[s-cars] question about 993tt rotors

[Sean Douglas]

Ken:

Yes, the part numbers are the same as mine, but the fasteners on mine
are identical - weird. Perhaps old stock?

Where did you source yours from? Mine came in Porsche boxes from the
dealer.

Sean

> -----Original Message-----
> From: Kenneth Keith [mailto:auditude at gmail.com] 
> Sent: Monday, April 24, 2006 8:45 PM
> To: Sean Douglas
> Cc: 200q20V mailing list; s-car-list at audifans.com; www. billzcat1. com
> Subject: Re: [s-cars] question about 993tt rotors
> 
> 
> Hi Sean,
> 
> Thanks for the reply.  My rotor part numbers are 99335104610 
> and 99335104510.  My fasteners are tight in the hats too, 
> both distinctly different groups.
> 
> Here's a pic of the two fasteners. 
> http://pictureposter.audiworld.com/33707/t-fastener.jpg?
> 
> Thanks,
> 
> Ken
> 
> On 4/24/06, Sean Douglas <quattro20v at telus.net> wrote:
> > Ken:
> >
> > I just swapped over billzcat1 custom hats and did not notice any 
> > difference between left and right, seemed to be the exact 
> same. Also, 
> > no gasket either. Are you sure both rotors are for the 993tt?
> >
> > I did notice however, that the "t-lock" fasteners you 
> describe were a 
> > very tight fit in the hats and I had to carefully press these in.
> >
> > BTW, the torque value on the bolts is very low, 8 ft-lbs, IIRC.
> >
> > Cheers,
> >
> > Sean
> >
> > > -----Original Message-----
> > > From: s-car-list-bounces at audifans.com
> > >
> > > Some of you may be running brakes using 993tt rotor rings 
> and custom 
> > > hats, and able to help with my question.  I have a 
> Billzcat1 Turn 9 
> > > setup for my 200q20v, which has custom hats and brackets to mount 
> > > 996tt "big bloc" calipers and 993tt rotor rings, and I've got a 
> > > question about the hardware that holds the rings to the 
> hats, which 
> > > consist of "t-lock" fasteners and bolts.  I bought the kit with 
> > > unused rotors from a lister and am sorting things out to install 
> > > them.
> > >
> > > The t-lock fasteners (sort of a sleeved nut) that 
> attaches the rotor 
> > > rings to the factory hats (which need to be removed and replaced 
> > > with the custom ones, re-using the hardware) are 
> different from left 
> > > to right.  These t-lock fasteners have an internally 
> threaded tube 
> > > that runs through both hat and rotor, and the bolt goes 
> through that 
> > > from inboard.
> > >
> > > One set/side (can't remember left or right) has longer fasteners 
> > > that bottom out against the bolt before the rotors are clamped 
> > > tightly against the hats, leaving the rotor able to float 
> away from 
> > > the hat slightly, and the other set/side has a stepped 
> fastener that 
> > > is quite a bit shorter and when bolted up will put the 
> hat in tight 
> > > contact with the rotor ring with no play.
> > >
> > > The diameter of the holes in one rotor is about 5.0mm and 
> the other 
> > > is 5.5mm, as far as I can tell.  Both t-lock fasteners are 5.5mm 
> > > towad the "head," as are the slots in the billzcat1 hats, and the 
> > > "shorter" set of t-locks has stepped down to go into the 5.0mm 
> > > holes.
> > >
> > > I think the 5.5mm sections of the shorter ones might be 
> the correct 
> > > length to bolt up to the hat leaving some float, but cinch up 
> > > against the rotor firmly, while the other t-locks are 
> different and 
> > > would leave both rotor and hat able to potentially float 
> along the 
> > > whole fastener (instead of just on the thicker part that 
> goes inside 
> > > the hat, being solidly attached to the thinner part 
> between the bolt 
> > > and "shoulder" created by the 5.5mm-to-5.0mm reduction.  I don't 
> > > think more words will help in describing this, so that's 
> it for now. 
> > > =)
> > >
> > > In addition to this difference between left and right 
> rotors, I also 
> > > found that one of the rotors had a thin black gasket between the 
> > > factor hat and rotor ring, but the other side didn't have 
> any such 
> > > gasket.  The gasket is way thinner than the difference in t-lock 
> > > length (depth really, as the overall length of the 
> fasteners are the 
> > > same, but the "shorter" ones have a much thicker "head" area).
> > >
> > > I haven't gotten a chance to take pics yet, but I will do 
> that.  My 
> > > basic question is whether there should be a difference 
> between how 
> > > the left and right rotors are attached to the hats.  If one is 
> > > better than the other, such as the shorter ones that bolt up 
> > > tighter, then should I shorten the longer ones?  Right now, if I 
> > > bolt it all up without worrying about it, one rotor/hat combo is 
> > > completely tight and the other has play where the fasteners can 
> > > slide back and forth (or the hat pulled away from the rotor 
> > > slightly).
> > >
> > > Thanks,
> > >
> > > Ken
>