[s-cars] I'm finally studly... (long)

[steve powers]

As I see it...

Pros:
    - you can see directly how much thread engagement you have (w/ plain
nuts)
    - track day wheel/brake pad changes are much quicker
    - hot rotors don't fall off or move out of position during pad
change

Cons:
    - you already own lug bolts

Steve

>  -----Original Message-----
>  From: s-car-list-admin at audifans.com
>  [mailto:s-car-list-admin at audifans.com] On Behalf Of Scott Munger
>  Sent: Tuesday, June 24, 2003 8:53 PM
>  To: 'steve powers'; 'northwest audi enthusiasts'; '* S
>  List'; 'BIRA ORG'
>  Subject: RE: [s-cars] I'm finally studly... (long)
>
>
>  Would you mind explaining the pros/cons of lugs versus studs?
>
>  --Scott Munger
>  '93 S4
>  '97 Cabriolet
>
>
>
>  > -----Original Message-----
>  > From: s-car-list-admin at audifans.com
>  > [mailto:s-car-list-admin at audifans.com]On Behalf Of steve powers
>  > Sent: Tuesday, June 24, 2003 8:33 PM
>  > To: 'northwest audi enthusiasts'; '* S List'; 'BIRA ORG'
>  > Subject: [s-cars] I'm finally studly... (long)
>  >
>  >
>  > (cross-posted to BIRA, S-cars and NW Audi)
>  >
>  > Since installing my BIRA Sys 6 brake setup, I wanted to
>  install wheel
>  > studs to make the wheel installation easier. At issue is the
>  > additional 3mm of rotor hat thickness which sort of defeats the
>  > hub-centric wheels
>  > where you put on the wheel, spin and slip in a bolt - all at
>  > once. Studs
>  > seemed like the best way to go, so I began researching the problem.
>  >
>  > The urS6/S4s use a pretty hefty lug bolt size (14x1.5mm).
>  Removing one
>  > lug bolt and measuring several times with a 16p nail,
>  hooking the head
>  > on the backside of the hub, I came up with a stud length target of
>  > 60mm overall length. I figured this length should allow for a
>  > to-be-sourced lug nut and still not protrude from the wheels.
>  >
>  > Calling a local vendor for H&R lugs I explained how I measured and
>  > what I wanted. They got the lugs and I took them home. They were
>  > wrong - too
>  > long by about 20mm! The studs consist of three areas: hub
>  > thread, waist,
>  > and lug thread. The length H&R quotes is lug thread. It makes
>  > some sense
>  > as you are supposed to thread in the lugs, bottoming them out
>  > in the hub
>  > on the waist of the stud. Re-order, this time in H&R's 40mm length.
>  >
>  > Meanwhile, I need some nuts. The stock wheels (and my 3 piece HRE
>  > wheels) use a ball seat. The rub is that there just aren't any
>  > aftermarket ball seat lug nuts. I checked with Tire Rack
>  and others,
>  > including searching the web. You can get the standard steel ones,
>  > which I did. (Note: most aftermarket wheels use cone seats and you
>  > won't have
>  > this problem - it's just that mine didn't)
>  >
>  > I did discover though that Porsche also used 14x1.5mm lugs. They
>  > previously used lug nuts (alloy even!) on all of their cars but
>  > recently went to a funky lug bolt setup with spinning ball seat
>  > collar. I went to
>  > the local P-car parts dept. and bought one of the older
>  black anodized
>  > allot lug nuts. It was the right thread pitch and may fit, though I
>  > wouldn't know until I installed the studs.
>  >
>  > I got the new studs today. I immediately removed a lug
>  bolt and put in
>  > a stud. It fits! I jacked up the car and installed all the
>  > studs using red
>  > loctite and torqued them to 100 lb-ft with a double nut. I
>  > put the wheel
>  > back on and tightened a couple of the steel nuts on. I
>  measured to see
>  > if the stud would bottom out on the Porsche lugnut. Nope, it
>  > will work.
>  > Yippee!
>  >
>  > Because I only had one Porsche nut, I installed the steel
>  nuts. I have
>  > found an aftermarket supplier (www.boothedesign.com) for
>  Porsche lug
>  > nuts in polished stainless. At $7 each, they're cheaper
>  than the local
>  > Porsche dealer, who wanted $10 apiece for the weaker (but
>  > lighter) alloy
>  > ones. Boothe Design can also provide matching locks.
>  >
>  > Moral of the story: order the 14x1.5mm studs in 40mm
>  length and hope
>  > your aftermarket wheels have cone seats. (you will need
>  ball seat nuts
>  > for the stock wheels)
>  >
>  > Steve Powers
>  > 95.5 S6 Avant
>  >
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