A wee bit of brake fade:

TheRedhead · 01-06-2019, 11:26 AM

I posted this on the Facebook group, and got some solid answers, but figured I'd throw it up on here, too. Can never get too many opinions.

So, I was at the FIRM in N Florida, 1.5 mile short track, lot of braking zones from about 60-100.

I swapped about 5 months ago to Motul 600 and stainless lines. Stock pads and rotors.

After about ten laps, I was experiencing a little bit of a mushy pedal, just about a 40% loss in feel. Nothing that was fear inducing, but a definite difference.

Consensus seems to be the pads, so that's where I am leaning toward replacing.

Any advice would be helpful.

Rlhay2 · 01-06-2019, 01:22 PM

Was this the 1st track event in the 5 months that fluid was in the reservoir?

nighttowl · 01-06-2019, 01:35 PM

Quote:

Originally Posted by Rlhay2

Was this the 1st track event in the 5 months that fluid was in the reservoir?

+1

you should replace the fluid before a track day.

A while back I had a similar issue - the cause was I was using the brakes too much.

TheRedhead · 01-06-2019, 01:44 PM

Quote:

Originally Posted by Rlhay2

Was this the 1st track event in the 5 months that fluid was in the reservoir?

Two track days on that fluid.

I drive the car maybe 2500 miles a year now, so figure there was about 1000 miles between then and Friday, but no real spririted driving.

nighttowl · 01-06-2019, 06:45 PM

Brake fluid is hydroscopic; meaning it will absorb water, usually from any surrounding air into the solution.

It may seem like it - but your brake system is not a sealed off from all points.
it doesnt matter how many miles you put on it, or how long it was in the car.

what matters is how long its been since the seal on the bottle was broken.

TheRedhead · 01-06-2019, 07:00 PM

Quote:

Originally Posted by nighttowl

Brake fluid is hydroscopic; meaning it will absorb water, usually from any surrounding air into the solution.

It may seem like it - but your brake system is not a sealed off from all points.
it doesnt matter how many miles you put on it, or how long it was in the car.

what matters is how long its been since the seal on the bottle was broken.

That makes perfect sense.

RedHot18 · 01-07-2019, 08:20 AM

Change the fluid, you will be fine. I track mine at Sebring and get a little softer pedal after a full very hot day. Stock pads work really well.

TheRedhead · 01-07-2019, 08:27 AM

Quote:

Originally Posted by RedHot18

Change the fluid, you will be fine. I track mine at Sebring and get a little softer pedal after a full very hot day. Stock pads work really well.

I'll definitely change the fluid. If I still experience similar fade, then I know it's the pads.

Aliveguy5 · 01-07-2019, 10:12 AM

If you run it hard I'd recommend a higher heat rated pad. I push my car hard at the track and I bought some mid-tier Gloc's and my pedal felt a lot better after getting the car nice and hot.

Our Stock pads are very very good though.

Blast2hell · 01-07-2019, 11:21 AM

I recommend Motul 660 instead of the 600. The 600 didn't cut it for me going into turn 17 at sebring one day. I'll never run 600 again. I know it runs fine for others at 600, but 660 isn't hurting anything.

TheRedhead · 01-07-2019, 11:45 AM

Quote:

Originally Posted by Blast2hell

I recommend Motul 660 instead of the 600. The 600 didn't cut it for me going into turn 17 at sebring one day. I'll never run 600 again. I know it runs fine for others at 600, but 660 isn't hurting anything.

I may just go SRF.

Blast2hell · 01-07-2019, 12:35 PM

Quote:

Originally Posted by TheRedhead

I may just go SRF.

Yeah SRF is good as well.

Aliveguy5 · 01-07-2019, 12:56 PM

SRF is the best and you would probably only need to flush once a year depending on how many events you do. I know not everyone will agree with that but SRF is in another tier compared to Motul. You pay for that tier too!

Stealth7 · 01-07-2019, 02:35 PM

Quote:

Originally Posted by Aliveguy5

SRF is the best and you would probably only need to flush once a year depending on how many events you do. I know not everyone will agree with that but SRF is in another tier compared to Motul. You pay for that tier too!

+1 Castrol SRF is awesome and lasts.

01-06-2019, 11:26 AM	#1
TheRedhead Drives: 2018 Red Hot ZL1 1LE Join Date: May 2017 Location: Tampa, FL Posts: 562	A wee bit of brake fade: I posted this on the Facebook group, and got some solid answers, but figured I'd throw it up on here, too. Can never get too many opinions. So, I was at the FIRM in N Florida, 1.5 mile short track, lot of braking zones from about 60-100. I swapped about 5 months ago to Motul 600 and stainless lines. Stock pads and rotors. After about ten laps, I was experiencing a little bit of a mushy pedal, just about a 40% loss in feel. Nothing that was fear inducing, but a definite difference. Consensus seems to be the pads, so that's where I am leaning toward replacing. Any advice would be helpful. __________________ 2018 RED HOT ZL1-1LE: Nav,PDR,Floor Mats Built!

01-06-2019, 06:45 PM	#5
nighttowl Sarcasm loading -------- Drives: 2018 ZL1 1LE Join Date: Dec 2011 Location: TX Posts: 1,808 View My Garage	Brake fluid is hydroscopic; meaning it will absorb water, usually from any surrounding air into the solution. It may seem like it - but your brake system is not a sealed off from all points. it doesnt matter how many miles you put on it, or how long it was in the car. what matters is how long its been since the seal on the bottle was broken. __________________ "The salesman actually told me to stop getting it sideways during the test drive" 2018 MBM ZL1 1LE - Stock 2014 CRT ZL1 574 rwhp, 537 rwtq - SOLD 2010 IBM SS Camaro VVT L99 w/ TR6060 swap, 489 rwhp, 444 rwtq - SOLD

01-07-2019, 11:21 AM	#10
Blast2hell Drives: 2020 ZLE Rally Green A10 Join Date: Sep 2016 Location: Orlando Posts: 178	I recommend Motul 660 instead of the 600. The 600 didn't cut it for me going into turn 17 at sebring one day. I'll never run 600 again. I know it runs fine for others at 600, but 660 isn't hurting anything. __________________ 2020 Rally Green ZLE A10 (SOLD)2017 NGM ZL1 A10 Built 3/31 Sebring Best Lap Time 2:29 Video Roebling Road Best Lap Time 1:25 Video

01-06-2019, 01:22 PM	#2
Rlhay2 Drives: 2017 ZL1 Join Date: Mar 2014 Location: DFW, TX Posts: 302	Was this the 1st track event in the 5 months that fluid was in the reservoir?

01-07-2019, 08:20 AM	#7
RedHot18 Drives: 2018 ZL1 Join Date: Jul 2017 Location: Vero Beach FL Posts: 114	Change the fluid, you will be fine. I track mine at Sebring and get a little softer pedal after a full very hot day. Stock pads work really well.

01-07-2019, 10:12 AM	#9
Aliveguy5 Drives: 2017 Red Hot ZL1 Join Date: May 2015 Location: Metro Detroit Posts: 216	If you run it hard I'd recommend a higher heat rated pad. I push my car hard at the track and I bought some mid-tier Gloc's and my pedal felt a lot better after getting the car nice and hot. Our Stock pads are very very good though.

01-07-2019, 12:56 PM	#13
Aliveguy5 Drives: 2017 Red Hot ZL1 Join Date: May 2015 Location: Metro Detroit Posts: 216	SRF is the best and you would probably only need to flush once a year depending on how many events you do. I know not everyone will agree with that but SRF is in another tier compared to Motul. You pay for that tier too!

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