Does anyone have any braking questions. - Page 86 - CorvetteForum - Chevrolet Corvette Forum Discussion

Notices
Autocrossing & Roadracing Suspension Setup for Track Corvettes, Camber/Caster Adjustments, R-Compound Tires, Race Slicks, Tips on Driving Technique, Events, Results
Sponsored by:
Sponsored by:

Does anyone have any braking questions.

Reply

 
 
 
Old 05-27-2018, 08:32 AM
  #1701  
badhabit_wb
CF Senior Member
 
Member Since: Sep 2014
Location: in the country North Carolina
Posts: 1,853
Thanked 160 Times in 142 Posts
Default

Originally Posted by Poor-sha View Post
In for post 1700!

I must admit that threads this long make it tough to find info. Personally I'd rather have shorter more focused threads (i.e. a thread on rotor hardware and a thread on brake burnishing). Does anyone actually come in and read the entire thread from the beginning?

The one thing I like about this thread is that I know most of the people contributing will offer great info.
I'm still trying to decide what to do about a big brake kit. I've got 7 track days on the st-43 pads and they look good for Tuesday. I read yesterday that's about what you're getting on the 25mm pads you're running. My problem is the first set of rotors with those pads lasted less than 3 track days before I had a crack. I've got 3 track days on these and they still look pretty good so maybe they're going to last longer. I've had no discoloration on the yellow rotors and the car stops well. I just don't want to drop 10 grand and not see much of an improvement.
badhabit_wb is offline  
Reply With Quote
Old 05-28-2018, 02:37 PM
  #1702  
Poor-sha
Track Rat
Support Corvetteforum!
 
Poor-sha's Avatar
 
Member Since: Oct 2006
Posts: 4,892
Thanked 1,727 Times in 723 Posts
Default

Originally Posted by badhabit_wb View Post
I'm still trying to decide what to do about a big brake kit. I've got 7 track days on the st-43 pads and they look good for Tuesday. I read yesterday that's about what you're getting on the 25mm pads you're running. My problem is the first set of rotors with those pads lasted less than 3 track days before I had a crack. I've got 3 track days on these and they still look pretty good so maybe they're going to last longer. I've had no discoloration on the yellow rotors and the car stops well. I just don't want to drop 10 grand and not see much of an improvement.
I can't recommend the AP Racing kit enough. I don't think you need the rear kit but the front kit really makes a huge difference. I don't have any first hand experience with the PFC pads though and it's tough to equate brake life between drivers. For starters, most events I'm running 7-8 sessions not the typical 4 sessions - I know you're at the VIR Club events though so you may be getting more too. The other thing is that I am *very* hard on brakes and that necessarily creates faster wear.

If you don't want to drop the money on front and rear, just get the front kit and run that for a while. The main reason for getting the rear kit is just to save a little unsprung weight and for style points.
Poor-sha is offline  
Reply With Quote
The Following User Says Thank You to Poor-sha For This Useful Post:
[email protected] (05-29-2018)
Old 05-28-2018, 07:18 PM
  #1703  
badhabit_wb
CF Senior Member
 
Member Since: Sep 2014
Location: in the country North Carolina
Posts: 1,853
Thanked 160 Times in 142 Posts
Default

Originally Posted by Poor-sha View Post
I can't recommend the AP Racing kit enough. I don't think you need the rear kit but the front kit really makes a huge difference. I don't have any first hand experience with the PFC pads though and it's tough to equate brake life between drivers. For starters, most events I'm running 7-8 sessions not the typical 4 sessions - I know you're at the VIR Club events though so you may be getting more too. The other thing is that I am *very* hard on brakes and that necessarily creates faster wear.

If you don't want to drop the money on front and rear, just get the front kit and run that for a while. The main reason for getting the rear kit is just to save a little unsprung weight and for style points.
I'll probably end up getting front and rear because it will drive me crazy looking at the yellow in back and black in front. I'm using Raybestos but they really haul the car down a lot faster than the stock pads.
I was using xp-12 carbotech's before and the st-43's have a lot more bite and are lasting twice as long. I'm going to run at VIR again tomorrow if it doesn't rain so maybe that will help me decide. If I have any brake issues at all I'm going to go ahead and call Jeff. The rotors that cracked in 3 days got me nervous.
Thanks for the help.
badhabit_wb is offline  
Reply With Quote
The Following User Says Thank You to badhabit_wb For This Useful Post:
[email protected] (05-29-2018)
Old 05-28-2018, 09:18 PM
  #1704  
fatbillybob
CF Senior Member
 
fatbillybob's Avatar
 
Member Since: Dec 2004
Posts: 2,816
Thanked 93 Times in 71 Posts
Default C7 Brake questions?

To the vendors what is available for C7's?

C7 Z51's already have 4 piston Brembo calipers? Are they good to race on? Can we just add aftermarket floating rotors and race pads and be good to go with factory horsepower on road courses? I'm thinking SCCA T1 limited or full prep class as a national competitor racing around the country.

Can the 6 piston Brembo's off the C7Z06 bolt right on using same Z51 rear calipers and Z51 master cylinder? Is going to C7Z06 1" larger rotors a big plus or just extra rotating mass on a stock powered Z51?

Thanks!
fatbillybob is offline  
Reply With Quote
Old 05-29-2018, 10:29 AM
  #1705  
KNSBrakes
Supporting Vendor
 
KNSBrakes's Avatar
 
Member Since: Jul 2007
Location: Raleigh NC
Posts: 15,174
Thanked 67 Times in 62 Posts
Default

Originally Posted by fatbillybob View Post
To the vendors what is available for C7's?

C7 Z51's already have 4 piston Brembo calipers? Are they good to race on? Can we just add aftermarket floating rotors and race pads and be good to go with factory horsepower on road courses? I'm thinking SCCA T1 limited or full prep class as a national competitor racing around the country.

Can the 6 piston Brembo's off the C7Z06 bolt right on using same Z51 rear calipers and Z51 master cylinder? Is going to C7Z06 1" larger rotors a big plus or just extra rotating mass on a stock powered Z51?

Thanks!
The C7 Z51 brakes are better than C5/C6 stock brakes but the car is still under-braked if racing or tracking hard on race tires. Big tires, big power so big heat.

Pad and rotor wear is high and the brake fluid boils easily.

The front pad shape is very common so there are many options. The staked on weights are unnecessary.


The front rotors are not common yet. GM has 1 piece and DBA/KNS has 1 and 2 piece. Other aftermarket rotors seem a bit slow coming probably since GM started with the co-cast 2 piece.

The rear pad shape was new but there are suitable options now just not as many as the front shape.

The rear rotors are also the co-cast. DBA/KNS have 1 piece replacements.

Last edited by KNSBrakes; 05-29-2018 at 10:31 AM.
KNSBrakes is offline  
Reply With Quote
Old 05-29-2018, 04:35 PM
  #1706  
Todd TCE
Supporting Vendor
 
Todd TCE's Avatar
 
Member Since: Jun 2008
Location: tempe Arizona
Posts: 1,929
Thanked 56 Times in 52 Posts
Default

Originally Posted by fatbillybob View Post
To the vendors what is available for C7's?

C7 Z51's already have 4 piston Brembo calipers? Are they good to race on? Can we just add aftermarket floating rotors and race pads and be good to go with factory horsepower on road courses? I'm thinking SCCA T1 limited or full prep class as a national competitor racing around the country.

Can the 6 piston Brembo's off the C7Z06 bolt right on using same Z51 rear calipers and Z51 master cylinder? Is going to C7Z06 1" larger rotors a big plus or just extra rotating mass on a stock powered Z51?

Thanks!

Wilwood has the popular 14.25" Aero kits available for them as well as 15" front kits if wheel space allows. The C7 has a different mount spec then the C5/6 I do believe so swapping from the earlier car is out of the question.

Depending up on budget and options you can do a full four wheel kit, shipped, for about $3500.

Custom options; colors, thermlock pistons etc all available as well.
__________________
TCE
Your one stop...for Wilwood Brakes!



* CUSTOM * Corvette * Lightning * Impala SS * Focus ST * Marauder * 350/370Z * MINI * Challenger * Crown Vic * Super Duty * Flex/SHO * Mustang * WRX * ...and more!

Last edited by Todd TCE; 05-29-2018 at 04:36 PM.
Todd TCE is offline  
Reply With Quote
Old 05-29-2018, 04:51 PM
  #1707  
[email protected]
Supporting Vendor
 
JRitt@essex's Avatar
 
Member Since: Oct 2009
Location: Charlotte NC
Posts: 1,161
Thanked 150 Times in 109 Posts
Default

We have 2-piece AP Racing J Hook discs for the C7 Z51, front and rear.

We also have an array of complete front and rear brake kits.

You can see all of our options here:

https://www.essexparts.com/my-vehicl...t/Corvette/Z51

I'd be happy to walk you through some options depending on your budget and goals for the car. Feel free to shoot me an email or call me at 704-824-six zero three zero.

Thanks!


Originally Posted by fatbillybob View Post
To the vendors what is available for C7's?

C7 Z51's already have 4 piston Brembo calipers? Are they good to race on? Can we just add aftermarket floating rotors and race pads and be good to go with factory horsepower on road courses? I'm thinking SCCA T1 limited or full prep class as a national competitor racing around the country.

Can the 6 piston Brembo's off the C7Z06 bolt right on using same Z51 rear calipers and Z51 master cylinder? Is going to C7Z06 1" larger rotors a big plus or just extra rotating mass on a stock powered Z51?

Thanks!
JRitt@essex is offline  
Reply With Quote
Old 05-29-2018, 08:24 PM
  #1708  
badhabit_wb
CF Senior Member
 
Member Since: Sep 2014
Location: in the country North Carolina
Posts: 1,853
Thanked 160 Times in 142 Posts
Default

Jeff just want to thank you for your advice and help today. Can't wait to get it all installed. Hopefully I can maintain my sanity when I do the rear.

Sean thanks for giving me another push. I went ahead and ordered front and rear. Might as well do it all at the same time.
badhabit_wb is offline  
Reply With Quote
The Following User Says Thank You to badhabit_wb For This Useful Post:
Poor-sha (05-29-2018)
Old 08-07-2018, 09:00 AM
  #1709  
Ed'sC7
CF Senior Member
 
Ed'sC7's Avatar
 
Member Since: Mar 2015
Location: LI New York
Posts: 281
Thanked 16 Times in 16 Posts
Default Which pads

I have a question regarding brake pads for a 2017 GS with Carbon Ceramic rotors. I currently track this car and use the OE Delco pads. Are there better pads at less cost that i can use instead of these expensive OE pads? Even if just switching out for track days.

Ed
Ed'sC7 is offline  
Reply With Quote
Old 08-07-2018, 09:55 AM
  #1710  
Bill Dearborn
Tech Contributor
 
Bill Dearborn's Avatar
 
Member Since: Oct 1999
Location: Charlotte (formerly Endicott, NY) NC
Posts: 31,763
Thanked 2,741 Times in 1,881 Posts
Default

Originally Posted by Ed'sC7 View Post
I have a question regarding brake pads for a 2017 GS with Carbon Ceramic rotors. I currently track this car and use the OE Delco pads. Are there better pads at less cost that i can use instead of these expensive OE pads? Even if just switching out for track days.

Ed
Nothing lower cost but there are Pagid Race Pads made to work with Ceramic Rotors:
Front are Pagid U8091
Rear are Pagid U4906


Pagid Compound for the OEM Cup2 Tires is RSC-1.
If you look through this thread you will see that JohnnyC posted that info a couple of years ago.

Have you checked Amazon Prices for the stock replacement AC Delco Pads? If you have been buying at the dealership Amazon may give your the price break you are looking for.

Front Rotor Part Number: 20981825 (ROTOR, RIGHT & Left)
Front Brake Pads Part Number: 23198733 (FRONT PADS) superseded by P/N
23316708
ACDelco Part Number is 171-1186


C6 ZR1 Front Brake Pad ACDelco 171-1010 GM OEM Front Disc Brake Pad Kit: Fits C7 but Wear Sensor wires are too short and have to be spliced to old C7 wires to work.
C6 ZR1 Front Rotor will fit C7 Z06/Z07 Front === ACDelco 177-1120 GM Original Equipment Front Disc Brake Rotor OEM Part #: 22805791


C7
Rear Brake Rotor Part Number: 20981826 (ROTOR, RIGHT & Left)

Rear Brake Pad Part Number: 23198750 (REAR PADS) ACDelco 171-1143 GM Original Equipment Rear Disc Brake Pad Set

Bill
Bill Dearborn is offline  
Reply With Quote
Old 08-07-2018, 10:52 AM
  #1711  
Ed'sC7
CF Senior Member
 
Ed'sC7's Avatar
 
Member Since: Mar 2015
Location: LI New York
Posts: 281
Thanked 16 Times in 16 Posts
Default

Thanks Bill. I appreciate the info...I have seen them a little cheaper on Amazon. Just thought folks maybe using a cheaper alternative that performs just as good.

Ed
Ed'sC7 is offline  
Reply With Quote
Old 09-14-2018, 05:41 AM
  #1712  
Coolvet
CF Senior Member
 
Coolvet's Avatar
 
Member Since: Jan 2003
Location: Sydney NSW
Posts: 321
Thanks: 0
Thanked 0 Times in 0 Posts
Default

This question is off topic but I'm wondering if you can give me some guidance of what master cylinder sizes I should install on a 1969 C3 Corvette 427 race car. The car has 4 spot calipers all round with 1 7/8" pistons on the front and 1 3/8" pistons on the rear. I am fitting a dual master cylinder system with adjustable bias, so what cylinder sizes should I install?

Thanks

Coolvet
Coolvet is offline  
Reply With Quote
Old 09-14-2018, 08:37 AM
  #1713  
badhabit_wb
CF Senior Member
 
Member Since: Sep 2014
Location: in the country North Carolina
Posts: 1,853
Thanked 160 Times in 142 Posts
Default

I'd just use a stock master cylinder for that year model.

Last edited by badhabit_wb; 09-14-2018 at 06:46 PM.
badhabit_wb is offline  
Reply With Quote
Old 09-14-2018, 04:55 PM
  #1714  
mikeCsix
CF Senior Member
Support Corvetteforum!
 
mikeCsix's Avatar
 
Member Since: Jul 2010
Location: Bellevue, Wa/Surprise, Az
Posts: 2,334
Thanked 109 Times in 96 Posts
Default

Stock sizes would be a good start.

Last edited by mikeCsix; 09-14-2018 at 04:58 PM.
mikeCsix is offline  
Reply With Quote
Old 09-15-2018, 10:41 AM
  #1715  
Todd TCE
Supporting Vendor
 
Todd TCE's Avatar
 
Member Since: Jun 2008
Location: tempe Arizona
Posts: 1,929
Thanked 56 Times in 52 Posts
Default

Pretty obvious that nobody is reading what you wrote.

Bore sizes will be based on a number of factors. One of the main ones being how hard you want to push.

Off the top of my head....a 1" front and 3/4 or 13/16 rear seems about right. Guessing a bit that should be about 50/50 maybe to allow the adjuster to come into play. That's a pretty big split (like the piston sizes) so be sure there's no pivot binding. Or consider larger bore rear calipers requiring less line pressure.

Overall figure a larger pair means you push harder. A smaller pair push with less effort.

While I did not spend any time on it try this;
http://www.tceperformanceproducts.com/dual-bias-calc/
__________________
TCE
Your one stop...for Wilwood Brakes!



* CUSTOM * Corvette * Lightning * Impala SS * Focus ST * Marauder * 350/370Z * MINI * Challenger * Crown Vic * Super Duty * Flex/SHO * Mustang * WRX * ...and more!

Last edited by Todd TCE; 09-15-2018 at 10:45 AM.
Todd TCE is offline  
Reply With Quote
Old 09-17-2018, 09:25 PM
  #1716  
nickpe
CF Senior Member
 
Member Since: Jan 2007
Location: bethlehem PA
Posts: 240
Thanks: 0
Thanked 5 Times in 2 Posts
Default

can i replace my c4 front brakes with c5...if so what do i need
nickpe is offline  
Reply With Quote
Old 09-18-2018, 03:54 AM
  #1717  
X25
Sr.Random input generator
Support Corvetteforum!
 
X25's Avatar
 
Member Since: Jan 2008
Location: Redmond, WA
Posts: 3,607
Thanked 309 Times in 249 Posts
Default

Originally Posted by fatbillybob View Post
To the vendors what is available for C7's?

C7 Z51's already have 4 piston Brembo calipers? Are they good to race on? Can we just add aftermarket floating rotors and race pads and be good to go with factory horsepower on road courses? I'm thinking SCCA T1 limited or full prep class as a national competitor racing around the country.

Can the 6 piston Brembo's off the C7Z06 bolt right on using same Z51 rear calipers and Z51 master cylinder? Is going to C7Z06 1" larger rotors a big plus or just extra rotating mass on a stock powered Z51?

Thanks!
https://www.corvetteforum.com/forums...-150-pads.html
X25 is offline  
Reply With Quote
 
 
 


Thread Tools
Search this Thread
Quick Reply: Does anyone have any braking questions.


Sponsored Ads
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: