Carl Fausett

I am ready to announce our new and improved 16v oil control system for the 928, having now succesfully installed and tested in on L-Jet Supercharged cars and K-Jet supercharged cars.

You may be aware of the Devek idea for a baffle plate beneath the oil breather housing, and you may have been also seen the oil-return-drop concept on a number of cars - we have been manufacturing and selling those as kits for a while. Both of these ideas are good, and have some positive effect.

But we needed more. I have stroker guys who call with oil mist in their crankcase vapor, supercharger guys too, and sometimes just guys who like to shift at redline a lot.

What we have done (see pictures below) is re-engineer the factory oil separator to implament a 3-chamber design to do a better job of condesning the oil vapor out of the crankcase venting and return it to the oil pan. Those of you that are pilots of small aircraft may recognise a similarity to the popular M20 air/oil separator found there, and that analogy is a good one.

So, we are now providing all 3 techniques in a single kit with comprehensive instructions.

Price now is $145 where it was $85 due to the added parts and machining. Any of our customers with the original system, from us are welcomed to upgrade to this new version for just the difference in price.

There are 6 pictures about it and a more detailed description here:
http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMESE%3AIT

Your questions are welcome.

Bill Ball

Carl:

Nice work! Love the cut-open view. Very instructive. I must compliment you on the thoroughness and quality of your photo-documentation (as well as the product), as seen in your SC kit manuals and again here. You set a high standard.

Tony

The one i made for my car is very similar and is based on a seperator used on reciprocating aircraft engines. It works very well as im sure youve found out also Carl!

Air/oil mixture comes in...is forced to make a few 90' turns and eventually the oil drops out of suspension and to the bottom where it can go to a catch can..engine..or the ground



This link was the seed for my application. I wasnt about to pay FAA/PMA prices!!
http://www.m-20turbos.com/breather.htm

Carl Fausett

Thanks Bill. We do try to be comprehensive. You know, I ran that post thru the spellchecker before I submitted it - but you sure cannot tell. Sorry for all the spelling errors.

Tony - I was looking at the M20 air/oil separator for the 6 cyl Cessna Lycoming when I came into this idea. The task was to get it down to where it fits completely within the Porsche oil separator canister so it looks stock. Yours is huge! Where does it go?

SharkSkin

Carl, can you help me out a little here.... I don't see how the air/oilmist gets past the outer cylinder, except via the drain groove at the right side of the cutaway pic. Are there holes or slots in this piece that are not shown?

Carl Fausett

Sharkskin - the outer tube is sized to fit exactly between the top when screwed down and the bottom of the oil separator. However, take off your oil fill cap and remove the basket and you'll see that the bottom FALLS AWAY on one side.

We take advantage of that topography - the oil/air mist must travel around the outer perimeter and down under the outer rim on that side. The air will make a 180 degree turn to come up the inner tube, but the oil is too heavy and inertia will keep it going straight down and back into the motor.

It works really well.

Rez

Carl.

You're the man. So much for the 928 comes from you.

Thank you.

Carl Fausett

Thanks, Rez. There are so many talanted 928 owners - each with skills to bring to bear on any particular problem we might have - I do not imagine there isn't much we cant do when we share knowledge in a forum such as this.

SharkSkin

Thanks Carl, that looks awesome. What do you do with the water line that runs through the factory breather? Does it integrate with your setup, or does it get capped or re-routed?

FlyingDog

Would the LH fuel lines get in the way of that?

UKKid35

Looks superb, its always great to see development work, especially when consideration is given to stock appearance.

Please can you say whether the S4 suffers more or less in this regard, especially the early models with the oil jet piston coolers. Are you considering designing something for 32V cars?

Airflite40

Sharkskin: I am curious as to which water line you are referring to? Do you have a pic?

Carl Fausett

The water line is designed to keep the oil vapor from congeling in the breather hose to the air filter so it does not turn to sludge and stop moving.

Our kit provides a metal hose splice, you simply remove the water line from each end of that breather hose and connect them to each other with the splice provided.

Here are 2 of the pics from our installation instructions:

GlenL

Carl,

How about just the part that goes inside the filler?

Carl Fausett

UKKid35 - The 32v cars also have issues with pressurizing the crankcase when they are stroked or supercharged. Ask Tony and Tim. They each have worked on ventilating the crankcase in different ways.

IMHO, it seems like it is less of a problem than the 16v cars, but it's still a problem.

Consider there are two methods: CVA (crankcase ventilation to atmosphere) and PCV (positive crankcase ventilation). If your upper engine is nice and tight, a CVA system might be enough. CVA systems achieve atmospheric pressure at rest, and about .5 bar at throttle if designed correctly.

The racers like a PCV system, because they learned in the 1950's that if they pulled a vacuum in the crankcase, the piston rings sealed better and they gained HP at the crank.

PCV systems inlcude intake-vacuum-drawdown and well as belt-driven vacuum pumps. It's when you are evacuating the crankcase with intake vacuum that it becomes so impoirtant to remove the oil vapor from the air before it gets into the intake manifold - oil in the intake air lowers the octane rating a lot and contributes to detonation.

That is why we concentrate so much on improving the oil separator.