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Old 03-21-2017, 12:48 PM   #15
mbar

 
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Originally Posted by OminouSS View Post
Makes perfect sense, thanks. Do you think you're seeing temperatures high enough at the caliper to compromise the fluid? If so, what pads are you running? I am guessing that the normal operating rotor temps are somewhere around 900-100f. I think it's possible we can push them to 1400 depending on the situation.. These are heavy cars. I'd like to run a digital temp sensor to the fronts one day just to get a feel for how hot the fluid is reaching. I do a touch test on the caliper when I get back to the pits and it does not feel to me that I'd be boiling. Are you running alcon tape or a bleeder sensor?
.
At the track I had fade with pads rated for 1400 F . No fade (yet) with pads rated for 1600 F . Also, If you don't change you fluid every other track event (Motul) you will boil you fluid. Another option is to use Castrol SRF and change fluid every track season (I'm testing this theory right now)
Thanks
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Old 03-21-2017, 01:32 PM   #16
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Originally Posted by mbar View Post
At the track I had fade with pads rated for 1400 F . No fade (yet) with pads rated for 1600 F . Also, If you don't change you fluid every other track event (Motul) you will boil you fluid. Another option is to use Castrol SRF and change fluid every track season (I'm testing this theory right now)
Thanks
I have not boiled my fluid, so I'm not sure about that absolute. I have not experienced brake fade with OEM pads but I suspect I might soon. Maybe I'm not driving hard enough yet.

What situations are you experiencing fade and cooking off fluid? What pads are you using?
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Old 03-21-2017, 01:41 PM   #17
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Disregard the above. We are comparing apples to oranges unless you've upgraded to ZL1/1LE brakes. There is a big difference - literally.
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Old 03-21-2017, 01:56 PM   #18
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i ran wilwood 570 fluid in my old cobalt ss and changed it about once a year and was fine but i only did about 3-4 track events a year
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Old 03-21-2017, 02:01 PM   #19
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Originally Posted by OminouSS View Post
I have not boiled my fluid, so I'm not sure about that absolute. I have not experienced brake fade with OEM pads but I suspect I might soon. Maybe I'm not driving hard enough yet.

What situations are you experiencing fade and cooking off fluid? What pads are you using?
Yes, you should expect a better performance/cooling if you run the 6 pistons brakes with a larger rotor .
This is only my case with Carbotec XP10 front / 8 rear. It's all about your driving style , experience , car weight , horse power , ambient temperature and the track itself.
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Old 03-27-2017, 11:35 PM   #20
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As long as you don't break the system open and introduce any air it is pretty easy to bleed the brakes at home using the pump/hold/open method.

I plan on putting some DOT 5.1 in mine here soon as well.
Just an fyi, page 205 of the manual specifically says to not use DOT 5 fluids
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Old 03-28-2017, 02:10 PM   #21
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Originally Posted by Inthepasture View Post
Just an fyi, page 205 of the manual specifically says to not use DOT 5 fluids
Correct, "DOT 5"

DOT 5.1 is not DOT 5. 5.1 is compatible with DOT 3/4 where DOT 5 is not. DOT 5.1 is a better fluid and what we used when I was into sportbikes as it has a lot higher boiling point over DOT 3.


Not to be confused with DOT 5, a silicone based fluid.
DOT 5.1 is one of several designations of automotive brake fluid, denoting a particular mixture of chemicals imparting specified ranges of boiling point.
A brake fluid's dry boiling point is the temperature at which the pure fluid will boil. Wet boiling point concerns the boiling temperature when the fluid contains water.
In the United States, all brake fluids must meet Standard No. 116; Motor vehicle brake fluids.[1] Under this standard there are three Department of Transportation (DOT) minimal specifications for brake fluid. They are DOT 3, DOT 4 and DOT 5.1.
DOT 5.1, like DOT 3 and DOT 4, is a polyethylene glycol-based fluid (contrasted with DOT 5 which is silicone-based). Polyethylene glycol fluids are hygroscopic and will absorb water from the atmosphere, which is necessary to prevent sheer and undiluted water in the braking system,[citation needed] which is very corrosive, also water droplets can freeze in the pipes, thus blocking the system.
DOT 5.1 is the non-silicone version of DOT 5, defined by FMVSS 116 as being less than 70% silicone. Above that threshold makes it DOT 5.

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[hide]
Boiling points[edit]

Minimum boiling points for these specifications are as follows (wet boiling point defined as 3.7% water by volume):
Boiling point ranges [2]Dry boiling pointWet boiling pointDOT 3205 °C (401 °F)140 °C (284 °F)DOT 4230 °C (446 °F)155 °C (311 °F)DOT 5260 °C (500 °F)180 °C (356 °F)DOT 5.1260 °C (500 °F)180 °C (356 °F)
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Old 03-28-2017, 03:01 PM   #22
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I will be testing full metallic pads over the next month. They are designed for street and track. If it proves to be good, we may just have ourselves a very nice offering in the future. I would love to cut down the after-track maintenance routine by leaving my track pads in for DD duties. I will report back soon.
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Old 03-28-2017, 03:03 PM   #23
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Originally Posted by OminouSS View Post
I will be testing full metallic pads over the next month. They are designed for street and track. If it proves to be good, we may just have ourselves a very nice offering in the future. I would love to cut down the after-track maintenance routine by leaving my track pads in for DD duties. I will report back soon.
What pads? CL?
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Old 05-06-2018, 09:54 AM   #24
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Originally Posted by kropscamaro16 View Post
i ran wilwood 570 fluid in my old cobalt ss and changed it about once a year and was fine but i only did about 3-4 track events a year
Hi Kropscamaro16,

Presently I own a '14 Corvette Stingray Z51, and in the past I have used Dot4 on a couple of my cars without issues, but after reading my Corvette's owner manual I noticed that they don't suggest for daily usage the DOT 4 fluid, only for track usage and afterwards go back to DOT3. Also I read somewhere else that DOT 4 needs more changes than the regular DOT 3 brake fluid.

I like spirited driving and maybe I would go back occasionally to a DE track event. The last time that I went with my C7 Z51 with stock fluid, it boiled.

After reading about the high boiling point of the Wilwood 570 DOT 3, I got very interested on it. Please share me your experience while using it. I try to google it and there are not many reviews information about it, and will like to try it on my Stingray Z51.
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Old 05-07-2018, 12:04 PM   #25
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it was good stuff and not bad price and also had upgraded ss lines so that helped also!
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Old 05-07-2018, 07:31 PM   #26
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Quote:
Originally Posted by kropscamaro16 View Post
it was good stuff and not bad price and also had upgraded ss lines so that helped also!
Thanks Kropscamaro16, very helpful
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Old 05-07-2018, 08:31 PM   #27
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Quote:
Originally Posted by kropscamaro16 View Post
it was good stuff and not bad price and also had upgraded ss lines so that helped also!
Compared to your stock brake fluid. Did the Wilwood 570 help you to don't boil your brake fluid? Any advantage over stock?
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