Overhead Cams

[BOBTAIL]

http://www.centralvwaudi.com/new_page_1.htm

http://www.centralvwaudi.com/Russ_Fellows.htm

any other questions feel free to ask.

Paul

[Wally]

Hi,
How was Russ's experience with the deep sump? Any plans for dry sump or is it just not needed with a deep wet sump?
Thanks,
Walter

[BOBTAIL]

Originally Posted by Wally

Hi,
How was Russ's experience with the deep sump? Any plans for dry sump or is it just not needed with a deep wet sump?
Thanks,
Walter

no probs with oil supply at all .it also makes it easier to connect returns from heads ,so it looks like its here to stay.

[Da1Duc]

Nice work. The machine shop hours had to have been staggering.

D

[BOBTAIL]

Originally Posted by Da1Duc

Nice work. The machine shop hours had to have been staggering.

D

Not really, the thinking time was the greatest.
Once the ideas are planned out the machining was the easy bit.
I suppose that when I think of machine shop ,I think of lathes and millers and stuff. So that was a very small part .
The welding took the most time I guess. Still it turned out cheaper than going to Pauter heads and probably more reliable too.
After all It doesn't really have any non stock parts.
The cams are cut and pegged 911
The pistons are stock 944
The rods are stock 2.0 as is the crank


No you're right the machining that went into it are ,indeed staggering
I just hadn't added it all up.

This season it will have custom pistons, full engine managment, bigger turbo, redesigned inlet manifold and it'll look a lot prettier
Well at least for a week or so.

[vennard]

How do you get away with all that engine and using a non c/w crank shaft? I would have thought it would be one of the first things you did. Damn cool though I remember the magazine feature on it.

[Wally]

Speaking on OHC type 4 engines, has anybody ever heard of the 'Overfly' engine that Rolf Holzapfel developed for the Kaefer Cup?
Alex maybe?


It was a new development in 1995 from Holzapfel in which he also used the Porsche 964 cylinder heads AND the 100mm cylinders and pistons. He also used those with a 86mm stroke SCAT crank to give exactly 2,7 ltr.
He used a cam housing that his tuning workshop made themselves.
The test engine with 10,4 compression and self developed Melcher cams produced 247 (DIN) hp at 6250 rpm and 294 Nm at 5500 rpm! The engine used twin spark (from the dual spark 964 heads) and 51mm Weber carbs.

Personally I don't understand how you can use the stock 100mm cylinders which ran with 76,4 mm stroke in the 964 engine for 86mm stroke, but the picture in the german mag 'Gute Fahrt' showed all these parts indeed together!

Unfortunately these never did make it into the Kaefer Cup due to the 2 liter restriction the following year(s).

As you would supect, everything has been done already by some one.

Greetings,
Walter