? about cobra rear brakes and prop valves - Ford Mustang Forums : Corral.net Mustang Forum
 
LinkBack Thread Tools Display Modes
post #1 of 10 Old 05-04-2009, 08:33 PM Thread Starter
Registered User
 
loudnslow98gt's Avatar
 
Trader Feedback: (5)
Join Date: Aug 2006
Location: new jersey
Posts: 763
? about cobra rear brakes and prop valves

so i did an HPDE with the SCDA and had over 5 hours of track time. i put Hawk HPS pads on the front last thursday. i left the rears alone. about 5 hours into it, my front brakes were down to the backing plates.(and thats with the first 2 sessions in the wet). but my rear pads, which have been on since my first event last summer, still have about 1/2 life on them. so my front brakes are doing the lions share of my braking. whats the best way to get my rear brakes to help out more so i don't keep destroying my front brakes after each event? should i finish the cobra brake swap and put them on the rear? and would i need a prop valve? and next time ill try the HP+ on the front.


AJ Hartman
RHRPerf.com
facebook.com/rhrperformancellc/
2013, 2016-217 NASA Northeast American Iron Champion
loudnslow98gt is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 05-05-2009, 08:00 AM
Registered User
 
huesmann's Avatar
 
Trader Feedback: (6)
Join Date: Jul 2004
Location: DC burbs, MD side
Posts: 6,894
From what I hear, HPS and HP+ pads are not really good pads for HPDE. They're OK for autocross because you never really get your brakes that hot. The reason is that they have a very steep falloff of grip as they heat up. Real track pads give up grip more gradually as the temp rises. You probably wore them out because you were trying real hard to get grip out of them that they just couldn't give. If you want to use Hawks, try their racing pads (Blacks, Blues, one of the numbered pads).

huesmann is offline  
post #3 of 10 Old 05-05-2009, 11:27 AM
Registered User
 
85GTVince's Avatar
 
Trader Feedback: (13)
Join Date: Oct 2006
Location: Clinton Township, MI
Posts: 695
Get a real track pad before you change anything else.

HPS = High Performance Street (not track)

--Vince

+ Jalape√Īo Red 1985 Mustang GT, 347 in^3, Canfield heads, 650DP, X-Celerator, & 1-3/4" LT's
+ Tremec 3550, D&D shifter, 3.73:1 gears, & TrueTrac differential
+ EVM watts & 3-link, Homemade LCA's, & Koni SA's
+ '00 Cobra R Brembos in front and SN95 Cobra rear brakes, R58 rims, & 275/40R17 Falkens
85GTVince is offline  
Sponsored Links
Advertisement
 
post #4 of 10 Old 05-05-2009, 10:58 PM Thread Starter
Registered User
 
loudnslow98gt's Avatar
 
Trader Feedback: (5)
Join Date: Aug 2006
Location: new jersey
Posts: 763
Quote:
Originally Posted by 85GTVince View Post
Get a real track pad before you change anything else.

HPS = High Performance Street (not track)

--Vince
i know. i thought they would have been better then they were and didn't want a pad the was too harsh on my rotors. plus the car is still a DD so altho its not hard to swap pads, it would be nice to drive and race on the same pads. but i guess i cant have my cake and eat it too. ill try one of their race pads next time.

any suggestions on what ones? whats the difference between the blacks, blues, ht10's, 14's and dtc60's?

AJ Hartman
RHRPerf.com
facebook.com/rhrperformancellc/
2013, 2016-217 NASA Northeast American Iron Champion

Last edited by loudnslow98gt; 05-05-2009 at 11:00 PM.
loudnslow98gt is offline  
post #5 of 10 Old 05-06-2009, 01:24 AM
Registered User
 
Trader Feedback: (0)
Join Date: Dec 2002
Location: El Granada, California
Posts: 135
I've run almost the whole line of Hawk Pads on my HPDE car. I've recently run 3 track days on the DTC-70's, and was pleased with them. They are not too much pad for my heavy SN95 car. If you are going to use Hawk pads and switch the for the track, the HPS/DTC70 combo might work well.

If rotor life is a big factor for you, the the CarboTech's might be what you want. I've also run the XP8/10/12 on the track, and like those also. Last friday I ran the XP12 front/XP10 rear.

If you drive to the track, the Blues and HT10's will munch your rotors at street temperatures much faster than the CarboTech's.

1997 Pacific Green Cobra
100+ HPDE track days
Full MM setup
13.484 / 103.575 / 1.959
SnakePilot is offline  
post #6 of 10 Old 05-07-2009, 10:17 AM
Registered User
 
drudis's Avatar
 
Trader Feedback: (1)
Join Date: Apr 2000
Location: Livonia, MI (Detroit) USA
Posts: 3,013
I used serval pads in the past:
PF-Z's,PF01's, PF97's, Spec VR's, and currently run DTC-70's. These are my favorite.

This is for track pads (NON-street) only.

Darius Rudis

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
1989 Mustang S-trim Roadracer
drudis is offline  
post #7 of 10 Old 05-07-2009, 11:36 AM
Registered User
 
85GTVince's Avatar
 
Trader Feedback: (13)
Join Date: Oct 2006
Location: Clinton Township, MI
Posts: 695
I have run a few different pads as well. The one thing that is always true is you need a track pad for the track and a street pad for the street. You can get by with a track pad on the street if it is ONLY to drive to the track, but other than that it is not a good way to run.

I have run Porterfield R4, PF-Z, and PF-01. The PF-01 was my favorite. All 3 are very easy on the rotors. The R4's held up well, but they did not have as much friction as the others. The PF-Z's were OK, but they did not last that long. The PF-01's had a good friction level (fairly high, but not too high that it is tough o modulate or flat spots tires) and that lasted quite awhile. With any of these pads I replace my rotors due to heat checking before they show significant wear.

I was recently looking into new front pads and the Hawk DTC-60's were highly recommended. The DTC-70's have a slightly higher friction level than the DTC-60's. The two pads are very similar, but I was told to go with the 60's unless I was running R tires.

For the rear, do the Cobra swap and run a quality street pad. The Porterfield R4-S, the Hawk HPS, or just some decent brand semi-metallics will be fine.

Lastly, run some brake ducts on the front.

--Vince

+ Jalape√Īo Red 1985 Mustang GT, 347 in^3, Canfield heads, 650DP, X-Celerator, & 1-3/4" LT's
+ Tremec 3550, D&D shifter, 3.73:1 gears, & TrueTrac differential
+ EVM watts & 3-link, Homemade LCA's, & Koni SA's
+ '00 Cobra R Brembos in front and SN95 Cobra rear brakes, R58 rims, & 275/40R17 Falkens
85GTVince is offline  
post #8 of 10 Old 05-07-2009, 11:47 PM Thread Starter
Registered User
 
loudnslow98gt's Avatar
 
Trader Feedback: (5)
Join Date: Aug 2006
Location: new jersey
Posts: 763
Quote:
Originally Posted by 85GTVince View Post
I have run a few different pads as well. The one thing that is always true is you need a track pad for the track and a street pad for the street. You can get by with a track pad on the street if it is ONLY to drive to the track, but other than that it is not a good way to run.

I have run Porterfield R4, PF-Z, and PF-01. The PF-01 was my favorite. All 3 are very easy on the rotors. The R4's held up well, but they did not have as much friction as the others. The PF-Z's were OK, but they did not last that long. The PF-01's had a good friction level (fairly high, but not too high that it is tough o modulate or flat spots tires) and that lasted quite awhile. With any of these pads I replace my rotors due to heat checking before they show significant wear.

I was recently looking into new front pads and the Hawk DTC-60's were highly recommended. The DTC-70's have a slightly higher friction level than the DTC-60's. The two pads are very similar, but I was told to go with the 60's unless I was running R tires.

For the rear, do the Cobra swap and run a quality street pad. The Porterfield R4-S, the Hawk HPS, or just some decent brand semi-metallics will be fine.

Lastly, run some brake ducts on the front.

--Vince
thanks for the info. i did make some brake ducts.
https://forums.corral.net/forums/show....php?t=1114771

ill go a head and do the rear swap. do i need anyhthing else like a cobra prop valve? or since im cobra front and rear it should work out ok?

AJ Hartman
RHRPerf.com
facebook.com/rhrperformancellc/
2013, 2016-217 NASA Northeast American Iron Champion
loudnslow98gt is offline  
post #9 of 10 Old 05-10-2009, 07:25 PM Thread Starter
Registered User
 
loudnslow98gt's Avatar
 
Trader Feedback: (5)
Join Date: Aug 2006
Location: new jersey
Posts: 763
so i decided to go with the DTC-60's because im not running R comps. i also ordered up the cobra rear kit. i'll use what ever pads come loaded in the calipers for now. i have another track day at NJMP on June 19th so i'll be sure to post back some info.

AJ Hartman
RHRPerf.com
facebook.com/rhrperformancellc/
2013, 2016-217 NASA Northeast American Iron Champion
loudnslow98gt is offline  
post #10 of 10 Old 05-10-2009, 09:25 PM
Registered User
 
ac427cobra's Avatar
 
Trader Feedback: (1)
Join Date: Mar 2004
Location: In the Race Shop
Posts: 48
Quote:
Originally Posted by loudnslow98gt View Post
so i did an HPDE with the SCDA and had over 5 hours of track time. i put Hawk HPS pads on the front last thursday. i left the rears alone. about 5 hours into it, my front brakes were down to the backing plates.(and thats with the first 2 sessions in the wet). but my rear pads, which have been on since my first event last summer, still have about 1/2 life on them. so my front brakes are doing the lions share of my braking. whats the best way to get my rear brakes to help out more so i don't keep destroying my front brakes after each event? should i finish the cobra brake swap and put them on the rear? and would i need a prop valve? and next time ill try the HP+ on the front.
Most Mustangs, as a general rule will go through 2-4 sets of front pads for every rear set of pads.


Bruce
2000 Cobra R, 2004 Mach II
2012 Boss 302S (NASA AI track record holder Road America 2011)
2014 Shelby GT500
ac427cobra is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forums : Corral.net Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Polished PBR front brakes and Rear Cobra brakes 89WhiteGTRagtop Suspension 12 03-10-2009 01:59 AM
Bremob Cobra R front brakes/ Cobra rear brakes BlownGT88' Suspension 3 09-11-2008 09:15 PM
01 cobra polished rims/tires, 4, 01 cobra rear bumper, rear brakes, trunk lid.etc wantcobra Exterior Parts 24 01-13-2005 10:24 PM
Dissapointing day working on brakes - prop valve Q 92Pony General Mustang Tech 9 10-26-2004 11:52 AM
Those with adjustable prop. valves, please read. 91fiveoh General Mustang Tech 5 05-20-2003 10:38 AM

Posting Rules  
You may post new threads
You may 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome