[urq] A4 brakes on urq

Sat Feb 16 19:30:35 PST 2008

Eric,
312 might be overkill but weren't you talking Boxster brakes in the same breath?  (the monoblocks should more than offset the weight gain in the rotor in that setup though, while bigger and lighter rims with the TT/A8 set will also address your concerns there) While I appreciate the keep it stock philosophy, (I've done little that is not reversible on my car)  why one would go and make such a one sided up grade like 2 or 3 generations newer power plants, or  brakes and pads or suspension and still ride on period tire sizing is a bit perplexing.  IIRC, stock UrQ engine and power levels etc are well in your rear view mirror? If so, why would you limit the potential effectiveness of those mods, and brake mods by running stock size rubber?  I think there is little doubt that by the middle to the end of the Urq run it should have been on bigger rubber, don't get me started on Audi sedans!  Free to try my TT/A8 setup and judge for yourself which way to go.  Initial tests don't point toward a Boxster S setup making it under 15s but we are a resourceful group.

From: racingiron at comcast.netTo: mdeltergo at hotmail.com; urq at audifans.comSubject: RE: [urq] A4 brakes on urqDate: Sat, 16 Feb 2008 19:52:11 -0500

Sorry Mike, I guess I misunderstood your statement.  I was thrown off by the "only the TT carriers make it bolt up to the UrQ" comment.  It sounded as if you were saying the stock A4 setup wouldn't work at all, which isn't the case.  Your opinion about the suitability of this "upgrade" is duly noted.

I'd like to point out that a great many owners here (myself included) won't likely consider any brake upgrade that prevents the use of the 8" Ronals.  For those, I'd say the A4 route isn't such a bad idea.  I'm willing to bet the caliper is lighter than the G60, and the extra rotor diameter certainly won't hurt.  Beyond that, the piston size is better matched to the stock MC, and will facilitate easier heel-toe action, IME.  For street-driven cars, the 312 mm solution might just be overkill, with the drawback of additional unsprung and rotational mass.

Also, keep in mind that the G60 setup was NOT stock for the US cars.  Those still running the stock brakes but looking for an economical upgrade that allows them to keep their original wheels should definitely consider the A4 stuff over the G60s.  I say that without having driven a car with the A4 stuff, but it looks good on paper.  I can say with certainty it wouldn't take much to best the G60s.

Eric R.
'86 urq
'92 urS
'93 urS

-----Original Message-----From: Mike Del Tergo [mailto:mdeltergo at hotmail.com] Sent: Saturday, February 16, 2008 4:42 PMTo: urq at audifans.com; racingiron at comcast.netSubject: Re: [urq] A4 brakes on urqEric,I am as certain as I was when I posted to the thread you noted almost 4 years ago!  (and so are the 8 folks who got in on the GB!)  If you read it all, Justin noted   "It does fit under a 15" wheel with the A4 brake carrier and rotor(288x25). Using that right now....until I can get the TT carriers....$186 eachfrom the dealer." As I mentioned the A4 carrier may allow the 288MM rotor, but that is not enough difference over the stock 276, IMHO, to be worth it.  AFAIK, to use the 312mm as we did, you need the TT carriers.Mike> From: "Eric Renneisen" <racingiron at comcast.net>> Subject: Re: [urq] A4 brakes on urq> > > A4 calipers yes, A4 caliper carriers no. Did a GB on > > these a few years back, A4/TT calipers, but only the > > TT carriers make it bolt up to the UrQ. > > I used 312mm A8 rotors. > > You sure about that? I'm fairly certain that I've heard the entire A4> setup bolts right up to the urq to fit under the 15" wheels. Justin> Riley stated he was running this back in '04:> http://www.audifans.com/pipermail/urq/2004-January/000537.html> I was seriously considering that route before I found out you can> squeeze a Boxster caliper and 300 mm rotor under the 8" Ronals (with a> little machine work on brackets and rotors).

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