We took our 06 C2S cab to the Pikes Peak International Raceway track last weekend for my wife to drive in several PDX events. While we were there, we were fortunate to be introduced to a professional race driver. I asked him to take the Porsche around the track to show me what it was really capable of in trained hands. It was amazing, he ran several of the fastest laps of the day for the track even though there were many other purpose built race cars there.

After his run we parked the car, had lunch, and after about a 2 hour down period my wife started it up to run her event. We got a big puff of blue smoke out of each side of the exhaust. The car has 21K miles on it and has never smoked or used oil before now. It only puffed on start up and ran clean through the balance of her PDX run. It was then parked for the night. The next morning, an even bigger puff of blue smoke on start up that cleared right up. She ran several more easy PDX events through out the day and it didn't smoke any more upon start up, while running, etc. It's now been almost a week since then, still no smoke and we drive it every day.

Any ideas what could have caused this? At first I thought we may have hurt the motor, but I watched the gauges through the entire run and he always shifted just before 7K, never down shifted in a way that caused over revs, and the water temp never went above 175. The motor runs fine and sounds the same.

Is it possible that due to the extreme G forces he was causing, that oil got sloshed somewhere it normally doesn't go and eventually just burned off since we weren't driving any where near as hard?

 

Air oil seperator going bad maybe?

 

You can find lots of posts about smoke on startup. Very typical of the boxer engine, happens in the Suburus too.

 

after you ran car very hot - let it run on idle a bit to cool down before shutting it.
puffs of smoke for 3-5 sec are ok. puffing smoke for several minutes or puffing smoke while running on a track is not ok.

 

Just a thought: The banking on PPIR is significant and in the hands of a capable driver, you probably had oil "sloshing around" (that's a technical term) in unusual places or in unusual quantities due to high g-loads. It's probably nothing to worry about since the problem seems to be transitory. The smoke was probably some residual oil that needed to be burned off. But, monitor the situation for awhile and if symptoms get worse get it in to someone qualified to check it out. It would be unusual for a 911 to have oil starvation problems but anything is possible. Sounds like you had a good time! We're you on the "Roval" or beating feet strictly on the banking? Best,

 

Thats what I'm thinking too. I'll monitor oil consumption and watch it closely next time at the track.

They had it set up in the ROVAL configuration, which is a lot of fun. You get the high speed banked oval down the back straight and through turns 1 & 2, then into the road course. It sure is hard on right front tires though.

 

My 2011 4s did that a couple of weeks ago on start up with 4000 miles on it .
Has not done it since .
Not worried here .

 

Seen this before.