Why not DOT 4 brake fluid all the time???
09-20-2017, 09:42 PM
#21
I believe if you live in the south and do frequent track days, DOT4 all the time would be no issue based on the Spring Mt folks. If you live in the north and have real winter or do rare track days change to DOT3 except for the track.
I think it is a balance of cost, high temp performance, viscosity when cold and water absorption risks when stored.
09-20-2017, 11:42 PM
#22
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+1
I believe if you live in the south and do frequent track days, DOT4 all the time would be no issue based on the Spring Mt folks. If you live in the north and have real winter or do rare track days change to DOT3 except for the track.
I think it is a balance of cost, high temp performance, viscosity when cold and water absorption risks when stored.
I believe if you live in the south and do frequent track days, DOT4 all the time would be no issue based on the Spring Mt folks. If you live in the north and have real winter or do rare track days change to DOT3 except for the track.
I think it is a balance of cost, high temp performance, viscosity when cold and water absorption risks when stored.
Bill
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09-20-2017, 11:46 PM
#23
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DOT 4 won't "gum up" in cold weather!!
Take a look at the dry and wet boiling temps of a list of brake fluids on the site linked below.
I use Castrol SRF not because of the high DRY boiling point (well - that's one of the main reasons), but especially because of the WET boiling point!! In that list you can see that the SRF dry/wet temps are 608°/518°. There are 15 or so fluids with higher DRY boiling points, but only several that have a WET boiling point within 100° of the SRF wet boiling temp.
The Torque fluid has a very high dry point, but the wet is still 79° less than the SRF. The Endless is a great fluid but the wet point is still 94° less than SRF's wet point
Castrol SRF's WET boiling point is higher than many of the DRY boiling temps on that list!!!!! That's why I like the Castrol SRF - it's more expensive, but I can leave it in all track season (only flush in fresh once/year with minor bleeds when I put in fresh pads) instead of flushing in fresh fluid 3 or 4 times per season
https://www.lelandwest.com/brake-flu...ison-chart.cfm
Take a look at the dry and wet boiling temps of a list of brake fluids on the site linked below.
I use Castrol SRF not because of the high DRY boiling point (well - that's one of the main reasons), but especially because of the WET boiling point!! In that list you can see that the SRF dry/wet temps are 608°/518°. There are 15 or so fluids with higher DRY boiling points, but only several that have a WET boiling point within 100° of the SRF wet boiling temp.
The Torque fluid has a very high dry point, but the wet is still 79° less than the SRF. The Endless is a great fluid but the wet point is still 94° less than SRF's wet point
Castrol SRF's WET boiling point is higher than many of the DRY boiling temps on that list!!!!! That's why I like the Castrol SRF - it's more expensive, but I can leave it in all track season (only flush in fresh once/year with minor bleeds when I put in fresh pads) instead of flushing in fresh fluid 3 or 4 times per season
https://www.lelandwest.com/brake-flu...ison-chart.cfm
I don't use SRF because the wet boiling point is too low for me. I use 600+ fluids and flush mine if it has been in the system over a month.
If I was using SRF I would be dumping $70 fluid in the waste can instead of $26 fluid.
Bill
03-07-2021, 10:45 AM
#24
I know this thread is more than a few years old now, however I thought I'd post this update. This is out of the 2019 Owners Manual, page 321. The recommended brake fluid is DOT 4, so I don't know if this change was made, but my 2016 Owners Manual did state DOT 3. I guess they've upgraded now use DOT 4 for the C7's.
Last edited by SpeedRacerMach; 03-07-2021 at 10:46 AM.
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03-07-2021, 05:12 PM
#26
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St. Jude Donor '13
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03-08-2021, 11:27 PM
#29
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St. Jude Donor '13
^^^
Thanks.
Thanks.
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