This is my first post with a lot of contend, so please bear with me.
2009 GTSC
ST XTA Coilovers, single adjustable (rebound) Set at 10 front and 2 back, on a scale of 0-16, 0 being full soft and 16 being full hard.
Strano front and rear swaybars, front full stiff, rear full soft.
Camber plates, set at -3, toe -.07.
JLT CAI, with 93 tune.
18x11 wheels, I in spacers in front, with 285, 200tw tires.
2012 GT performance package front brakes.
G-LOC R16 front, R8 rear.
SS brake lines.
STR 600 brake fluid.
4in brake cooling ducts.
Corner balanced.
This is not a daily driver, only time I drive it on the street is to get gas or go to a local Autox. Primary goal is SCCA T3 (That’s why the 285 tires) and Autox between track events.
I have been doing autox and track day stuff for about 5 years. Started the first year with everything stock. The next year upgraded to 14in brakes with R10 in front and 18x10 wheels with 340tw tires. All the upgrades have been added a little each year, but my primary concern has always been the brakes. They have never been consistent since I put the 14in brakes on. I am always getting brake fade and or excessive pedal travel. There are some other things I have questions on, but the brakes are number one.
I ran VIR (first time) about 6 weeks ago and lost it in turn one twice when the brakes would not grab. Checked the system for any air and all was good. Therefore, I just took it easy the rest of the weekend. Being the track was new to me, I could not determine if it was the car or me. My best time for that weekend was 2:30.4.
Last weekend went to NCCAR. I have run NCCAR 10+ times, so I am comfortable with this track. During the first session, the brake pedal travel started getting longer and longer. By the end of the day it felt like the pedal was at the floor by the time the brakes really started to grab. It stayed this way for the rest of the weekend. In the past, even with the pedal travel getting longer, with R10s in the front, I could brake at the 300 mark and make a smooth transition at turn 11 (Braking zone of 120-130 to 25-35). With the R16, I was braking at the 500 marker. I tried to brake at the 300 marker and it just did not feel right so I stuck with the 500 marker. This also creates a problem when I just want to “tap” the brakes to set the car prior to corner entry at turn 7. Feels like a long pedal travel before I get the brakes to respond.
Once the long pedal travel starts, it stays this way until everything cools off and I bleed the brakes, but I never get any air out. I have checked everything I can think of with the brakes. The brake booster checks good. No system leaks. If this is something to be expected, so be it, I will learn to work with it. Any thoughts on what I may need to do.
2009 GTSC
ST XTA Coilovers, single adjustable (rebound) Set at 10 front and 2 back, on a scale of 0-16, 0 being full soft and 16 being full hard.
Strano front and rear swaybars, front full stiff, rear full soft.
Camber plates, set at -3, toe -.07.
JLT CAI, with 93 tune.
18x11 wheels, I in spacers in front, with 285, 200tw tires.
2012 GT performance package front brakes.
G-LOC R16 front, R8 rear.
SS brake lines.
STR 600 brake fluid.
4in brake cooling ducts.
Corner balanced.
This is not a daily driver, only time I drive it on the street is to get gas or go to a local Autox. Primary goal is SCCA T3 (That’s why the 285 tires) and Autox between track events.
I have been doing autox and track day stuff for about 5 years. Started the first year with everything stock. The next year upgraded to 14in brakes with R10 in front and 18x10 wheels with 340tw tires. All the upgrades have been added a little each year, but my primary concern has always been the brakes. They have never been consistent since I put the 14in brakes on. I am always getting brake fade and or excessive pedal travel. There are some other things I have questions on, but the brakes are number one.
I ran VIR (first time) about 6 weeks ago and lost it in turn one twice when the brakes would not grab. Checked the system for any air and all was good. Therefore, I just took it easy the rest of the weekend. Being the track was new to me, I could not determine if it was the car or me. My best time for that weekend was 2:30.4.
Last weekend went to NCCAR. I have run NCCAR 10+ times, so I am comfortable with this track. During the first session, the brake pedal travel started getting longer and longer. By the end of the day it felt like the pedal was at the floor by the time the brakes really started to grab. It stayed this way for the rest of the weekend. In the past, even with the pedal travel getting longer, with R10s in the front, I could brake at the 300 mark and make a smooth transition at turn 11 (Braking zone of 120-130 to 25-35). With the R16, I was braking at the 500 marker. I tried to brake at the 300 marker and it just did not feel right so I stuck with the 500 marker. This also creates a problem when I just want to “tap” the brakes to set the car prior to corner entry at turn 7. Feels like a long pedal travel before I get the brakes to respond.
Once the long pedal travel starts, it stays this way until everything cools off and I bleed the brakes, but I never get any air out. I have checked everything I can think of with the brakes. The brake booster checks good. No system leaks. If this is something to be expected, so be it, I will learn to work with it. Any thoughts on what I may need to do.