Originally Posted By: STG
Originally Posted By: dailydriver
Pablo (or ANY of the dealers on here); any more info on this??
I am really curious as to who is sub contracting this stuff for A.J.?
With the 600, did they purposely target the rate/speed of hygroscopicity to avoid the need to CONSTANTLY bleed/flush the system like other racing/high temp brake fluids (when used for a street application)???
The rate of hydroscopicity is not in itself an indicator of brake fluid longevity.
I asked an engineer at Continental Automotive Systems USA about the differences in Ate brake fluid performance and was given a rather suprising answer regarding brake fluid water absorption.
Ate Super Blue / Typ 200 is Ate's longest-lasting brake fluid not because it absorbs less moisture, but because it can handle more moisture and still perform better than other Ate fluids.
As it turns out, Super Blue / Type 200 actually absorbs more moisture faster than any other Ate DOT 3 or 4 fluid.
It's not the rate of moisture absorption or saturation that affects a brake fluid's longevity or performance. It's how a given fluid handles the moisture it has absorbed.
I received a short e-mail outlining this:
Stan, it was a pleasure speaking with you about our ATE brake products and we certainly appreciate your business.
I spoke to our technical staff about your question and this was their response. I hope that this information will be of some benefit to you.
Question: Can we provide information about the moisture absorption rate of all of your different types of ATE brake fluid?
As the moisture absorption rate is dependent on external conditions such as temperature, moisture content, area of the absorbing fluid surface and depth of the absorbing fluid layer, it is not reasonable to define moisture absorption rates for any of these conditions explicitly.
The absorption rate under comparable conditions is the least for ATE DOT 3 and increases for the following brake fluids respectively: ATE DOT 4 SL, ATE Super DOT 4, ATE DOT 4 SL.6, ATE Typ 200 / ATE Super Blue Racing.
However, the boiling point depression caused by the water absorption is the least for ATE Typ 200 / ATE Super Blue Racing and the highest for ATE DOT 3.
In conclusion, these two effects moving in opposite directions cause the well-known dependence between boiling point and water content and the superior behavior of e.g. ATE Typ 200 compared to ATE DOT 3 despite of its higher moisture absorption rate.
Donald James
Marketing
Aftermarket - North America
Continental Automotive Systems
YES, THANK YOU STG for this helpful info!!
I have heard this same hygroscopicity explanation before for Ate's (and others') fluids. I must have forgotten it over the years.
This is why so many autocrossers/open trackers/HDPE people use this stuff in daily driven, dual purpose cars. (As well as that they can tell when the system is fully flushed on a complete change by switching between the two different color, but same spec, Type 200/Super Blue Ate fluids.)