04-13-2018, 08:33 PM | #1 |
2018 1LE, NASA Instructor
Drives: 2018 Camaro SS 1LE Join Date: Jan 2018
Location: New England
Posts: 235
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Track Day With Stock Pads - Temperature Readings, etc
Finally had a chance to take my recently purchased SS 1LE to a track day. Ran at Lime Rock Park (temperatures were 50-65, first 3 sessions damp/light rain, but good traction, last session dry but with a bit more traffic), all on instructor group.
Wanted to report on braking with stock rotors, pads, tires, etc. Lime Rock is not hard on brakes, and my car was still in the break in period so I was not wringing it to red line. I was running very consistent laps, with only the slightest bit of fade towards the end of 20 min at pace. To give you an idea of how consistent the car and brakes were running, here is a screen cap of a string of 7 laps all in the 1.02.02 to 1.02.86, and that is navigating through at least one or two cars/lap. Car is just amazingly consistent. (for reference my personal best at LRP in my C7 Z51 was 59.79, and most of my C7 laps are in the 1.00.xx and 1.01.xx - so I was only about 1 sec off a C7 Z51 pace, without trying hard ) |
04-13-2018, 08:43 PM | #2 |
2018 1LE, NASA Instructor
Drives: 2018 Camaro SS 1LE Join Date: Jan 2018
Location: New England
Posts: 235
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So how did the brakes do? How hot did they get. For stock pads, they were excellent. Initial bite is not that great and you need to press hard on the pedal, but modulation was very good, and fade resistance was also very good. They probably flaked a bit as brake grind/squeal was increasing on long brake zones (end of straight from ˜130MPH to ˜70MPH).
The Front and Rear Calipers only reached 290F and 250F respectively (see temp strips below). The front and rear rotors both reached around 800C/˜1450F. This puts it in Carbotech XP10 territory, with its claimed fade resistance "in excess of 801C/1475F". (see rotor temp paint pictures below) I was pleasantly surprised, after reading reports on this forum of astronomical brake caliper temperatures. Granted, Lime Rock is probably the easiest track on brakes that exists - so it is a best case scenario. Last edited by baron95; 04-13-2018 at 08:54 PM. |
04-13-2018, 08:53 PM | #3 |
2018 1LE, NASA Instructor
Drives: 2018 Camaro SS 1LE Join Date: Jan 2018
Location: New England
Posts: 235
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Now the only thing that got me a bit worried is that I had some streaking coming out of the bleed screws and being baked on the caliper surface on both fronts and one rear caliper. I cleaned the rear and it didn't recur. I cleaned the fronts twice and it recurred. I checked that the bleed screws were tight, and they were didn't move even while hot, when it tried to tighten them.
So not sure what is going on here - maybe some residual fluid under the rubber caps. Has anyone else seen this? (Fluid was Motul 600F) |
04-14-2018, 09:43 AM | #4 |
Drives: ZL1 1LE Join Date: Oct 2016
Location: California
Posts: 1,297
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The nipples seem to leak regardless how well you clean them after a bleed. I'm starting to gather this is normal as it happened on my SS1LE and now my ZL1 1LE. Your info seems to mimic what other people are finding. I would, however, bypass an XP10 completely (if you were thinking about getting a set).
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04-14-2018, 11:59 AM | #5 | |
2018 1LE, NASA Instructor
Drives: 2018 Camaro SS 1LE Join Date: Jan 2018
Location: New England
Posts: 235
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Quote:
As to XP10, not planning on running those. I have a front set of XP12s (ordered before doing more research), a donated F/R set of Power Stop Track Day pads, and for the rear a huge collection of left over Z51 pads (2 sets of OEMs, etc). Which will such, if I like the OEMs, to have to run through all those, just to end up where I started |
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04-15-2018, 04:26 AM | #6 |
Drives: 2022 1SS 1LE A10 BCD WCT+PDR Join Date: Mar 2008
Location: Johnstown, PA
Posts: 3,200
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The bleeders are not leaking. It is residual fluid left in the bleeder after bleeding. The bleeders point up, when you close the bleeder there is still some fluid left in the upper part. At the track it gets hot and pushes up and out causing the ugliness.
When I am done bleeding, I spray brakleen down inside the bleeder. I wrap a rag around it so it doesn't spray everywhere. I will do this two or three times, just a quick blast of Brakleen. I then take compressed air (air duster in a can) and again blow it out to remove all remaining liquids. Brakleen evaporates quickly, but the air blast is me being OCD. I then reinstall the black rubber cap. I have never had "leaking" bleeders or the stains. From your pic it looks as though it came out of the threads. Doing this also helps clean out the threads. Many of us have had a bleeder break. Since the brake fluid is corrosive, it seizes the threads and gets super tight. I do not overtighten but had a rear bleeder get tough before I really focused on what the problem was. I did break it.
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04-15-2018, 03:40 PM | #7 |
1LE Convert
Drives: 2018 ZLE Join Date: Apr 2017
Location: Mountain View, CA
Posts: 367
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Ditto, also seen the seeping stains. I cleaned it off after getting into the paddock.
Good to know about the methods to dry off the bleeder screws, thanks cdb! |
04-15-2018, 03:46 PM | #8 |
LT4 M6
Drives: 2018 ZL1 1LE Join Date: Nov 2010
Location: Bloomington, IN
Posts: 1,249
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I went ahead and checked my bleeders. They are indeed full of fluid, and just from street driving the rubber caps are wet on the inside too.
It was easy to clean them up without taking the wheels off. Glad I saw this thread. |
04-15-2018, 07:58 PM | #9 | |
2018 1LE, NASA Instructor
Drives: 2018 Camaro SS 1LE Join Date: Jan 2018
Location: New England
Posts: 235
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Quote:
Is Motul 600/660 the common thread of the streaking? Maybe ATE200 just evaporated and Motul 600 spills over when hot. |
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04-15-2018, 08:02 PM | #10 | |
2018 1LE, NASA Instructor
Drives: 2018 Camaro SS 1LE Join Date: Jan 2018
Location: New England
Posts: 235
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Quote:
Seeing that my calipers didn't get very hot at all, I wished I had run first track day with stock fluid just to be able to report on its performance and get a baseline for others. |
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05-02-2018, 06:57 PM | #11 |
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I cleaned by bleeders and caps before a track day at COTA thanks to this thread. I had the streaks running down the full length of the calipers in front only after my last run. Of course at COTA you're braking form 140 down to 30 and a couple 100-120 to 30 every lap. Could smell those hot brakes. Using stock pads and SRF
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05-02-2018, 07:40 PM | #12 |
Drives: '18 1SS 1LE Join Date: Sep 2017
Location: Pennsyltucky
Posts: 2,571
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Does the brake fluid damage the finish on the calipers?
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05-03-2018, 02:14 AM | #13 |
1LE Convert
Drives: 2018 ZLE Join Date: Apr 2017
Location: Mountain View, CA
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I didn't have any damage that I could see. Nothing stayed on there longer than a few hours though. It can get caked on pretty hard, I used bug and tar remover spray to help clean it off.
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05-03-2018, 12:14 PM | #14 | |
Drives: 2019 ZL1 1LE Join Date: Feb 2017
Location: Gilbert, AZ
Posts: 645
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Quote:
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Old: 2017 SS 1LE
Old: 2017 ZL1 Current: 2019 ZL1 1LE |
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