A disc full of countersunk holes sounds to me like one with a lot less
surface area to slow the car.
The only point for the holes that I ever saw was for rain fade
reduction. My 1977 Yamaha XS750 had solid discs. Being a motorcycle the
discs were fully exposed. In rain they would give you a looong period of
no brakes at all followed by a sudden return to function. One hell of a
formula for locking the front wheel and dropping the bike. Which I did a
couple of times until I figured out how to drive it better. Excellent
cardio-vascular exercise though. Heart rate from 70 to 250 in 1/2 a
second... Holes and slots would have helped on the bike, but not for any
reason related to normal braking operation. And in a car with the disc
protected by the wheel I can see no benefit at all. If heat is the
problem for racing, then a conversion to vented discs is the way to go
IMHO.
Mark
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net] On
Behalf Of Joseph Grant
Sent: August 26, 2007 9:08 PM
To: 'Bob Danielson'; triumphs@autox.team.net; 'Triumph 6 Pack'
Subject: RE: [6pack] TRF Brake Discs
I have used EBC Green Stuff pads. Save your money. They are very soft
and
they wear very quickly. You will get a very nice braking response from
them, but they just don't last very long.
Cross drilled/vented rotors: save your money. Been there done that. I
have a set of these rotors on my Z28 . The original idea was to pair
them
up with a good set of Kevlar pads. Yes, they look the part. Do they
help
any? Not really. You all have not mentioned this detail: they are
NOISY.
If you gently tap the brakes you won't notice much difference. However,
if
you hold the brakes for a few seconds you will hear a unique noise. If
that
is your thing, then have at it but I don't care for them.
Regarding the fact that ALL crossdrilled rotors will crack: That is not
exactly accurate. The crossdrilling must be done properly and the holes
must be countersunk. If that is the case, it will eliminate cracking.
Or
at least that is what the shop that CNC'd my rotors told me.
Joe
'72 TR6 - CC77169
http://www.bowtie6.com/
-----Original Message-----
From: owner-6pack@Autox.Team.Net [mailto:owner-6pack@Autox.Team.Net] On
Behalf Of Bob Danielson
Sent: Sunday, August 26, 2007 19:27
To: triumphs@autox.team.net; 'Triumph 6 Pack'
Subject: [6pack] TRF Brake Discs
TRF has their EBC HIGH-TECH BRAKE DISCS on sale this week
(http://tinyurl.com/36zb3d) and I'm wondering what ya'all's experience
is
with them beyond the "looks cool" factor. Do they make a difference in
braking in normal driving or are they mostly for the racer in us? Also
the
description says "finished in gold cadmium plating to protect them till
you
put them on your car". Does that mean the gold plating will wear off as
you
use them and what do they look like after that? Does anybody have
another
recommendation in the $190 range that TRF is offering?
Thanks....starting to collect parts for the brake rebuild project in
Nov/Dec.
Bob Danielson
1975 TR6 CF38503U
Running w/ Throttle Body Injection
http://tr6.danielsonfamily.org
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