[Supras] Want good braking?? (track use pads review)

[Walker, Brian (Rich. Dist)]

Thanks Howard. Different compounds all together, Geoff had recommended a
pad that would heat up quicker for the rear (R-41) since they wouldn't
be in the working range of the front pads. I was a little concerned they
might grab too much with that and feel like the effect of pulling the
hand brake but it was balanced even when braking a little too late while
starting a turn :)
 
Dust comparison is hard to say since it was a track weekend, from what I
can remember it was about the same (wheels had lots of dust/debris after
this kind of use each time) but a good amount is rubber and the track
was just repaved last week so there was a lot of dirt from the
construction and dry weather. These (ST-41) are definitely not a street
pad, they do bite when cold but will probably wear rotors quickly until
heated. I've got some temp charts comparing them if you want to see
them.
 
Brian

________________________________

From: Howard Hutchinson [mailto:bighoward at sbcglobal.net] 
Sent: Monday, October 15, 2007 3:47 PM
To: Walker, Brian (Rich. Dist); Supras at supras.com
Subject: Re: [Supras] Want good braking?? (track use pads review)


Great report and invaluable feedback Brian.  
 
I'll assume that the *41 for the ST and R pads are the same compounds,
just different manufacturer?
How does the dusting compare to the R4S?


"Walker, Brian (Rich. Dist)" <Brian.Walker2 at VDOT.Virginia.gov> wrote:

	Well, I finally got to try out the new pads at Summit Point (WV)
this
	weekend. I'm using the Raybestos ST-41 in front and Porterfield
R-41 in
	rear (normally using R4S for street/auto-x). The pads did end up
scoring
	my rotors which is likely my fault from not breaking them in
properly. I
	went easy the first few laps (maybe too easy?) and then got a
little
	harder on them but never really standing on the pedal. The
second day I
	was dealing with some vibration under hard braking, which made
me a
	little timid to really stand on them but when I did it was what
I
	thought would require a BBK to feel. At the end of the straight
I was
	getting a little annoyed by Miatas and an MR2 for braking so
early. Same
	result through the 'chute' (fast downhill into a hairpin) I was
finding
	myself going off-line to avoid some other cars. He instructor
	complemented my smoothness but still I'd see him lunge forward
at each
	brake application. Not one occurrence of fade either (the pedal
got a
	little soft due to the now weak link fluid) but some siding due
to
	relearning threshold braking (abs came in much quicker than
before so
	the braking pressure had to be relearned) 
	
	I could not believe a 3600 lb car could stop like this! It was
very cool
	to catch lighter cars in the hairpin at the end of the straight
because
	I was able to brake so much later. The really let me be faster
	throughout the track. Got the signoff for solo (group 1) and
moved to
	the next group. The R4S stopped well last year (this is my
second event)
	but wore quickly, these stopped much quicker. I had visions of
coming
	through a downhill sweeper at 80 mph and into a hairpin and
sliding
	across the sand/grass skipping a few turns. Instead, plenty of
stopping
	power even on street tires! I'll check the wear on these pads
and report
	back.
	
	Brian W-88T
	
	
	
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