Just got new turbo's last month at EVOMS. I am selling my original turbo's from my 2005 CTT. They have 136,000 miles on them. The right passenger side turbo is perfect. The left side driver turbo began leaking oil--enough to result in insufficient cat error function messages, but it had not started burning oil--yet.

These are in boxes ready for shipping.

One could easily made a profit rebuilding and selling these. There is only one source for them. That's right, the stealership! And they retail for about $2,300 EACH!

You may be saddened to learn that your twin turbo's only last 135,000-150,000 miles then need to be replaced. One also gets to replace expensive primary catalytic converters should they fail!

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Well one thing I took from this post is Man these Cayenne's were built well vs. other luxury vehicles you dont hear things like this lasting that long. Question what did the EVOMS turbos cost vs the factory?

 

EVOMS did the labor; I supplied the parts courtesy of my PCA Chapter President.

THERE ARE NO OTHER TURBOS AVAILABLE FOR THE CTT.

It is a 40 hour job. The engine must be dropped. The front suspension removed. The car comes apart in Large Pieces.

Car is running smooth and fast. I was happy with the way it was running before but after the job it is clear she was running ragged.

 

Awesome Conrats man

 

Thank you.

While I'd love to get rebuild kits and get these ready for next Turbo job in about 135,000-150,000 miles, I just don't need the extra weight even though I am confident I will have this car for 365,000 or so more miles.

I am asking bidding start at $300 each.

Those of you will more than 120,000 miles ought to start preparing for the day when you'll have to do the job.

 

There are at least a couple examples of Cayennes out there with 200k+ miles and no major issues, including turbos. I know you're trying to make the sale but no sense getting others worked up over what may be an isolated incident.

 

I am not trying to work up anybody nor am I trying to con anybody. What makes you an expert? I trust EVOMS expertise and EVOMS observes that that is the expected lifespan for the turbos.

 

Yet the forums don't show the same experience. I would imagine that the forums (rennlist, 6speed, Renntech, pelican, planet9) would show at least one sign of this being true as they have far more traffic than Evoms.

 

I drive far more than most Cayenne owners. If you want to challenge EVOMS credibility take it to them. I have more miles than the average Cayenne owner. Indeed, I don't see any mention of the turbo's wearing out anywhere but most Cayenne Turbo's don't have as many miles as mine has.

One thing for sure, there is only one source for these turbo's and I see that most 911 Turbo's have to be rebuilt at expected intervals--actually far sooner than these.

The average stock Cayenne Turbo of this age and mileage runs weak. Mine certainly did before she was modded; even in its weakened state it was still a better performer than your average car. You might not notice it but few hold their boost more than a few seconds IF they still reach .8 bar. The diverter valves wear out and I certainly wished the turbo's didn't wear out but they do.

The car is so much faster and significantly smoother that I can't keep my foot out of the throttle--she's just that much more responsive and much more of a joy to drive. My MPG has been terrible wasteful but lots of fun.

Before the turbo's were replaced I was chasing down 911 Turbo's at the track. I can't wait to see how much more she puts out at the PCA DE this weekend. My fear is I might get into even more trouble with the extra smooth power on tap.

As far as your turbo's go, we shall have to wait and see. It doesn't surprise me that mine is the first mentioned on the forum. EVOMS and a few dealers have done these. FYI, the driver's side left turbo seems to be the one that goes bad first.

While the dealer will insist he has to drop the engine, that left driver's can side turbo can be replaced without dropping the engine but the right side is another issue. EVOMS says there is no way to replace the right side passenger turbo without dropping the engine and suspension subframe.

Believe me, this was one job I wish I could have pa$$ed on.

Better save your money; better to be prepared IF you want to keep your car. EVOMS said most people get out of the cars before this or at this point. If I had sold mine, it would take two years before the new owner noticed a problem. But, I am not doing that to anyone and I really like my car and want to stay in it as long as possible.

 

BTW, I have seen one recall for cracked turbine wheels that resulted in burning oil with a potential for fire hazard but mine was not burning oil--just passing enough to effect the primary cat.

 

Perhaps mine has had problems for a while but the dealer never caught it. It used to dump a lot of crap out if I hadn't been on it for a while driving sedately in Anchorage in the winter. I would hit the gas and watch the mirage out the rear window obscure my vision and that of others. That is not happening now.

So, I just don't know how isolated this is. EVOMS says all the turbo's wear out at about this mileage.

 

I'm sure that turbos do wear. Just how much over the life of the car is the question.

I've seen several owners with 250k miles Cayennes from cruising the various forums, and many in the high 150k+ range. Just haven't seen mention of turbo issues.

There have been a few discussions about putting BIGGER turbos on and a few potential sources for them.

Now, if you want to see a car that needs turbos relaced. Go look at any 2.7t Audi. Same twin turbo, have to drop the engine to replace set up as the Cayenne, but they have to be changed everytime you put fuel in the car

 

This is just patently untrue. I have driven many 955 CTTs and all of them held boost and pulled hard.

There is no reason why any well maintained stock (and never modified) 955 CTT (Germany included, 02-06) should run weak. And from my experience, I have yet to run into one that does.

I have one of the first 955 CTTs that landed in America and can tell you that it pulls as hard as any 06' I have driven, and there is no reason it shouldn't.

This has nothing to do with the car running weak. In lower gear, the car simply cannot hold boost for long because engine RPM rises quickly. As you shift gears you will notice boost pressure rises and falls, this is totally normal.

You're not going sustain .8 bar in lower gear due to engine RPM and shift points (automatic or Tiptronic). You will hit and sustain .8 bar in high gear however because of the time it takes the engine to climb to redline due to the higher gearing.

Further, if you're at .8 bar for more than a few seconds, you will be in high gear and hauling ***. Most people won't be sustaining .8 bar for more than a few seconds to begin with. This isn't a limitation of the car as much as a limitation of the driver. Now, go hit the track and drive any given "weak" 955 CTT to 165 MPH and then come back and tell me how long you sustain .8 bar.

PS,

I have found that Diverter Valves typically go bad when boot pressure is raised above stock (ECU flash for instance). When the valves do leak, unless you're honking, it's typically not significant enough to loose any noticable power.

I would say the usual suspects (vacuum lines, clogged injectors, fouled plugs, hot days heat soaking your ICs, etc) are more reason for reduced power than diverter valves on a stock car. If you think about it, there isn't too much that should cause a 955 CTT not to perform well.

 

have the turbos been sold? let pm on the asking price. I'm interested.

 

Sorry I couldn't respond sooner but I have been on the road.

Call Robert Boreham at EVOMS at 480-317-9911

He has them.

Thanks