Is there a Fuchs Tutorial?

[ghalperin]

I picked 2 pairs of 15x6 wheels as a set of 4.
The first pair are dated 373, 911 361 020 00, ~6mm wide lip around hub, 66mm center

The second pair are dated 974, 911 361 020 10, ~4mm wide lip around hub, 71mm center

The set came with 3 prong caps



What are the correct caps for the later wheels? I know that they are the ring type, but holes or no holes for the removal tool?
Did any of the 3 prong caps have holes?

[Jim Breazeale]

The later wheels (some time in 1973, mostly for 74 YM cars) came with ring type hubcaps. The original caps did not have holes in them.
they were discontinued by Porsche many years ago and replaced with ones with holes. If you can find a couple of caps with no holes, you can put that set of wheels on your car and nobody will notice that the wheels don't match. One second thought, put the 2 late wheels on one side and the early ones on the other side. That way, nobody will be able to nitpic your wheels

Regards

Jim

[StephenAcworth]

some history from the company themselves: http://www.fuchsfelge.de/index.php?id=4&L=1

[StephenAcworth]

and a video of the production process: http://www.fuchsfelge.de/index.php?id=718&L=1#c5076

[friggens]

Awesome thread. Subscribed...

[moito]

just noticed that the rim on post #7 is a prototype with different horn....similar to the rim that was sold in ladenburg auction last weekend.

[Jm993rs]

Very good info here !!

[Harvey Weidman]

just noticed that the rim on post #7 is a prototype with different horn....similar to the rim that was sold in ladenburg auction last weekend.

The gold anodized wheel is a standard early 6X15. That is a reflection, not a different profile. I have seen them use gold anodizing used in other presentation wheel parts.
As I remember, that was the meeting when they were discussing the reason that the early profile didn't lend itself to any more widening. Thus the cut away piece showing the drop center had to be moved outward and required the shorter spokes so there wouldn't be any interference. From this meeting was the birth of the late (flat) 6 wheel to accommodate the close drop center and being able to make the 7-11 widths.
H

[moito]

The gold anodized wheel is a standard early 6X15. That is a reflection, not a different profile. I have seen them use gold anodizing used in other presentation wheel parts.
As I remember, that was the meeting when they were discussing the reason that the early profile didn't lend itself to any more widening. Thus the cut away piece showing the drop center had to be moved outward and required the shorter spokes so there wouldn't be any interference. From this meeting was the birth of the late (flat) 6 wheel to accommodate the close drop center and being able to make the 7-11 widths.
H

Mea culpa! Mea culpa!
i think i need a bigger screen
or get my eyes checked ...

[Haasman]

From the Otto Fuchs company web site-

We give form and function to high performance materials

The superior properties of forged alloy wheels as compared to cast ones result from the applied material.

The OTTO FUCHS forging material, a forging alloy with at least 95% aluminium , is far superior to any cast material with respect to strength and ductility. Reduced wall-thickness and weight reduction are the result of the combination of best materials and most modern manufacturing and simulation techniques. Not least: In extreme driving situations the forged aluminium wheels offer greater safety margins than cast wheels.

Another important advantage of forged alloys is the feasibility of polishing: the dense microstructure without porosity and the low silicon content are not only responsible for the superior mechanical properties but also allow for high gloss polish of the wheel surface . Also in this regard forged wheels are setting the standards!

---

Strength- / Tensile test

The following pictures show a tensile test to prove the material properties of the used alloy.

<dl class="csc-textpic-image csc-textpic-firstcol" style="margin-right: 10px; margin-bottom: 10px; display: inline; float: left; width: 208px; margin-left: 0px !important;"><dt style="margin: 0px; padding: 0px; display: inline; float: none;"></dt><dd class="csc-textpic-caption" style="margin: 0px; padding: 0px; float: none;">sample before tests
</dd></dl><dl class="csc-textpic-image csc-textpic-lastcol" style="margin-bottom: 10px; margin-left: 0px; display: inline; float: left; width: 208px; margin-right: 0px !important;"><dt style="margin: 0px; padding: 0px; display: inline; float: none;"></dt><dd class="csc-textpic-caption" style="margin: 0px; padding: 0px; float: none;">sample after tests</dd></dl>



The sample on the left side (on each picture) was taken from a forged aluminium wheel and the sample on the right side was taken from a cast aluminium wheel.
The sample of the cast wheel breaks quicker.

The reason: Cast wheels have a lower tensile strength and - especially - a lower elongation.