Installing a Momo Club 4 Steering Wheel on
a Porsche 928 S4
NOTE: As of late 2006, the Club 4 appears to have been discontinued. I was able to buy another one recently, new in the box, from a private party. This guide will serve the same purpose for the installation other Momo steering wheels.
Besides the steering wheel, you will need a Momo hub adapter for the 928, which are widely available. Do a Net or eBay search and you should find one for about $70.
The Club 4 came with a Momo horn button surrounded by a bright aluminum trim ring.
Porsche crest Momo horn buttons can be found for about $50
through a Net or eBay search.
I was not happy with the aluminum horn button surround that Momo put on the Club4, so I decided to paint it semi-flat black. The surround can be removed from the wheel center cover by gentle pushing on it and flexing of the wheel center cover. Clean the surround with rubbing alcohol to remove your finger prints and other contaminants. A little paint and reassembly, shown with the button in temporarily in place, and Viola!
FOR A LARGER IMAGE, CLICK ON THE THUMBNAILS BELOW
IMPORTANT: Before removing the old
steering wheel, you must kill the power to the
horn. This can be done by removing the horn fuse (number 18), shown below. No need to disconnect the
battery as long as you remove this fuse. Check your fuse chart if you have
another model year 928.
After that, remove the horn center. Simply yank
fairly firmly on the sides of the center pad. It is held on at 3 points
(look at picture on left below), but with a good tug, it will pop off these mounts,
perhaps one at a time. After that use a 27mm
(or 1 and 1/16th inch) socket and ratchet with a long handle, such as a
torque wrench (or use a cheater
bar) to get some leverage. Lock the steering column. A few good tugs
and it should come loose. The torque value is 32 ft.lbs. After
loosening the nut, CENTER the wheel before removing it.
The picture below shows the underside of the Momo hub
adapter. Note the turn signal cancellation tab to the right of the
picture. The hub should be mounted with the signal cancellation tab facing
straight LEFT. Strangely, the directions Momo included would have
placed it on the right, which is clearly wrong.
If you look at the picture below closely (click to
enlarge), you will see an
upside down triangle circled in red at the lower part of the hub face.
According to Momo this should be at the top. However, that would have mis-oriented
the turn signal canceller. I set the hub on so the top and bottom most
attachment holes were dead on top and bottom and slipped it on. Note that
Momo throws you off visually a bit since the holes are drilled off-center of the side
arms of the hub. I've marked the center of the top-most arm with a red
line. Make sure
the attachment hole and not the center of the side arm is top-dead center.
Position the steering wheel over the holes to verify that it is centered.
Next a horn contact ring is set into the hub and the wheel is screwed on. Note the lone black wired that comes from the hub center - that is all that is needed. Attach the wire to the prong on the button. The button has a brass band that springs out from the side to ground against the contact ring inside the wheel. When assembling the button in the wheel you may have to hold that in to get it into the contact ring. You can see in the picture below that the button also has a large circumference metal ring that fits inside the 4 plastic pegs to exert retention pressure on the pegs.
IMPORTANT: After I assembled the horn,
and started to re-insert the fuse, the horn blew without me touching it. The wire was shorting against an extra wire prong that
was on the hub's horn contact ring. It is highlighted below in the thin red circle.
Note that it is shown bent in - this solves the problem, although you may as
well cut it off.
Finished product. Ain't she beautiful?
Addendum:
An alternative worth investigating...based on a post on the Rennlist 928 mail list...
The 930S steering wheel. Here's a 911 owner's guide to the installation of this wheel. I have seen this installed on a 928, and it looks great. The off-center spacer, mentioned in the 911 installation, is not needed. Here is a source for the 930S wheel: Pelican Parts 930S Wheel
