Getting to track day

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Jul 31, 2017 | 03:43 PM

#21

FYREANT

I'm Batman..

Joined: Apr 2014

Posts: 6,142

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From: Lehigh Acres FL

Tech Contributor

Quote:

Originally Posted by BradT

Thanks for your input Poor-Sha. I have seen your posts and I know you are a serious track guy who does what is needed to be on the track. The fact that you don't change your fluid confirms what I thought should be the case, that it is fine for every day.

Any idea how much brake fluid is needed completely replace with SRF?

It took me about 1.5 pints to flush mine if I remember correctly..

Aug 2, 2017 | 06:01 PM

#22

Bill Dearborn

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Joined: Oct 1999

Posts: 41,043

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From: Charlotte, NC (formerly Endicott, NY)

Quote:

Originally Posted by koranke

So I just read an interesting post of the topic of brake fluid and track-grade versus street-grade. In short, the explanation was that track-grade brake fluid achieves its desirable track properties (high boiling temp) at the expense of stability (resistance to absorbing moisture). There's nothing wrong with using track-grade brake fluid on the street as long as you're changing your brake fluid every month or so. But if you only change the fluid once a year, for example, then you run the risk of premature rusting of parts in the braking system along with decreased braking performance. Street-grade braking fluid sacrifices resistance to boiling in favor of stability.

So, in answer to part of my question, there's absolutely nothing wrong with switching to track-grade brake fluid and driving a few hours to get to a track, but you wouldn't want to leave that same fluid sitting in the car for the rest of the year.

If you use a DOT4 or DOT3 based track brake fluid you will have the same guaranteed wet boiling point any other DOT 4 or 3 product is required to have. That is why they are DOT rated. They are all good but some are better than others and that is where the high dry boiling point come in. I use either a Wilwood 600 EXP which has a dry boiling point above 600 degrees or a Ferodo brake fluid with about the same dry boiling point. Both are DOT 4 fluids but I flush them before each track event if there is more than one month between events as I want the dry boiling point to be as high as possible. That is why I don't use SRF. SRF's dry boiling point is 20 to 30 degrees lower than those two. It does have a high wet boiling point but that is more than 100 degrees lower than what I want. The wet boiling point is SRF's claim to fame but now that so many track fluids have such high boiling points it doesn't make sense to go with SRF. At its cost it isn't worth it to dump it out when I can get what I want at lower cost.

Bill

Last edited by Bill Dearborn; Aug 2, 2017 at 06:01 PM.

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