| [GMCnet] Brake fluids [message #110826] |
Tue, 04 January 2011 19:34 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma:
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Senior Member |
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G'day,
When we were discussing Dan's brakes someone mentioned that Summit had brake
fluid that came in two colors which made it easy to flush.
I have been a proponent of ATE brake fluid because they make Dot 4 brake
fluid in two colors with the highest dry and wet boiling points available
that was OK for use in non racing vehicles. This was true up until I found
the information on Wilwood EXP 600.
ATE Super Blue Racing: Dry boiling point: 536°F Wet boiling point: 392°F
http://www.tirerack.com/brakes/accessoryDetail.jsp?ID=21
ATE TYP 200: Dry boiling point: 536°F Wet boiling point: 392°F
http://www.tirerack.com/brakes/accessoryDetail.jsp?ID=22
As you can see in the blurb ATE recommends changing it every three years and
"The identical specifications of the fluid and color difference make it easy
to know when the old fluid is completely flushed out of the system."
Here's the info on Wilwood EXP 600 on the Summit website:
http://www.summitracing.com/parts/WIL-290-6209/
Which has the following specs:
Wilwood EXP 600 Plus Super High-Temp racing brake fluid is a highly refined
blend developed for extreme performance under the high heat and extreme
pressure of professional motorsports. EXP 600 Plus has tested to 626 degrees
F with a wet boiling point of 417 degrees F. These numbers far exceed any
DOT or SAE specifications. EXP 600 Plus brake fluid has been proven to
maintain a firm pedal feel and quick response and IT HAS LOW-MOISTURE
AFFINITIES TO SLOW THE NATURAL ABSORPTION RATE OF WATER VAPOR. For optimum
performance, EXP 600 Plus should not be diluted with any other brake fluids;
add new fluid to a clean system.
I contacted Wilwood in an attempt to get a recommended interval to flush it
so I could compare it to the ATE fluid. Below you will find my email and
Wilwood's response. As you can see they said it is OK for street use but
didn't provide a recommended flush interval.
Also at $18.75 for 16.9 ounces (500cc) EXP 600 is three times the price than
the ATE at $12.00 for 33.8 ounces (1000cc). That's $37.00 vs. $12.00. I
found that it took 1 liter to fill the whole system in Double Trouble (front
& middle disks, rear drums) so the cost to fill or flush would triple.
Here's a link to a chart I found that provides some other racing brake
fluids. BE CAREFUL and do your own research as some of these are NOT
recommended for use in non-racing vehicles!
http://www.pegasusautoracing.com/group.asp?GroupID=BRAKEFLUID
In case you're wondering what I'm going to do; I have two liters of ATE
Super Blue and Three liters of Type 200 so that should answer that question.
So now you ask what would I do if I didn't have that and the answer is
DUNNO! ;-)
STOP THE PRESSES!!!! I just spotted this in Wilwood's flyer on the EXP 600!
"Use of EXP should be restricted to not more than 12 months."
http://www.wilwood.com/PDF/Flyers/fl178.pdf
Looks like Wilwood customer service leaves a bit to be desired!
Well now I KNOW I'll be staying with ATE!
Regards,
Rob M.
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
----- Original Message -----
From: Rob Mueller
To: customerreply@wilwood.com
Sent: Thursday, December 30, 2010 11:21 PM
Subject: EXP 600 Plus
Hi,
I have a 1975 GMC Motorhome that uses the front end drive/suspension/disk
brakes which are the same as the Oldsmobile Toronado of the same year. The
rear four wheels have drum brakes.
I have just finished rebuilding the system completely and found your EXP 600
racing brake fluid and would like to know if you would recommend putting it
in my Motorhome.
If yes how often would you recommend flushing and refilling it to remove
moisture?
Please advise.
Thank you,
Rob Mueller
********************************************************************
From: Customer Reply [mailto:customerreply@wilwood.com]
Sent: Wednesday, January 05, 2011 6:33 AM
To: Rob Mueller
Subject: Re: EXP 600 Plus
Rob,
Thank you for the inquiry with Wilwood Disc Brakes. The Wilwood EXP600
brake fluid is a DOT 4, as long as this is compatible with your hydraulic
system, it is compatible for street use.
Flushing the brake system is not entirely based on time, but also on use and
climate. You will have to monitor it like any other DOT 3 or DOT 4 brake
fluid, to see when flushing is needed.
Regards,
MJ
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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