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While I agree generally with your post above - the new motors, for a variety of reasons, are not as ideally suited for track use as the motors based on the older split case models... PAG's admonition about track tire use, does not mention R-compound tires... they specifically call out the use of slicks as something they'll not accept warranty claims from...
Page 2 of the 2006 CS owner's manual:
The fitting of racing tires (e.g. slicks) for sporting
events is not approved by Porsche. Very high cornering
speeds can be achieved with racing tires.
However, the resulting transverse acceleration
values would jeopardize the adequate supply of oil
to the engine.
Porsche therefore will not accept any warranty or
accept any liability for damage occurring as a result
of non-compliance with this provision.
brad
You are correct, of course. It does not say R compound tires. My mistake.
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Lets all keep in mind that this is also a problem on the 996 and 997. Except the GT3, GT2 and Turbo.
I never had any problem with my car with stock suspension and stock tires.
The Cayman shows the problem more than the others, because the car acheives .25 PLUS more lateral G's than the normal 997.
This is not because the car has a special problem. Its because the handling is too good for the engine pollution control device design.
Yes the factory knows about the oil ingestion problem and so do many dealers. I was warned that this would happen as soon as I lowered the car and installed Hoosiers. So I knew what I was getting into. Maybe I was hoping they were wrong or that my car was 'special'. But having to fix this problem is something I was expecting.
This is not unlike buying a GT3 or RS and having to change all the factory settings and bushings to make it a track car. This is just more of a hassle AND the Cayman is so new that there are NO diffusion of experts that can fix it immediately, like there is on the 997.
In fact, the oil seperator that I installed on the Cayman was recommended by someone that had the same problem on a 997 3.8x51 conversion that had a near perfect setup, and could pull some lateral Gs close to my Cayman. Its a 10min fix on a 997. But a 10 hour fix on a Cayman, because the wiring harness and smog blower have to be moved out of the way.
What does this fix actually do? Prevent the blowing smoke only? It doesn't address the oil starvation issue does it?
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What does this fix actually do? Prevent the blowing smoke only? It doesn't address the oil starvation issue does it?
The thread started about smoke. The 2 chamber oil separator should prevent oil ingestion into the combustion chamber which is causing smoke and has the possibility of causing hydro-lock.
The best fix I know on oil starvation is the sump extension.
The thread started about smoke. The 2 chamber oil separator should prevent oil ingestion into the combustion chamber which is causing smoke and has the possibility of causing hydro-lock.
The best fix I know on oil starvation is the sump extension.
Thanks, glenn!
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The thread started about smoke. The 2 chamber oil separator should prevent oil ingestion into the combustion chamber which is causing smoke and has the possibility of causing hydro-lock.
The best fix I know on oil starvation is the sump extension.
Hi Glenn -
What is hydro-lock? On one turn I get the smoke and the engine bogs down. My CEL would come on. I would check it and would give me a cylinder misfire reading. This only happened after I installed R compound tires and Racing Suspension and was going much faster than when I was stock.
What is hydro-lock? On one turn I get the smoke and the engine bogs down. My CEL would come on. I would check it and would give me a cylinder misfire reading. This only happened after I installed R compound tires and Racing Suspension and was going much faster than when I was stock.
Derek
Wikipedia: "Hydrolock (short for hydraulic lock) is the immobilization of an engine's pistons by a liquid (usually water, hence the prefix "hydro-"). Hydrolocking occurs when liquid fills a cylinder on the intake stroke and, due to the incompressibility of a liquid, makes the compression stroke impossible. This, in turn, prevents the entire engine from turning, and can cause significant engine damage if one attempts to forcibly turn over or start the engine. Typically, connecting rods will be bent, making the engine uneconomical to repair."
Well before engine 'locking' from a large amount of oil, excessive oil in the combustion chamber can cause premature ring failure and piston cracking from the excessive chamber pressures it can create.
I get that same engine bog down and I am positive that it is from excessive oil in the cylinders. Try making that turn in a higher gear. It works for me most of the time.
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Motons; Eibachs; monoball suspension; solid bushings; GT3/Tarret swaybars; GT3 LCAs & trailing arms; Tarret toe links; 997GT3 Calipers & APR rotors; Tubi Exhaust; LW flywheel; Quaife TBD; MotorSport VOS; Heigo roll bar and Lots more. To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
In my opinion Porsche engines of the 986/996 design are not idealy suited for track duty due to the lack of a true dry sump among some other oiling issues.
hmmm, probably there's something I dont understand, but isnt the cayman considered a 987?!
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Anyone on this board experiencing this at Watkins Glen? There's a left hand turn after the carousel at the end of a fast down hill stretch. From what's been posted here on the subject I imagine the smoke issue might occur here. Thanks in advance.
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01 Audi S4
08 Cobalt CS w all the goodies
I'm not quite stock, but I do run PS2s and I sometimes see smoke out of my tailpipe in rapid decel under high revs before a left-hand turn, e.g. Turn 1 at THill and Turn 2 at Laguna Seca. I run at min oil and have the Mantisport sump extension.
I'd love to see a fix for this that doesn't require a day of labor.
And to those that think this is unacceptable in a Porsche, I almost agree. It's very sad, and it kept me from pulling the trigger for awhile, but when you look at alternatives at the same price point, you see that it isn't all that "unacceptable".
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2000 Audi S4 (daily driver)
2005 Volvo V70R (family hauler)
2007 Cayman S (psychotherapy)
I spent an hour at the track today, to test my new GT3 brakes, spherical bushings and my new porsche motorsports oil seperator.
I pushed the car pretty hard. Passed a couple of GT3s. I purposely took some corners in second that I had been taking in 3rd and I go no smoke puffs at all. In the past, taking those corners in 2nd gear caused a lot of smoke and the engine to bog down.
Then after setting for 30 mins, when I restarted the car.... instead of the huge smoke cloud, there was no smoke whatsoever.
I have a PCA DE next weekend, I will see if I have the same experience after 2 days of hard driving.
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Motons; Eibachs; monoball suspension; solid bushings; GT3/Tarret swaybars; GT3 LCAs & trailing arms; Tarret toe links; 997GT3 Calipers & APR rotors; Tubi Exhaust; LW flywheel; Quaife TBD; MotorSport VOS; Heigo roll bar and Lots more. To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
