John Struthers

Someone posted a flick of a rear/mid engined 928 last year,
-shopped?- dunno...
The sHARk look normal.
Say if you try it and it doesn't work I'll buy it off ya' for 1k , assuming the computer, relay/fuse panel and wire looms come with it.
The old Ford F 150 is heading toward 200,000 and could probably use a fresh engine.

bcdavis

So to make the 928 mid-engined, would you just eliminate the torque tube, and bolt the engine right up to the transaxle? Remove the rear seats, and there would be room... Probably need to get creative with the cooling, etc...
Not sure you would gain that much in terms of handling.
Probably cheaper and easier to build a tubeframe car from the ground up.
Too much fabrication, for an uncertain reward...

Marc Schwager

"The other advantages are the lighter weight, it is about 40 kilos lighter"

Would you move the battery to the front to keep the weight distribution intact?

slate blue

The McMerc block and the Porsche Cayenne block together.




Notice any similarities?

TeufelHei

Ummm they're both 8 cyl and made of aluminum?

I'm seeing some serios differences in castings, water passages, accesory mounting, bellhouse boltup...etc.

Am I missing something here?

TeufelHei

Presumably the 5.5L McMErc motor is simply a stroked 4.5L? Is bore diameter similar?

slate blue

Just got a response back from the seller of the Cayenne engine and he says the Cayenne engine looks visially smaller. My concerns are that the sump will needing certain modification will not allow the engine to sit low enough. The only way to tell for sure will be to wait to my local Porsche dealer pulls one out for some work.

O.K the similarities are not that they are both Alusil as the McMerc is Nicasil, but looking at the bottom construction of the engine. The cradle design and the incorporation of the dry sumping. The Porsche block will need to get wider at the sump area when it goes in a 928 as it doesn't have the depth of the Cayenne. So the proportion will be near identical. But notice on the McMerc engine again it doesn't have a really small distance from the crankshaft to the bottom of the cradle(Cayenne not so bad) like the 928. This will limit how low they can fit in a chassis such as the 928. This I see as the major hurdle.

TeufelHei

I see this as my major hurdle

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TeufelHei

Aww heck, it didn;t come out right. Oh well you get the point

Gretch

Awhile back someone here posted a picture of a pepper turbo engine. the intake manifold sits way high on the block if I remember correctly. There was a thread about this subject back maybe 6 months ago or so and the conclusion was there was no way the pepper engine would fit under the hood of a 928..........