AOS Modified to a Catch Can Arangement

[catmanluge]

I made a catch can type set up with my AOS system trying to stop oil from entering the intake manifold. I blocked the intake hole with siliconed "Cap" that fit tightly over the intake. Then attached a catch bottle on the side of the frame behind the engine bay. From the AOS I placed a tube that fits into the catch bottle and vented the top of the bottle so that air can escape but not oil. I am hoping that this will stop my oil blow out on hard left and right hand turns at the track..

Has anyone else tried this? :renntech:

[ericinboca]

I made a catch can type set up with my AOS system trying to stop oil from entering the intake manifold. I blocked the intake hole with siliconed "Cap" that fit tightly over the intake. Then attached a catch bottle on the side of the frame behind the engine bay. From the AOS I placed a tube that fits into the catch bottle and vented the top of the bottle so that air can escape but not oil. I am hoping that this will stop my oil blow out on hard left and right hand turns at the track..

Has anyone else tried this? :renntech:

Can you post a picture?

I was trying to help a guy locally that had the same issue. We were going to install a Porsche Motorsports AOS, which is what I did on my 2004, and that solved the problem on my car.

But when I got into the engine bay, I realized his year car did not have the same configuration. At some point, it looks like Porsche changed how the AOS is mounted - on my car, it is mounted on the bottom, with the bolts through the base. On my friend's older model, it is mounted with bolts through the side, so the motorsports AOS wouldn't fit. Not sure what model year was the first to change.

We have been thinking about going the catch can route.

So you left the AOS in place with the hose still going to cylinder 4, but disconnected where it goes into the throttle body and routed that to a catch can?

We were not sure what effect a catch can would have on the vacuum, and where thinking about a sealed can and still have a connection to the throttle body, but configured so the oil is trapped.

Really interested in what you've done.

[txhokie4life]

I made a catch can type set up with my AOS system trying to stop oil from entering the intake manifold. I blocked the intake hole with siliconed "Cap" that fit tightly over the intake. Then attached a catch bottle on the side of the frame behind the engine bay. From the AOS I placed a tube that fits into the catch bottle and vented the top of the bottle so that air can escape but not oil. I am hoping that this will stop my oil blow out on hard left and right hand turns at the track..

Has anyone else tried this? :renntech:

Can you post a picture?

I was trying to help a guy locally that had the same issue. We were going to install a Porsche Motorsports AOS, which is what I did on my 2004, and that solved the problem on my car.

But when I got into the engine bay, I realized his year car did not have the same configuration. At some point, it looks like Porsche changed how the AOS is mounted - on my car, it is mounted on the bottom, with the bolts through the base. On my friend's older model, it is mounted with bolts through the side, so the motorsports AOS wouldn't fit. Not sure what model year was the first to change.

We have been thinking about going the catch can route.

So you left the AOS in place with the hose still going to cylinder 4, but disconnected where it goes into the throttle body and routed that to a catch can?

We were not sure what effect a catch can would have on the vacuum, and where thinking about a sealed can and still have a connection to the throttle body, but configured so the oil is trapped.

Really interested in what you've done.

What is the "state" of the oil returning back to the throttle body?

could a catch can in series that was physically lower than the throttle body. Say it entered at the catch can at bottom, and came out the top.

therefor gravity would help capture, yet all vacuums etc would work, as well as it would start smoking again

when the catch can was "full".

m

[catmanluge]

I just spent three days at Watkins Glen I had to empty the catch can four times. I think I will put some sort of drain tube in the bottom of the catch can so it can be emptied easily. I used a vacumn pump with plastic tubes to empty the can through a 3/8 inch hole on the top of the catch can. On the top of the catch can I drilled a 3/8 hole as a breather it has a 3/4 inch opening on the top which I placed a 3/4 inch plastic tube that was extened from a Porsche plastic tube that is connected to the top of the AOS. I blocked the intake manifold vacumn with no leak experianced.

The catch can was tie wraped on to the shifting cables at the rear of the engine. I have to make a more solid mounting bracket.

There is no oil in the catch can with normal driving but with high revs and lots of g force turns it does fill up. I could run abouth 1.5 hours.

No Blue smoke!!!! :renntech:

I made a catch can type set up with my AOS system trying to stop oil from entering the intake manifold. I blocked the intake hole with siliconed "Cap" that fit tightly over the intake. Then attached a catch bottle on the side of the frame behind the engine bay. From the AOS I placed a tube that fits into the catch bottle and vented the top of the bottle so that air can escape but not oil. I am hoping that this will stop my oil blow out on hard left and right hand turns at the track..

Has anyone else tried this? :renntech:

Can you post a picture?

I was trying to help a guy locally that had the same issue. We were going to install a Porsche Motorsports AOS, which is what I did on my 2004, and that solved the problem on my car.

But when I got into the engine bay, I realized his year car did not have the same configuration. At some point, it looks like Porsche changed how the AOS is mounted - on my car, it is mounted on the bottom, with the bolts through the base. On my friend's older model, it is mounted with bolts through the side, so the motorsports AOS wouldn't fit. Not sure what model year was the first to change.

We have been thinking about going the catch can route.

So you left the AOS in place with the hose still going to cylinder 4, but disconnected where it goes into the throttle body and routed that to a catch can?

We were not sure what effect a catch can would have on the vacuum, and where thinking about a sealed can and still have a connection to the throttle body, but configured so the oil is trapped.

Really interested in what you've done.

What is the "state" of the oil returning back to the throttle body?

could a catch can in series that was physically lower than the throttle body. Say it entered at the catch can at bottom, and came out the top.

therefor gravity would help capture, yet all vacuums etc would work, as well as it would start smoking again

when the catch can was "full".

m