I also have a VW collapsible Petri hub on mine but swapped out the cover to the 2 stepped BMW. Hopefully I never test it’s advanced safety design.
Patricia A. Mayer's 3.0 CS / Paul Cain's Fjord project / The 300 mile Test Drive / VIII / Final Punch List
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Apologies, I should have made that clearer. The molded and stepped plastic cover is purely decorative. It's the below part that is structural link between the wheel and the column. Below is an image of this VW engineered hub. The mesh design, material selection and welding on this device is what I was referring to. Most car guys cannot fathom just how much engineering and development goes into such a 'simple' part.
In the event of a crash, this gives you 3 additional inches of deformable material before the (rigid) column punctures your rib cage.
I could not agree with you more. The VW hub is a work of engineering art.
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Ah, the stepped cover is made out of plastic - didn't think of that. It all makes sense now. Thanks as always!
Does the E9 not have a "collapsable" steering column?
I have what appears to be the same mesh type of column on this Petri "2002 turbo" wheel.
EDIT: I should add that I got this wheel from my friend Gary @Bimmer 3.0 CS
I am still looking for the decorative 3 step cover.
EDIT: I should add that I got this wheel from my friend Gary @Bimmer 3.0 CS
I am still looking for the decorative 3 step cover.
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1974 MY and forward Coupes had an "adjustable'' column. (this became std. on the E12) When the chrome adjusting handle is tight, I can assure you the column length is not collapsible. In a force vs. acceleration contest the pinch strength of the column 'nut' is going to be much larger than what your ribs can absorb.
Nice pic! you might want to troll the VW Scirocco forums, that is one source. circa 1977-79? (others will likely know more)
This made me think... You said in post 402 that "The VW hub is a work of engineering art." Since mine appears to be original to this wheel, which has nothing to do with VW, does it not imply that this collapsible column was made by Petri, redarless of which car it ended up with?
Petri would be the Tier I supplier of both the wheel and the hub. Design responsibility, Drawings, Product Validation & Testing would all be owned and controlled by the OEM.
That is a very cool hub. I learn something new every day about these BMWs.
That '02 Turbo wheel hub looks like the same accordion design as the Sirocco hub. Nice looking wheel too.
Currently have a Petri 320is design wheel installed and it has a similar cut-out hub, but the cutouts are larger and less regular. Does not look as collapsible as the VW hub & that seems odd given it's later production. Circa early '80's.
-Regarding other safety features during your re-freshening; have you replaced the belts in your car, or do you consider it unnecessary?
Currently have a Petri 320is design wheel installed and it has a similar cut-out hub, but the cutouts are larger and less regular. Does not look as collapsible as the VW hub & that seems odd given it's later production. Circa early '80's.
-Regarding other safety features during your re-freshening; have you replaced the belts in your car, or do you consider it unnecessary?
I kept all of the original seat belts in place. The retractors still worked great and they are the originals.
Thanks for posting this video: When I bought my coupe I looked up the manufacturers' recommendation for the life of the webbing in the original seat belts in our cars. The recommended life was 25 years. For anyone who is still using their original seat belts, please replace the webbing. Seat belts may not work if the webbing doesn't hold.
Don’t want to hijack this thread, but the vast majority of Petri and Momo hubs moved to a collapsible steel mesh by the late 70’s. The original CSL/2002/CS ribbed Petri hub is a collapsible accordion also. Same as Italvolanti, which just has the accordion externally with texture paint.
Lastly, The e9 did have a collapsible (not referring to telescopic) lower steering column.
There are little rings cut into the bottom
of the lower column that indicate which is which. It is documented in the blue books with a photograph.
Lastly, The e9 did have a collapsible (not referring to telescopic) lower steering column.
There are little rings cut into the bottom
of the lower column that indicate which is which. It is documented in the blue books with a photograph.
Markos - certainly not a hijack. It's good input. The dwg shows No. 7 and No. 8 as equal substitutes. This is new to me. I've never seen that collapsible shaft on an E9. I just checked Patricia's (9/73 build date) and it has the solid steel shaft (no. 8) as shown. Have you seen one on a Coupe?
Not that I've ever thought about it before now, but my -71 CSi has a collapsible shaft. Bad pic, but it's there.
The Parts Book shows #7 as 2800CS only and discontinued by 1975, #8 is 3.0CS up until 1974 MY.
never new this about the 2800cs as my coupe has a '74 adjustable steering column. interesting discussion.
Very interesting. And that they would discontinue a safety item. I've never seen one, but my time with 2800's is much more limited.
I pulled in from a 2800CS parts car. I would have to check but I think my 2800CS has a fixed shaft.