot from you.

Philosophically, I can survive this.

robot808

bob,
Thanks for the response. I don't think it is likely that the baffle is backwards. IIRC, the baffle I'm am using is very clear as to which way it goes.

toofast928

Rob,
16v can not be vented from the cam towers. At high RPM oil is being pushed into the oil separator and eventually out of the road tube.

Tony-

GregBBRD

I look at things differently.

I believe that a Prius is an environmental disaster.....I believe that the entire "battery" thing is going to turn out to be a huge problem......from the creation of the materials to the end disposal. When one of these cars is "crashed" and the batteries are leaking all over the highway....what kind of an environmental disaster is that? And how do these cars get their batteries charged? Through the electric grid. Is there a less efficient way to do this? Burn fossil fuel, to make electricity, to then charge the batteries on a Prius? Seriously? Every electrical engineer on the planet knows the losses involved in doing this. It's one hell of a lot more efficient to burn the fuel directly!

As far as the 928 supercharger thing goes......a bit difficult to put into words....but I'll try.

And this is not personal....it's just my general gut feeling about the entire "supercharger" thing that is going on.

I believe that the 928 is one of the finest vehicles ever made....by anyone or any company.

"World Class" vehicles.....the best of the best.

The 928 "legacy" will end up being a combination of many factors.....and anything that detracts from those factors "hurts" the legacy of these vehicles.

I, personally, try to build art. Engines, transmissions, vehicles that are pure works of art. That's my goal. I'm trying to "create" the next generation of "Shelby's". That's what my life is about.....that's what I try to do.

Automotive perfection.....that's my goal.

The "entire" supercharger thing.....venting engines to the atmosphere....removing the cats....just offends me.

Sorry.

It does.

It "detracts" from the 928 "legacy". It reduces the 928 vehicle to a crude "hot rod" that belches oil and fuel everywhere it goes.

One of the "worst" examples of a motor vehicle, on the road.

Gross polluters. Stinky. Dirty. Oil dripping junk.

And I'm sure it will offend anyone looking at these cars, in the future. No future buyer is going to want a car that belches oil on the ground. No one is going to want a car that has all the smog stuff ripped off...no cats, etc.

The day for "hot rods" like this was over in the late 1960's!

To me, the supercharged "thing" is a phase. None of these cars will end up being a "saved" 928....they are just being a really screwed up example of the 928. A final "rape".....while that particular car makes its way to the junk yard.

And that is what hurts me. Turning 928's into junk.

Now if someone comes up with a supercharger system that really works....clean usable horsepower......closed crankcase, runs through catalytic convertors, gets great mileage, and has really low emissions.....

I'm all in!