Carbotech and Corvette...
Racer
Joined: Apr 2008
Posts: 437
Likes: 0
From: Toronto Ontario
Sorry for the delay. The pads worked great. They bedded nicely and stopped the car very well all day long. I wouldn't say that I noticed a huge difference in bite vs. stock pads, but they definitely held up a lot better. There was minimal wear on the Carbo pads after the day and the rotors seemed to cope fine. I *am* getting hairline cracks around the drilled holes, but I wouldn't attribute that to the Carbotech pads.
Pro
Joined: Jan 2000
Posts: 714
Likes: 10
From: Owasso OK
Stoptech ST40 on C5
Danny
I've only used the XP10s/XP8 for my car and they work very well. However every set i've ever run always produce an overhang on the pad where the tops (outer edge) do not meet up with the rotor (fronts only - ST). I was concerned about this on the first set but after running multiple sets they all do this and it hasn't had an impact on the performance. I just don't take them down as far as i do the rears as i'm concerned about ill effects for the last 1/4 of the pad so i'm not getting full pad life use. This has always been an issue with the life of the pad so I've considered other options as i use your pads up too quickly. Have you changed your stoptech pads recently (w/in last year)?
Thanks!
I've only used the XP10s/XP8 for my car and they work very well. However every set i've ever run always produce an overhang on the pad where the tops (outer edge) do not meet up with the rotor (fronts only - ST). I was concerned about this on the first set but after running multiple sets they all do this and it hasn't had an impact on the performance. I just don't take them down as far as i do the rears as i'm concerned about ill effects for the last 1/4 of the pad so i'm not getting full pad life use. This has always been an issue with the life of the pad so I've considered other options as i use your pads up too quickly. Have you changed your stoptech pads recently (w/in last year)?
Thanks!
Thread Starter
Supporting Vendor
Joined: May 2008
Posts: 115
Likes: 1
Danny
I've only used the XP10s/XP8 for my car and they work very well. However every set i've ever run always produce an overhang on the pad where the tops (outer edge) do not meet up with the rotor (fronts only - ST). I was concerned about this on the first set but after running multiple sets they all do this and it hasn't had an impact on the performance. I just don't take them down as far as i do the rears as i'm concerned about ill effects for the last 1/4 of the pad so i'm not getting full pad life use. This has always been an issue with the life of the pad so I've considered other options as i use your pads up too quickly. Have you changed your stoptech pads recently (w/in last year)?
Thanks!
I've only used the XP10s/XP8 for my car and they work very well. However every set i've ever run always produce an overhang on the pad where the tops (outer edge) do not meet up with the rotor (fronts only - ST). I was concerned about this on the first set but after running multiple sets they all do this and it hasn't had an impact on the performance. I just don't take them down as far as i do the rears as i'm concerned about ill effects for the last 1/4 of the pad so i'm not getting full pad life use. This has always been an issue with the life of the pad so I've considered other options as i use your pads up too quickly. Have you changed your stoptech pads recently (w/in last year)?
Thanks!
Wasserott,
What rotors are you using with your Stop-Tech calipers? I haven't heard of our pads over hanging on the Stop-Tech calipers, but I will check into it for you.
Yes, we have made some changes to both the ST-40 and ST-60 pads. You can go all the way down to the backing plate. Don't worry about the rivets because they are made of brass and they will not hurt your rotors at all.
The pedal feel will be a little different when our pads are at 90% vs. 25%, but the performance is the same. One of our biggest advantages is the consistency of our compounds throughout the life of the pad.
Please let me know if you have any other questions or comments.
Thank You,
__________________
Danny Puskar
G-LOC Brakes
503 Performance Road
Mooresville, NC 28115
844-927-2537
danny@g-locbrakes.com
Danny Puskar
G-LOC Brakes
503 Performance Road
Mooresville, NC 28115
844-927-2537
danny@g-locbrakes.com
Racer
Joined: Apr 2008
Posts: 437
Likes: 0
From: Toronto Ontario
Thanks.
Thread Starter
Supporting Vendor
Joined: May 2008
Posts: 115
Likes: 1
fire_n_ice,
This is true for all of our pads in all of our compounds. But, if you're talking about our C4, C5, or C6 pads, we mold all of those now so there are no rivets.
We recommend you that you change them when you get down to 1/16th of a inch.
Burning Brakes
Joined: Oct 2004
Posts: 1,001
Likes: 0
From: Naples Florida
Actually, the tampering issue with the C5 is in the spindle not the floating caliper. During the C5 development at the NurburgRing. Brake pad tapering was an apparent issue. It was discovered that the spindle was not stiff enough to prevent "knock back" as it "flexed" under hard braking, especially with multi-piston fixed calipers. Replacing the C5 spindles with C6 spindles will negate this issue. The C6 spindle is a direct bolt on that is slightly thicker and much stiffer than the C5.
Last edited by rudyarias; Jul 3, 2008 at 11:56 PM.
Burning Brakes
Joined: Oct 2004
Posts: 1,001
Likes: 0
From: Naples Florida
The car squats not nose dive under hard braking thus allowing me to out brake GT3s
The downside is a non issue with me but to those who need A/H as a safety net, it is disabled and the car is not stable on ice or snow.
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Drifting
Joined: Nov 2005
Posts: 1,745
Likes: 35
From: Turlock CA
That is correct. My situation is a tad different, I had the C5R brake calibration flashed into my electronic ABS/Bias control units. I do go through both front and rears at the same time with my C6Z06 (J56) Calipers on both my C5 Z06s. The upside is that the padlettes do last much longer than they did with the street ABS/Bias calibration. I have even brake dust on front and rear wheels The car squats not nose dive under hard braking thus allowing me to out brake GT3s The downside is a non issue with me but to those who need A/H as a safety net, it is disabled and the car is not stable on ice or snow.
The car squats not nose dive under hard braking thus allowing me to out brake GT3s The downside is a non issue with me but to those who need A/H as a safety net, it is disabled and the car is not stable on ice or snow.--Dan
Burning Brakes
Joined: Oct 2004
Posts: 1,001
Likes: 0
From: Naples Florida
Contact GM Racing for the C6R ABS/Bias calibration which is downloaded and installed by your dealer. This will disable the A/H and make the car VERY UNSTABLE on ice, snow or very slick conditions. This is because the bias is at 55/45 with the rears engaging a millisecond before the fronts. The street bias of 80/20 allows the car to be very stable under slick conditions. I am not sure how much of this will negate your existing warranty or GMPP.
The C5R ABS/Bias calibration is not yet available but was told it will be in the near future. My 2002 C5 Z06 was done as a street/track mule with the final version of the calibration flashed into both of my C5 Z06s last December. An added note, this ABS/Bias calibration for the C5 is set to wheel diameter to be squared on all fours (295/35R18) not the O.E.M. staggered (265/40R17 & 295/35R18) wheel diameter. You WILL NOT have stable ABS/Bias brake control on a staggered wheel diameter with this calibration.
Last edited by rudyarias; Jul 4, 2008 at 01:44 AM.
Drifting
Joined: Nov 2005
Posts: 1,745
Likes: 35
From: Turlock CA
All C5 (from 2002) & C6 brake bias/pressure are controlled via the electronic ABS control unit. The 2001 C5 Z06/Coupe brake bias are mechanical valve control. The racing ABS/Bias calibration is not a "HP Tuner/LS1 Edit" thing. Its a GM Racing "Thing".
Contact GM Racing for the C6R ABS/Bias calibration which is downloaded and installed by your dealer. This will disable the A/H and make the car VERY UNSTABLE on ice, snow or very slick conditions. This is because the bias is at 55/45 with the rears engaging a millisecond before the fronts. The street bias of 80/20 allows the car to be very stable under slick conditions. I am not sure how much of this will negate your existing warranty or GMPP.
The C5R ABS/Bias calibration is not yet available but was told it will be in the near future. My 2002 C5 Z06 was done as a street/track mule with the final version of the calibration flashed into both of my C5 Z06s last December. An added note, this ABS/Bias calibration for the C5 is set to wheel diameter to be squared on all fours (295/35R18) not the O.E.M. staggered (265/40R17 & 295/35R18) wheel diameter. You WILL NOT have stable ABS/Bias brake control on a staggered wheel diameter with this calibration.
Contact GM Racing for the C6R ABS/Bias calibration which is downloaded and installed by your dealer. This will disable the A/H and make the car VERY UNSTABLE on ice, snow or very slick conditions. This is because the bias is at 55/45 with the rears engaging a millisecond before the fronts. The street bias of 80/20 allows the car to be very stable under slick conditions. I am not sure how much of this will negate your existing warranty or GMPP.
The C5R ABS/Bias calibration is not yet available but was told it will be in the near future. My 2002 C5 Z06 was done as a street/track mule with the final version of the calibration flashed into both of my C5 Z06s last December. An added note, this ABS/Bias calibration for the C5 is set to wheel diameter to be squared on all fours (295/35R18) not the O.E.M. staggered (265/40R17 & 295/35R18) wheel diameter. You WILL NOT have stable ABS/Bias brake control on a staggered wheel diameter with this calibration.
--Dan
Race Director
Joined: Jun 2003
Posts: 14,051
Likes: 9
From: Houston TX
Are you refering to the BPMV (Brake Pressure Modulator Valve)? Is this componet not directly controlled by the EBCM and ABS? Or are you suggesting that the brake bias is mechanically restricted at the master cylinder?
Drifting
Joined: Jun 2004
Posts: 1,374
Likes: 0
From: TN
Remember Corvette Forum members get a 10% discount. Just Give Danny a call. He will be able to answer all your questions. 1-877-899-5024
Racer
Joined: Apr 2008
Posts: 437
Likes: 0
From: Toronto Ontario
All C5 (from 2002) & C6 brake bias/pressure are controlled via the electronic ABS control unit. The 2001 C5 Z06/Coupe brake bias are mechanical valve control. The racing ABS/Bias calibration is not a "HP Tuner/LS1 Edit" thing. Its a GM Racing "Thing".
Contact GM Racing for the C6R ABS/Bias calibration which is downloaded and installed by your dealer. This will disable the A/H and make the car VERY UNSTABLE on ice, snow or very slick conditions. This is because the bias is at 55/45 with the rears engaging a millisecond before the fronts. The street bias of 80/20 allows the car to be very stable under slick conditions. I am not sure how much of this will negate your existing warranty or GMPP.
The C5R ABS/Bias calibration is not yet available but was told it will be in the near future. My 2002 C5 Z06 was done as a street/track mule with the final version of the calibration flashed into both of my C5 Z06s last December. An added note, this ABS/Bias calibration for the C5 is set to wheel diameter to be squared on all fours (295/35R18) not the O.E.M. staggered (265/40R17 & 295/35R18) wheel diameter. You WILL NOT have stable ABS/Bias brake control on a staggered wheel diameter with this calibration.
Contact GM Racing for the C6R ABS/Bias calibration which is downloaded and installed by your dealer. This will disable the A/H and make the car VERY UNSTABLE on ice, snow or very slick conditions. This is because the bias is at 55/45 with the rears engaging a millisecond before the fronts. The street bias of 80/20 allows the car to be very stable under slick conditions. I am not sure how much of this will negate your existing warranty or GMPP.
The C5R ABS/Bias calibration is not yet available but was told it will be in the near future. My 2002 C5 Z06 was done as a street/track mule with the final version of the calibration flashed into both of my C5 Z06s last December. An added note, this ABS/Bias calibration for the C5 is set to wheel diameter to be squared on all fours (295/35R18) not the O.E.M. staggered (265/40R17 & 295/35R18) wheel diameter. You WILL NOT have stable ABS/Bias brake control on a staggered wheel diameter with this calibration.
Does anybody know if this will indeed void the warranty? I am highly interested to know.
Burning Brakes
Joined: Jul 2004
Posts: 767
Likes: 0
From: MD
St. Jude Donor '10-'11
Actually, the tampering issue with the C5 is in the spindle not the floating caliper. During the C5 development at the NurburgRing. Brake pad tapering was an apparent issue. It was discovered that the spindle was not stiff enough to prevent "knock back" as it "flexed" under hard braking, especially with multi-piston fixed calipers. Replacing the C5 spindles with C6 spindles will negate this issue. The C6 spindle is a direct bolt on that is slightly thicker and much stiffer than the C5.
I *assume* this is the base C6 spindle and that the C5-size rotors can continue to be used?
If so, sounds like a no-brainer mod ...
TIA
DennyM
Burning Brakes
Joined: Aug 2003
Posts: 1,100
Likes: 0
From: Los Gatos CA
Rudy - do you know if that 80/20 and 55/45 ratio is the final ratio, including front to rear piston area differences? If so, is the cXr calibration designed for the street ratios or the calipers the race cars use? Thanks. This does say that Danny was right with putting front calipers on all four corners for his car in one-lap...that gets the final ratio somewhere in the middle...sans parking brake though.
(these numbers assume the final ratios Rudy gave take both the bias adjustment and piston areas into account)
STOCK
front area: 3.835 bias: 80% --> stock valve front:rear bias: 2.508:1
rear area: 2.405 bias: 20%
front:rear ratio: 4:1
RACE
front area: 3.835 bias: 55% --> race valve front:rear bias: 0.755:1
rear area: 2.405 bias: 45%
front:rear ratio: 1.222:1
STOCK w/ fronts on all corners
front area: 3.835 bias: TBD --> stock valve front:rear bias of 2.508:1
rear area: 3.835 bias: TBD
front:rear ratio: 2.508:1
(these numbers assume the final ratios Rudy gave take both the bias adjustment and piston areas into account)
STOCK
front area: 3.835 bias: 80% --> stock valve front:rear bias: 2.508:1
rear area: 2.405 bias: 20%
front:rear ratio: 4:1
RACE
front area: 3.835 bias: 55% --> race valve front:rear bias: 0.755:1
rear area: 2.405 bias: 45%
front:rear ratio: 1.222:1
STOCK w/ fronts on all corners
front area: 3.835 bias: TBD --> stock valve front:rear bias of 2.508:1
rear area: 3.835 bias: TBD
front:rear ratio: 2.508:1
All C5 (from 2002) & C6 brake bias/pressure are controlled via the electronic ABS control unit. The 2001 C5 Z06/Coupe brake bias are mechanical valve control. The racing ABS/Bias calibration is not a "HP Tuner/LS1 Edit" thing. Its a GM Racing "Thing".
Contact GM Racing for the C6R ABS/Bias calibration which is downloaded and installed by your dealer. This will disable the A/H and make the car VERY UNSTABLE on ice, snow or very slick conditions. This is because the bias is at 55/45 with the rears engaging a millisecond before the fronts. The street bias of 80/20 allows the car to be very stable under slick conditions. I am not sure how much of this will negate your existing warranty or GMPP.
The C5R ABS/Bias calibration is not yet available but was told it will be in the near future. My 2002 C5 Z06 was done as a street/track mule with the final version of the calibration flashed into both of my C5 Z06s last December. An added note, this ABS/Bias calibration for the C5 is set to wheel diameter to be squared on all fours (295/35R18) not the O.E.M. staggered (265/40R17 & 295/35R18) wheel diameter. You WILL NOT have stable ABS/Bias brake control on a staggered wheel diameter with this calibration.
Contact GM Racing for the C6R ABS/Bias calibration which is downloaded and installed by your dealer. This will disable the A/H and make the car VERY UNSTABLE on ice, snow or very slick conditions. This is because the bias is at 55/45 with the rears engaging a millisecond before the fronts. The street bias of 80/20 allows the car to be very stable under slick conditions. I am not sure how much of this will negate your existing warranty or GMPP.
The C5R ABS/Bias calibration is not yet available but was told it will be in the near future. My 2002 C5 Z06 was done as a street/track mule with the final version of the calibration flashed into both of my C5 Z06s last December. An added note, this ABS/Bias calibration for the C5 is set to wheel diameter to be squared on all fours (295/35R18) not the O.E.M. staggered (265/40R17 & 295/35R18) wheel diameter. You WILL NOT have stable ABS/Bias brake control on a staggered wheel diameter with this calibration.
Burning Brakes
Joined: Feb 2008
Posts: 1,228
Likes: 9
From: Crossville TN
Danny... I just wanted to get your take on what I'm setting my car up for and see what you think.
My Z06 is gonna be setup exclusively for autoX. This year I'm just getting seat time and getting ready for some national events next year. I'm running the Faulken Azenis RT-615's and the AX6 pads work great for them.
I'm getting ready to throw on some Hoosier A6's with CCW Classics... but I'm really leaning on using my AX8's with them and see how they do. Do you think that the AX8's would work better than the AX6's for the Hoosier's? I figured they would give me just a bit more bite and since I'm gonna be running sticky tires, the AX8's may shine a lil more and really give me some good stopping power. What are your thoughts on that? Thanks.
My Z06 is gonna be setup exclusively for autoX. This year I'm just getting seat time and getting ready for some national events next year. I'm running the Faulken Azenis RT-615's and the AX6 pads work great for them.
I'm getting ready to throw on some Hoosier A6's with CCW Classics... but I'm really leaning on using my AX8's with them and see how they do. Do you think that the AX8's would work better than the AX6's for the Hoosier's? I figured they would give me just a bit more bite and since I'm gonna be running sticky tires, the AX8's may shine a lil more and really give me some good stopping power. What are your thoughts on that? Thanks.