Larry928GTS

For less time, trouble, and money than just that Cayenne engine swap would end up taking, he could buy a newer 928, and boost it to get more horsepower out of the engine in it than what the Cayenne engine has. He wouldn't have to hack up the car to do it either.

hacker-pschorr

Knock it off already. I'm still putting a 16V 928 engine into my next replica Cobra.
How many people told me 9psi on a stock 16V would greande the motor first time out due to the weak pistons & bad head design? Or how many told me L-Jet would never fuel past 6psi?

I just listen to a few voices in my head that show up at Tim's house every now and then.

SwayBar

I think anyone and everyone would care at the thought of sinking $30k+ into a car which sells for 3 to 5 g's. Making blanket statements otherwise sounds very silly.

IcemanG17

Okay.....everyone says the Cayenne V8 is too tall to fit in a 928.....so get a bigger hood.....no biggie...however it would not be very cost effective to do it...those motors are big $$$ + all the computers to run it....your better off building a custom 928 stroker or a S/C....

It would be super cool though....it also looks like a closed deck design so it should hold some serious boost better than a 928 motor....I wonder what the bore spacing is of the cayenne V8.....probably not close to the 122mm of the 928 motor...so it can't be built as large displacement as a 928 motor....probably closer to the 113mm of a standard chebbyV8

hacker-pschorr

Silly or not, it's the truth. Many people do not take into consideration the value of the vehicle to acheive the car they want, it's 100% irrelevant in their decision making. "We" do not make these decisions because they make sense or because it's economical, we do it because we want to.

Ever see a 951 with a $40,000 four cylinder engine? I have, it wasn't a track car either.

Almost every race car fits this description. I fail to see why some people think this mentality is A-Ok with race cars, but ridiculous on a street car. Ever see a $15,000 paint job on a $5,000 car?

Our group doesn't blink an eye over a $20,000 stroker engine. So I fail to see why this is such a stretch for a new technology, factory built V8 Porsche motor into a classic 928.

No different than dropping a $20,000 Roush motor into a mustang that isn't worth more than a 928. There isn't a Mustang guy on the planet who would think that was a silly idea.


If we were all rational about our cars, we wouldn't drive Porsches in the first place:
http://www.youtube.com/watch?v=4exPauh5X_w
I still get chills watching this

DK

No - 20K on a stroker motor will bat a lot of eyes. Come on - the majority of new 928 owners paid half of that for the whole car. There are only a very small number of stroker motors outside of race cars. There is no template - there are lots of differences between specs of cranks, pistons, and rods. A stroker motor is going to take a long time - YOU have to spec it.

Street cars are a lot easier than race cars because there is no need to fit to class (displacement). The modern motor may be attractive, but serious wiring and fabricating to make it work. If you can - all the power and blessing to ya! Someone is going to do it - you could be the first!

Path of simplicity would be to blow some cold air in that early motor. The lower CR will be OK, but will need some kind of aftermarket ignition and A/F. Do that first, and then see if you want to step up to the cayenne or x motor. Make 360+HP with the existing motor and I predict you won't bother with the hassle.

It takes serious commitment and time to build a stroker or custom 928 motor, but there are some very easy (almost) bolt-on blower applications that will really bring the street car to life.
What is the worst thing that could happen? Call Mark A and ask how much for a complete '79 motor (... with around 8:1 CR...). I think he just got 745 of them from PCNA atlanta...

jon928se

Someone on the 928UK measured a Cayenne motor (he has 928 and a cayenne) and concluded that the motor itself is very very similar to the 928 motor. The killer is that the Cayenne intake is tall compared 928 intake. I don't recall if he managed to measure the Cayenne oil pan but I wouldn't be surprised if it is somewhat deeper than the 928 pan.

John Veninger

I do a lot more than just blink when I add up what my track car has cost over the years. Then again I try not to add it up to often.

Makes the cost of my GT almost 10 years ago feel like I purchased an econobox!

hacker-pschorr

What I meant by that comment is $20k for a stroker is an accepted cost. Sure most 928 owners think anyone who spends that on a 928 engine is nuts. So what?

This thread was started with a simple question - would it work. He did not list 10 different options looking for the best route. I find it sad we as a 928 community cannot rally together and help our fellow owners to pull off these crazy ideas. Instead we beat them down with "That's silly" or "Option B is a much cheaper, better way to go".

Like I said before, if we were a rational group, we would not own 928's in the first place. At what point does irrational behavior (owning an maintaining a 928 in the first place) hit a brick wall where suddenly you must stop?

Look at Tim Sassen with his US-84. Considered by most around here the least desirable 928 to own after an 80-82 model. He orders a complete Rob Bud interior with a Champagne steering wheel then paints the whole car! If he had started a thread about these “ideas” it’s sad to say the thread would have been full of “just buy a nice S4, that car isn’t worth the money for those upgrades……”
Yes I realize this is a far cry from a $30,000 engine swap, doesn’t change the fact that as a 928 community, we should be supporting these crazy ideas, not ****ting all over them.

slate blue

I have over a hundred K in each of my 928s, its not about the money, if I had to buy brand new Porsche to get the similar condition it would cost more, atleast in this country where a new 911 or GT3 will set you back over $300K in the case of the GT3.

Greg

SwayBar

ANYTHING is possible if you throw enough MONEY at it.

Since that's usually the case, then why are we aiming so low? Why don't we install a Carrera GT motor instead? I've seen plenty of totalled ones so there must be engines available. That should up the cost a little, maybe an extra $100k?

heinrich

I would LOVE to see a Cayenne motor in a 928. From an enthusiast's perspective, I think it would be:

a) ridiculously fast
b) incredibly cool
c) very difficult but not impossible
d) a bit expensive unless you had an engine and did the work yourself.

Is the engine management needed or can one simply use aftermarket, Megasquirt etc? Plus, if you've got the wreck to source the engine, presumably the harness and brains are easy to toss into the deal?

Our friend Lizard would be an exceptional man for this job. Mike Simmard; Hammer; Murf; DR; Utah dudes are all more than able.

hacker-pschorr

I think you might be starting to catch on.
Like I said before, most of us surpass the value of our cars at least one time around just keeping them running. So the value of the car plays no part in deciding weather or not a project should be started. If one has the means and the desire, that is all that counts. Everything else is meaningless.
If one has the funds I would support that effort 100%. Sounds like an excellent idea.

Ever see a Dodge Viper motor in a replica Cobra? How about a Ferrari V12? I have.
Kit cobras without the engine are worth about the same as a 928. Didn't stop these guys from spending the farm on their dream car.
How about a big block Olds motor in a VW Beetle
Nice to see at least a few people know where I'm coming from.

Kaz

A Man who says something can not be done should get out of the way of the man who is actually doing it.

hacker-pschorr

Swabar,
Your estimation on what these engines are worth is WAY off. These are a mass produced auto's. There are probably more 4.5 liter Cayanne motors in junk yards than 928 produced.

There is a used 4.5 liter Cayenne long block in a junk yard 30 miles from my house with a 90 day warranty.

Guess how much.......



wait for it.......




wait for it......




keep waiting......



I called to verify the price, if I have a "friend" call it would be a bit cheaper......




still guessing????



$3,000


Yup, three thousand dollars, not even close to 20,000.