Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster Racing Forum

Reply
 
LinkBack Thread Tools Display Modes
Old 03-07-2012, 03:14 PM   #1
Registered User
 
Join Date: May 2011
Location: Miami florida
Posts: 1,589
Brake glaze

On my first track day, I noticed I was getting some significant glazing on the front rotors. I am running stock Brembo pads. I felt a little loss of braking at very slow speeds, at speed, the braking felt fine but towards the end of the day, I was getting some very slight vibration in high speed braking. After driving around on the street a feww days, he glaze is gone and no vibration.

Its a street car, I don't want to go to a super aggresive, loud, dusty pad, but what are the recommendations for a step up, something that doesn't glaze?
__________________
Current car

2000 Boxster 2.7l red/black

Previous cars

1973 Opel Manta
1969(?) Fiat 850 Convertible
1979 Lancia Beta Coupe
1981 Alfa Romeo GTV 6
1985 Alfa Romeo Graduate
1985 Porsche 944
1989 Porsche 944
1981 Triumph TR7
1989 (?) Alfa Romeo Milano
1993 Saab 9000

Last edited by san rensho; 03-07-2012 at 03:17 PM.
san rensho is offline   Reply With Quote
Old 03-07-2012, 07:17 PM   #2
SPB racer
 
Join Date: Feb 2011
Location: San Antonio TX
Posts: 252
Garage
What are the symptoms of glazing?
Jittsl is offline   Reply With Quote
Old 03-08-2012, 03:46 PM   #3
Registered User
 
ChrisZang's Avatar
 
Join Date: Mar 2006
Location: San Carlos, CA 94070
Posts: 1,450
Porterfield R4S
__________________
I still wave at Boxsters, but they no longer wave back :-(
2002 Boxster S "Violet" (sold but not forgotten)
2009 Carrera 4S "Kelsey" (current ride)
2015 FIAT 500e "Nikki" my commuter car
ChrisZang is offline   Reply With Quote
Old 03-08-2012, 04:35 PM   #4
Registered User
 
jaykay's Avatar
 
Join Date: Sep 2009
Location: toronto
Posts: 2,276
Never had this glazing effect or vibrations..........I get a lot of vibrations from my tires as I have marbles melted in my tread...for the long drive home
__________________
00 986 S....with a few tweaks
jaykay is offline   Reply With Quote
Old 03-09-2012, 12:47 PM   #5
Registered User
 
Brad Roberts's Avatar
 
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
Was the vibration in the pedal??

I have seen plenty of pad deposits on the rotors cause pedal vibration.



B
Brad Roberts is offline   Reply With Quote
Old 03-09-2012, 02:34 PM   #6
Registered User
 
Join Date: May 2011
Location: Miami florida
Posts: 1,589
Quote:
Originally Posted by Brad Roberts View Post
Was the vibration in the pedal??

I have seen plenty of pad deposits on the rotors cause pedal vibration.



B
Yeah, it was vibration in the pedal and a bit in the wheel. The rotors were fairly gunked up, I guess I was cooking the pads pretty good. I'm just going to go with track pads next time I go to the track.
__________________
Current car

2000 Boxster 2.7l red/black

Previous cars

1973 Opel Manta
1969(?) Fiat 850 Convertible
1979 Lancia Beta Coupe
1981 Alfa Romeo GTV 6
1985 Alfa Romeo Graduate
1985 Porsche 944
1989 Porsche 944
1981 Triumph TR7
1989 (?) Alfa Romeo Milano
1993 Saab 9000
san rensho is offline   Reply With Quote
Old 03-09-2012, 02:46 PM   #7
Registered User
 
Brad Roberts's Avatar
 
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
Newbies.. always.. always over use the brakes until they trust the car

Throw on a set of Pagid pads.. blacks.. you have a local distributor in your area.



B
Brad Roberts is offline   Reply With Quote
Old 03-09-2012, 02:48 PM   #8
Registered User
 
Brad Roberts's Avatar
 
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
Slippery slope..

He is looking closely at the "Track Pipe".. he took his first hit recently



B
Brad Roberts is offline   Reply With Quote
Old 03-09-2012, 02:53 PM   #9
SPB racer
 
Join Date: Feb 2011
Location: San Antonio TX
Posts: 252
Garage
Quote:
Originally Posted by san rensho View Post
I'm just going to go with track pads next time I go to the track.
Or use the brakes less.

You will probably find (if you are like most of us) that, in your early learning days, you will overbrake - on them too long and too soft. After a while you will learn to enter faster and use less brakes - on them less time but still too soft. Later again you will learn to approach everything a lot faster and brake in the shortest possible distance using the firmest peddle you can apply smoothly - at that time you might start worrying about brake pads. Till then I would save yourself the issues and costs associated with racing pads unless you have money to burn and have the time to change pads in and out between events.

I would bet that by your 2nd or 3rd event you are no longer be heating your brakes up nearly as much despite the fact that you will be circulating much quicker.

Laurie

Sorry to be repetitive. Brad was typing his reply the same time I was.

Last edited by Jittsl; 03-09-2012 at 03:11 PM.
Jittsl is offline   Reply With Quote
Old 03-09-2012, 04:01 PM   #10
Registered User
 
Join Date: May 2011
Location: Miami florida
Posts: 1,589
Quote:
Originally Posted by Brad Roberts View Post
Newbies.. always.. always over use the brakes until they trust the car

Throw on a set of Pagid pads.. blacks.. you have a local distributor in your area.



B
Not to brag, but, I raced motorcycles on this track several times so I knew the course fairly well and I was up to pace since I was rarely passed and was pointed by by several Vettes and Mustangs. I was getting into the corners fast. I was braking hard, just not at the last second to give myself a cushion and not get in too deep. The pads just weren't up to it.
__________________
Current car

2000 Boxster 2.7l red/black

Previous cars

1973 Opel Manta
1969(?) Fiat 850 Convertible
1979 Lancia Beta Coupe
1981 Alfa Romeo GTV 6
1985 Alfa Romeo Graduate
1985 Porsche 944
1989 Porsche 944
1981 Triumph TR7
1989 (?) Alfa Romeo Milano
1993 Saab 9000
san rensho is offline   Reply With Quote
Old 03-09-2012, 04:16 PM   #11
Registered User
 
Brad Roberts's Avatar
 
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
Then "newbie" doesn't apply.. and.. you already owned a "track pipe"

Lose the junk stock pads designed for "merican" drivers. You'll be fine.



B
Brad Roberts is offline   Reply With Quote
Old 03-09-2012, 04:25 PM   #12
Registered User
 
Join Date: May 2011
Location: Miami florida
Posts: 1,589
Quote:
Originally Posted by Brad Roberts View Post
Then "newbie" doesn't apply.. and.. you already owned a "track pipe"

Lose the junk stock pads designed for "merican" drivers. You'll be fine.



B
Yeah, I thought I kicked the habit, but I said to myself, just one little hit, can't hurt, right?

Yes, I've relapsed.
__________________
Current car

2000 Boxster 2.7l red/black

Previous cars

1973 Opel Manta
1969(?) Fiat 850 Convertible
1979 Lancia Beta Coupe
1981 Alfa Romeo GTV 6
1985 Alfa Romeo Graduate
1985 Porsche 944
1989 Porsche 944
1981 Triumph TR7
1989 (?) Alfa Romeo Milano
1993 Saab 9000
san rensho is offline   Reply With Quote
Old 03-09-2012, 05:24 PM   #13
Registered User
 
Brad Roberts's Avatar
 
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
Sir, please step away from the track pipe..
Brad Roberts is offline   Reply With Quote
Old 03-09-2012, 05:39 PM   #14
SPB racer
 
Join Date: Feb 2011
Location: San Antonio TX
Posts: 252
Garage
Pagid blacks like Brad said. Maybe even orange.
Jittsl is offline   Reply With Quote
Old 03-09-2012, 05:41 PM   #15
Registered User
 
Brad Roberts's Avatar
 
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
I thought about having him run Orange, but the initial bite they have is a little much for stock shocks/stock springs

I know the owner of Hawk, I'll be trying their pads again soon... they have some new compounds out.



B
Brad Roberts is offline   Reply With Quote
Old 03-09-2012, 06:50 PM   #16
Registered User
 
Join Date: May 2011
Location: Miami florida
Posts: 1,589
I did some searches and I saw some good reviews on the Hawk HT 10, not super aggressive, but a step up, like you said Brad, I don't want to overload my bone stock suspension.

Jittls, changing out pads before and after a track day wouldn't be a big deal, but will I have to go through a long bedding in routine before I go on the track?

The only other mods I may do is change the alignment to get as much negative camber front and rear as possible stock.

I think my tire pressures were OK. On Bridgstone So 2A I was going from 30 PSI cold to 38 hot. I had to let out some air since I started at 34 and after a couple of sessions, I was above 40. Any thoughts on pressure?
__________________
Current car

2000 Boxster 2.7l red/black

Previous cars

1973 Opel Manta
1969(?) Fiat 850 Convertible
1979 Lancia Beta Coupe
1981 Alfa Romeo GTV 6
1985 Alfa Romeo Graduate
1985 Porsche 944
1989 Porsche 944
1981 Triumph TR7
1989 (?) Alfa Romeo Milano
1993 Saab 9000
san rensho is offline   Reply With Quote
Old 03-09-2012, 09:26 PM   #17
Registered User
 
Brad Roberts's Avatar
 
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
Bedding process takes 15min on the freeway. Accelerate to 80, stand on the binders down to 45, back up to 80, back down to 45, one more time... And then drive without touching the brakes for 10min to let them cool. I do this.. And smoke is rolling out the fenders... Now they are properly bed
Brad Roberts is offline   Reply With Quote
Old 03-09-2012, 09:28 PM   #18
Registered User
 
Brad Roberts's Avatar
 
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
Most of the time we are bedding race car brakes on the "out" lap, which is fine too.
Brad Roberts is offline   Reply With Quote
Old 03-09-2012, 10:04 PM   #19
SPB racer
 
Join Date: Feb 2011
Location: San Antonio TX
Posts: 252
Garage
Quote:
Originally Posted by Brad Roberts View Post
Most of the time we are bedding race car brakes on the "out" lap, which is fine too.
My specBoxster is a track only car so that's what I do. One lap with some hard usage (of the style discussed by Brad's freeway example) followed by one lap with as little usage as possible and your on your way. Once new pads are bedded you will probably find them to be immediately usable on subsequent refits - the disc's pattern will not change much from street usage inbetween. My guess would be that the bedding of your boxster's brakes would be identical to that of your race bikes. What is your local track and what did you race there?

Just for the record, I use Pagid oranges in my GT3 which is primarily a street and occasional DE car and do not change them out in between. The noise drives some people (my wife) crazy but I do not give it a second thought.

Laurie
Jittsl is offline   Reply With Quote
Old 03-09-2012, 10:19 PM   #20
Registered User
 
Join Date: Jan 2012
Location: Worcester
Posts: 57
Have you guys tried carbotech pads? I have run them over here and have been very impressed
Splitpin is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 06:17 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page