Wolfmaniser

I flipped through a book about the Cayenne at a store the other
day, and noticed that a picture of it's engine looks very similar to
the 928's with the one exception:
TIMING CHAIN!
Now, accuse me of being a dreamer here, but what's the likelihood
of the two sharing some parts, like maybe the timing chain? I for one
wouldn't mind losing 5 or so horsepower for a truly- pardon my
muscle car talk- "bulletproof" engine.

Lizard928

that is a very valid question, your best bet would be to get the engine manual and see what is run off the timing chain on the caynnene as on our cars we also have the water pump as well which you don't want to run off a chain, however you could make a plate to olt in place and run an inline electric water pump instead, that would be great if someone were to actually attempt this

Susan K Thomas

The Cayenne is a completely different engine, it is a much narrower "V" than the 928's wide 90 degree V...not certain but I think it might be about 60 degree V. It does have an eight counterweight crank and a "girdled" block like the 928. There is a separate serpentine belt driving the water pump, alternator, power steering, compressor, etc. and a separate chain driving the oil pump.

Except for some nuts & bolts, doesn't look like there would be any shared parts at all...but after having a weekend test drive in one it sure would be nice to put one of those engines in a 928!

Susan Thomas
DEVEK

atb

Susan,

So has the Porsche Dealer noticed the big reds on the Cayenne yet? I must say, the White Car looks good with yellow calipers. <LOL>

I still don't know how Marc resisted the urge to totally dismantle/reassemble the Cayenne motor and drivetrain. Then again, if DEVEK comes out with an AWD kit for the 928 in the upcoming months, we'll know what Marc did on Friday night before DEVEK days since he didn't have to rescue any stranded sharks.

Susan K Thomas

if you only knew how tempted we were...let's just say it did have all four wheels off the ground once, and not on the fun drive if you know what I mean

It's a good thing that we were just too darn busy with DEVEK Days otherwise that Cayenne would have been in big trouble

We commented on Tuesday morning after the event how great it was that we did not have to do any rescues this year, and then the phone rang...someone on their way home to LA only made it as far as Gilroy! With Marc's help and the assistance of a local shop down there, the owner was back on the road pretty quickly.

Have a nice evening all,
Susan

T_MaX

How about the fuel injection system?

atb

Dual MAF's, that would be nice. Right at the front of the engine bay too.

Jay Wellwood

Not to mention the VarioCam and VarioRam induction systems.

Cobey

Why not swap it with the new Cayenne 6cyl engine?

T_MaX

Maybe the turbo model

I'd be happy to convert the induction and injection system off the V8 N/A model.

Vario cam? Well, one thing at a time

Flint

That's not compromising, is it? Nah!

bcdavis

Why not put a 996 engine in there then?

Blah!

The 928 deserves a V8!

Jim bailey - 928 International

It would be very unusual for it to be something other than a 90 degree V 8.. the timing of the explosions with anything other than 90 degrees makes a very rough feeling V-8 engine . The V-6 works smoothly at 60 degrees but not at 90 unless you stager the rods with a very convoluted crankshaft (GM evenfire v-6). I am still not convinced that it is a " Porsche " engine . The fact that the 928 engine can be bored and stroked to 6.5 liters is proof that the original engine design was larger than it needed to be . The Cayenne is a more compact design .

mark kibort

Gut it , lower it, bolt on that devek suspension , and get it on the track!!
mk

Normy

I certainly don't know this for sure, but I'd bet that the Cayenne V8 is indeed a Porsche design. This is a 90 degree engine, just like the M28 unit. The only "narrow angle" V8 that I've ever heard of was the 3.4 liter V8 in the last Fort Taurus SHO, which was 60 degrees for packaging purposes in a transverse mounting.

The Cayenne engine is very oversquare- which means that the bore is much bigger than the stroke. The other version of this car, the VW Touareg, also has a V8 option- a version of the Audi V8.

The Audi V8 is a modular engine largely based upon the VW Golf four cylinder unit. This V8 is very undersquare- its bore is relatively narrow for its stroke, something that VW desired in their four cylinder engines for greater torque. If you examine the difference in bore, you quickly realize that it is unlikely that the two engines have the same bore spaceing and thus are not related. I doubt Porsche would rob the parts bins of any other manufacturer than the VAG group.

At least that's what I think-

N!