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Also, according to Krokodil's research on this topic, this MS oil seperator was designed for the 996GT3 Grand Am cars, that were blowing up engines from hydrolock after high-G/high Rev left turns. (I have no idea if true) BUT, this part was developed by Porsche Motorsport for the 996GT3 and for a reason.
Actually my research (a conversation with Vision) indicates that the part was developed/modified for the Grand Am GS Class (Koni Challenge) 996/997 (non-S) based cars with the 3.6L M96.0X engine (similar to the Cayman), and not for the 996 GT3. As we all know the GT3 has a very different engine including the oil system, etc.
I omitted the reference to the 996 3.6L in error, as Vision and I were discussing the same issue still existing with the 997 cars in the Koni Challenge Series where they raced in 2006.
how can they say that GT3 is not a track car ? thats as track specific as 911 goes, well second to the RS, but porsche is been silly denying the purpose GT3 is track use, it might say GT but i doubt you'd Grand tour any place else except a track with that ride.
They can easily say that - These are cars sold for the street and are street legal - that we put them on the track is a choice we make. Note that the GT3-RS street models do not come with a roll bar installed in the US and do not come with 5/6-point harness systems in them either. In the owner's manual for these cars, it carries the same warning about no warranty coverage for track use.
If you want to buy a real Porsche track car, you need to pony-up and buy a 997-based GT3 Cup car or GT3-RSR from Porsche Motorsports.
brad
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21-year PCA Member
PCA DE Instructor
They can easily say that - These are cars sold for the street and are street legal - that we put them on the track is a choice we make. Note that the GT3-RS street models do not come with a roll bar installed in the US and do not come with 5/6-point harness systems in them either. In the owner's manual for these cars, it carries the same warning about no warranty coverage for track use.
If you want to buy a real Porsche track car, you need to pony-up and buy a 997-based GT3 Cup car or GT3-RSR from Porsche Motorsports.
brad
I remember seeing somewhere on this board a member getting a message from Porsche that if he/she wanted to track a car he/she should go buy a GT3, think that's confession enough!!!
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A good car will get you from point A to point B. A great car... will just get you into trouble!
They can easily say that - These are cars sold for the street and are street legal - that we put them on the track is a choice we make. Note that the GT3-RS street models do not come with a roll bar installed in the US and do not come with 5/6-point harness systems in them either. In the owner's manual for these cars, it carries the same warning about no warranty coverage for track use.
If you want to buy a real Porsche track car, you need to pony-up and buy a 997-based GT3 Cup car or GT3-RSR from Porsche Motorsports.
brad
since they are the makers they could claim anything they want, its just their way to evade some responsibility.
don't know why the RS is not considered a track day car in the US, here its sold with a roll cage and a 6 point harnest, and you pretty much have to drive that car naked in the summer or u'd melt, what kind of street car is THAT !?
in the dry-sump lubrication discription and i quote:
"Dry-sump lubrication is race-proven technology that reduces engine operating temperatures and ensures a reliable supply of oil, even when gravity is overpowered by lateral g-forces."
this is the claim porsche makes regarding the current cayman, either they fixed the ingestion problem on recent models or they didn't fully test their claims.
if this still happens on current models, porsche is liable to fix this for everyone
Just as a quick post. You can also change the crankcase breathing for the track cars to a PCV style in which vents to the other side of the throttle body. This would decrease the excessive low pressure draw on the separator in increased G turns.
Just as a quick post. You can also change the crankcase breathing for the track cars to a PCV style in which vents to the other side of the throttle body. This would decrease the excessive low pressure draw on the separator in increased G turns.
Best,
Scott
can someone translate this into layman terminology?
Just as a quick post. You can also change the crankcase breathing for the track cars to a PCV style in which vents to the other side of the throttle body. This would decrease the excessive low pressure draw on the separator in increased G turns.
Best,
Scott
Now, that is an excellent idea!!
To translate: the vent from the crankcase goes to the air-oil separator, and then to the intake manifold (plenum, actually) just downstream of the throttle. When the car is running at high rpm and the throttle is closed, the pistons continue to pump, but with the throttle closed there is no air for them to draw, and the result is vacuum in the intake manifold. This vacuum tends to suck oil out of the crankcase and into the manifold, leading to the oil smoke when it is burned in the cylinders. Scott's suggestion is to relocate the hose from the air-oil separator to a point upstream of the throttle. Then when the throttle is closed at high rpm the manifold vacuum will not suck out oil, since the hose is on the atmospheric side of the throttle.
Plenum
The plenum is the piece that goes between the Cayman throttle body and the intake runners. The factory piece is a long black plastic tube with a divider down the middle. There are aftermarket replacements which are designed to allow the air to flow easier/faster into the engine and increase horsepower and torque.
Sounds like a plenum/throttle body modification is in order...
Plenum
The plenum is the piece that goes between the Cayman throttle body and the intake runners. The factory piece is a long black plastic tube with a divider down the middle. There are aftermarket replacements which are designed to allow the air to flow easier/faster into the engine and increase horsepower and torque.
Sounds like a plenum/throttle body modification is in order...
It would be easy to plug the existing tube on the plenum where the hose clamps. Then a new tube that would serve as an attachment for the air-oil separator hose could be installed on the silicone hose that connects the throttle body to the MAF sensor. I don't see where it could be installed on the throttle body itself - not enough room.
The problem with this is that the silicone hose runs downhill to the MAF sensor - I can envision an oily mess accumulating there over time.
Plenum
The plenum is the piece that goes between the Cayman throttle body and the intake runners. The factory piece is a long black plastic tube with a divider down the middle. There are aftermarket replacements which are designed to allow the air to flow easier/faster into the engine and increase horsepower and torque.
