[s-cars] Slotted vs. Drilled (was - Link to slotted rear Zimmerman Rotors)

[Ingo Rautenberg]

Good point, Frank.

I'm not exactly sure the specs on mine (not about to remove them now -- head
cold), but I believe they're about like yours Suffice to say Coleman has
numerous standard and custom apps, regular vented, directional vented, heavy
duty, lightweight, 8, 10 and 12 bolt hat bolts, etc.  All depends on the
app.  I believe mine are the heavy duty directionally vented ones with
cross-drilling.  Expensive at the time, but have proven their worth in
reliability and longevity.  For an exasperating idea of the different apps
available, check out:

http://www.colemanracing.com/prodex/cat.htp?cat=BRAKES

BTW, I definitely recommend having a non-directional swirl or crosshatch
pattern applied to help quiet things down.   800 miles and the crosshatch
pattern is still quite visible.

Another site with useful comments:

http://www.babcox.com/editorial/bf/bfe79719.htm

HTH

-Ingo
'91 200q20v...Slightly modified
'83 Urquattro
('90 v8q RIP)
http://hometown.aol.com/quattringo/index.html

----- Original Message -----
From: "Frank Amoroso" <fjamoroso at webtv.net>
To: "TM" <t44tq at mindspring.com>
Cc: "'Bob Rossato'" <bob.rossato at att.net>; <s-car-list at audifans.com>
Sent: Saturday, September 07, 2002 2:14 AM
Subject: RE: [s-cars] Slotted vs. Drilled (was - Link to slotted rear
Zimmerman Rotors)


> Nothing standard about coleman rotor patters vis-a-vis the 993tt rotor
> bolt pattern.
>
> BTW, my cross-drilled, directionally vented, 330x32 (31.75 really) or in
> 'Mericun: 13.0 x 1.25" Coleman rotors performed flawlessly while I had
> them. Including some heavy track days, as well as some good ol' fashined
> F'ing around, putting passengers into their seatbelts, HARD, without any
> warning. I've made more than a few grown men get really nervous about
> quickly reducing stopping distances at very high speeds.
>
> Frank at s-cars.org
>
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