Brake fluid

[Neal 111]

Morning all.  I've just spent most of my night shift at work looking at brake fluids.

To many reviews and the late hour has mashed my brain which isn't hard to do in normal hours.

Is dot.5.1 actually any better then dot4? 

What does dot actually mean? 

What is the go to fluid for a road track combination?

Thanks all

[Guest]

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[Church 209]

wasn't from dot4 ones best temps wise Torque RT700?

[Deacon 1357]

I'm on ferodo dot 5.1. Seemed to hold up to Oulton on Friday quite happily.

[Ade 517]

 

5 minutes ago, Church said:

wasn't from dot4 ones best temps wise Torque RT700?

I wouldn't recommend a race fluid like that unless you like flushing it through often! 

What people often overlook is that the high temp brake fluids tend to have a higher absorption rate of moisture. 

@Neal its down to the viscosity and boiling point: https://en.wikipedia.org/wiki/DOT_5.1

I'd suggest a dot 5.1 will be fine and can go 2 years between services unlike race fluid. I use Motel Dot 5.1 currently. 

 

[Neal 111]

Thanks Gents.  5.1 it is. I think I'll uprate the brake lines at the same time.

@Ade as the forums main equipment guru is there a particular brand/type of brake line which recommended or is it a simple choice of hell and Goodrich.

Thanks again

[Ade 517]

16 minutes ago, Neal said:

Thanks Gents.  5.1 it is. I think I'll uprate the brake lines at the same time.

@Ade as the forums main equipment guru is there a particular brand/type of brake line which recommended or is it a simple choice of hell and Goodrich.

Thanks again

I've got Hel at the front and Goodridge at the back!

Quite a few people recently fitted HEL and the quality seems good. 

[Mike 458]

I've got Hel lines... on my table at home, will be going on the car next month though, just need to sort some new brake pads first.

[Church 209]

Ade: but wet boiling points also seem rather high for best fluids like RT700 & even more so, SRF, even if/with moisture absorbed, not freshly flushed.