Nicole

Not sure what your problem is. You don't have to drive a car to know something about it - sometimes documentation is enough. It is pretty clear and obvious that the Cayenne engine is not a modernized 928 engine. If it was, we'd all go crazy about replacing the timing belt with the Cayenne's chain setup...


Normy is right in that the Cayenne engine is neither based on the 928, nor on the Audi V8. It's an all new design by Porsche, made in a special area at the Motorenwerk in Stuttgart-Zuffenhausen.

DoubleNutz

No disagreement there and I already knew that (about Porsche designing the engine any thoughts to the contrary is positively absurd). However, my concern was that Susan observed the engine at did not think it to be a 90degree V8 (she later stood corrected on that). "My problem is"- we often speculate on something after only a magazine read or seen a Motor week television program about and all of a sudden...We're have expert OPINIONS to contribute here!

I am taking joy in reading this as my wife and I have been considering the purchase of a Cayenne to replace her 330i Bimmer (which is a crap car). Been to the Porsche dealership twice and looked at one -at least. I've read the same books and watched the same programs- still does not make me an expert and I am not going to tear down the credibility of someone who looks and works with this kind of stuff EVERYDAY. Susan could have told me it was an opposed engine config and I would believe her because she actually looked at the thing, in addition to the fact that her credibility (to me) is superb- as is Jim Bailey's. Until someone chimed in with a "no Susan I looked at it too and it is definately a 90degree V" - I don't go for this "well I a haven't looked at it but I THINK or I HEARD or l READ". That is crap and that is my problem.

Drewster67

Consequently, Porsche engineers went to great lengths to keep the powerful Cayenne V8 engine as trim and light as possible. Both the block and two-piece cylinder heads are crafted of lightweight aluminum alloy.

The Cayenne V8 uses a 'closed-deck' design in which the aluminium crankcase is separated from the cylinder heads. The cylinder block and its as-
sociated coolant channels thus form a fully closed system. This elegant solution not only makes the engine that much lighter, it also improves its tight-
ness and strength.

The lower section of the crankcase is made of lightweight aluminium with cast-iron bearing brackets. This proven technology helps minimize bearing play caused by changes in engine tem-
perature. This in turn reduces mechanical noise and eliminates the need for heavy and extensive soundproofing.

With less bearing play, there's also less oil to move, which means the oil pump can be smaller and lighter.

In order to cope with the extreme temperatures and forces generated during combustion, the Cayenne Turbo is equipped with high-tech alloy heads featuring the same race-proven technology as the 911 Turbo. Forged aluminium pistons help minimize weight for a morefree-revving engine response.

The result is a compact, lightweight and highly durable engine platform offering everything you'd expect from a Porsche - including the distinctive Porsche sound.

The twin exhaust turbochargers on the new Cayenne Turbo are arranged for optimum use of space. The low-volume intake pipes combine with short exhaust manifolds to enhance the immediacy of response.

Incoming air is compressed by each turbo and then passed through an intercooler system where the heat generated during compression is reduced. Since cooler air is more dense than warm air at the same pressure, the volumetric efficiency of the en-
gine and the car's overall performance is improved. The cooler intake mixture also helps to lower en-
gine temperatures, thereby minimizing component wear.

About the Turbos

Boost pressure is controlled by the engine management system, reaching 1.6 bar (absolute) under full acceleration from just 2,250 rpm. If driven moderately and consistently in part-throttle mode, the boost pressure setting is optimized for maximum fuel economy. Driven more asserti-
vely, the turbines are 'pre-spun' to increase the amount of pressure on tap. When the throttle is fully opened, the boost can be applied immedia-
tely, thus eliminating the problem of turbo lag.

Both turbocharger units are cooled by dedicated circuits from the main engine cooling system. This highly effective solution helps prevent oil degradation, a problem typically encountered at higher operating temperatures.

For the driver, the system offers seamless delivery for a more fluent and manageable drive.

About the cooling system

In the Cayenne V8, we've used a special coolant management system offering more effective control of operating temperatures throughout every part of the engine.

While 20% of coolant is supplied to the crankcase, the remaining 80% cools the cylinder heads using proven cross-flow technology. The engine is thus maintained at optimum operating temperature, enabling reduced component clearances and therefore minimum wear.

About the Cams

One of the key features of the new Cayenne engine is VarioCam variable valve technology. Specially developed and patented by Porsche, the system uses camshaft adjustment based on engine speed to enhance the performance of the car.

Operating under the direct control of the Motronic engine management system, VarioCam uses a rotary-vane actuator on each bank of cylinders to continuously adjust the phase angle of the intake camshaft - and thus intake valve timing.

The result is a surprisingly simple and highly effec- tive means of improving power and torque, while at the same time reducing fuel consumption.

At lower engine speeds, timing is adjusted to help maximize available torque. At the upper end of the rev range, VarioCam enhances combustion to achieve maximum power output.

Another important feature of the VarioCam system is hydraulic valve adjustment. Apart from reducing engine noise, this valuable technology helps mini-
mize emissions during warm-up. Best of all, there's no need for regular valve adjustment.


http://www3.us.porsche.com/english/u...bo/default.htm

Nicole

Apart from seeing all those pictures in magazines, brochures, the Porsche Cayenne video, etc. I have actually looked at the engine a few times when the hood was popped open. Does that qualify me? If not, I'll send my resume to DEVEK tomorrow...

DoubleNutz

OH Boy...how did we get here...ok whatever...you win.


I suspect I should give you all the same respect I give Susan because you have never opened a shop dedicated exclusively to building and racing performance 928 engines. There's allot of credibility that comes with Susan and Mark's work and contributions here...I respect that ... it is up to them if they feel the same way about your resume and then someday Iwill render the same to you provided it is backed with something similar to what they have done sucessfully for years.

Nicole

No, I'm not saying I have the same qualifications as Marc and Susan! Not even close! Just enough to tell the basics of what kind of engine I'm looking at. I was - of course - kidding about sending them my resume, even though it would include two years of auto parts sales experience.

My thought was more along the lines of "if working at DEVEK is what it takes to get credibility about rather basic stuff, maybe I should send them my resume and get that credibility by association". Again, I was kidding!!!

And I never meant to discredit Susan in any way. She is THE woman!!!

I know what I know, and I don't BS around. If you follow my past posts, you know that when I comment about something, I have pretty good background information. If I'm speculating or not sure, I will say so. If I have to look it up to be more specific, I will say so, and get back when I found the info.

I grew up in the "old world", where you don't seem to get away easily with making things up. Or maybe I just lack the qualification of being a good lyer. So I don't even try.

DoubleNutz

OK I am gonna let my guard down...

Actually I have followed many of your posts here and elsewhere on the Rennlist (even your numerous posts on the recent Subject of- $4.00 per gallon...)

I actually have lots of respect for the intellectual prowess you display here.

Sooner or later you and I were gonna disagree or potentially lock swords on some topic. Funny thing is my sword is made of rubber and yours Chrome vanadium steel!

Cobey

Hey now, you told me that was a rubber CHICKEN...

Nicole

Don't worry, Pat: I'm not armed...

The only weapon I have is what I know and the way I think. And I like to make others think as well. Sometimes it takes a different perspective to realize that some (new) thinking is necessary. And I acknowledge that this is not always an easy thing to swallow.

I did an online IQ test the other day (http://www.emode.com/tests/uiq), and it said that I was a "Visionary Philosopher". Supposedly that means I "have a powerful mix of skills and insight that can be applied in a variety of different ways. "

Pretty scary, huh? Stay tuned...

Jack '84 928s

I think that if a chevy motor can be put in a 928 somehow a cayenne v8 can be put in there one way or another..... Ill drive with no hood. lol

DoubleNutz

Took that test and got this result-

The Original IQ Test

Congratulations, Pat!
Your IQ score is ...(I will keep that part secret )

We also compared your answers with others who have taken the test, and according to the sorts of questions you got correct, we can tell your Intellectual Type is a Facts Curator.

This means you are highly intelligent and have picked up an impressive and unique collection of facts and figures over the years. You've got a remarkable vocabulary and exceptional math skills — which puts you in the same class as brainiacs like Bill Gates. And that's just some of what we know about you from your test results.


Facts Curator huh? You the visionary and me the facts curator...ok I know how that adds up!

Nicole

That's hillareous!

Flint

Don't worry, I wasn't by any margin serious!

I follow the automotive industry very closely. The fact that VW is owned in majority by the German state of Wiesbaden(sp?) means bad news if Germany goes ahead with some changes in corporate ownership laws (if anybody can explain it better, go ahead). It is also apparent that the American (by American, I mean, American-owned) companies may find themselves having to sell off parts of their companies if they cannot manage their parts better (Ford PAG, Jaguar in particular, comes to mind). GM has other problems when it comes to Fiat, and the stories so far go that Fiat plans to sell off Ferrari/Maserati before GM can take full ownership (VW has been named, but with that Wiesbaden(sp?) thing...) Possibly if any safe bet is to be made, its with Honda/Renault (at least as far as management is concerned at the moment)

Though, obviously, the stock market means different things to different people at different times.

Thom

For those who fancy some pictures of the engine :

Nicole

Thank god!

Hmmm... Last time I looked, Wiesbaden was a town near Frankfurt, and VW was far away in Wolfsburg, in the State of Lower Saxony. Yes, there is an issue with the European community because of a specific "VW Law" that has to do with the ownership of only this particular company. I am not up to speed on this issue, so I won't comment further.

I've been wondering, who could be a potential buyer of Ferrari and Maserati. VW has gobbeld up so many brands in recent years, they would probably not want or need them. And since they are profitable, they might just go to an investor group - who knows. Well, I think watching the automotive economy is more thrilling than any Formula 1 race these days...